49 results on '"Bañuelos Valenzuela, Rómulo"'
Search Results
2. Estimación de metano en corderos bajo condiciones de estiaje con dieta de mantenimiento y probióticos
- Author
-
Meza-López, Carlos, Bañuelos-Valenzuela, Rómulo, Echavarría-Cháirez, Francisco, Delgadillo-Ruiz, Lucía, Delgadillo-Ruiz, Eladio, and Gaytan-Saldaña, Norma
- Published
- 2024
- Full Text
- View/download PDF
3. Disparidad en daño al ADN, Hsp70 y apoptosis, por UVA en leucocitos ovinos y humanos
- Author
-
García-López, David Alejandro, primary, Ortiz-Letechipia, Jennifer, additional, Bañuelos-Valenzuela, Rómulo, additional, Reveles-Hernández, Rosa Gabriela, additional, Ramírez-Santoyo, Rosa María, additional, and Sánchez-Rodríguez, Sergio, additional
- Published
- 2024
- Full Text
- View/download PDF
4. Determination of aneuploidy/polyploidy in Holstein cows with a history of abortion
- Author
-
Meza-López, Carlos, primary, Bañuelos-Valenzuela, Rómulo, additional, Lozano-Carbajal, Braulio, additional, de la Colina-Flores, Federico, additional, and Delgadillo-Ruiz, Lucía, additional
- Published
- 2024
- Full Text
- View/download PDF
5. Estimación de metano en corderos bajo condiciones de estiaje con dieta de mantenimiento y probióticos
- Author
-
Meza López, Carlos, Bañuelos Valenzuela, Rómulo, Echavarría Chairez, Francisco Guadalupe, Delgadillo Ruíz, Lucia, Delgadillo Ruiz, Eladio, Gaytán Saldaña, Norma, Meza López, Carlos, Bañuelos Valenzuela, Rómulo, Echavarría Chairez, Francisco Guadalupe, Delgadillo Ruíz, Lucia, Delgadillo Ruiz, Eladio, and Gaytán Saldaña, Norma
- Abstract
The purpose was to estimate methane emissions and economic optimum in sheep under dry conditions with a maintenance diet, compare biopreparations of non-commercial microorganisms (PNC) and commercial probiotic REVET® (PCRE) at different concentrations in sheep in the semi-arid of Zacatecas. The experiment was carried out in El Remolino, Juchipila, Zacatecas, 21 Katahdin X Dorper cross sheep weighing 14.3±1.74 kg and maintenance diet were used. The PNC was included in T1 (100%), T2 (66%), T3 (33%), and a control T4, while the same conditions were applied to the PCRE in T5 (100%), T6 (66%), and T7 (33%). Weight was recorded and rumen content samples were obtained to quantify volatile fatty acids (VFAs), methane and ammonia. An analysis of variance was performed,and response functions were calculated to identify the economic optimum. TreatmentT2stands out, which used the PNC and showed the highest amount of VFAs with an intermediate production of methane, however, the best treatment wasT6 PCRE of the microorganism biopreparation since it showedconsistency in the production of VFAs and less methaneconcentration, but with a higher investment and lowereconomic gain. Microorganism biopreparations are an option for sheep producers with less investment capacity in the semi-arid region of Zacatecas, El propósitofue estimar emisiones de metano y óptimo económico en ovinos bajo condiciones de estiaje con dieta de mantenimiento, al comparar biopreparados de microorganismos no comercial (PNC) y probiótico comercial REVET®(PCRE) a diferentes concentraciones en ovinos en el semiárido de Zacatecas. El experimento se efectuóen El Remolino, Juchipila, Zacatecas,seutilizaron 21 ovinos cruza Katahdin X Dorper con peso de 14.3±1.74 kg y dieta de mantenimiento. El PNC se incluyó en T1 (100%), T2 (66%), T3 (33%), y un testigo T4, mismas condiciones se aplicaron al PCRE en T5 (100%), T6 (66%), y T7 (33%). Se registró el peso, se obtuvieron muestras de contenido ruminal para cuantificarácidos grasos volátiles(AGV ́s), metano y amoníaco. Se realizó un análisis de varianza y se calcularon funciones de respuesta para identificar el óptimo económico. Sobresale el tratamiento T2, que utilizó el PNC y mostró la mayor cantidad de AGV ́s con una producción intermedia de metano, sin embargo, el mejor tratamiento fue T6 PCRE del biopreparado de microorganismos ya que mostró consistencia en la producción de AGV ́s y menor concentración de metano, pero con una inversión mayor y menor ganancia económica. Los biopreparados de microorganismos son una opción para productores de ovinos con menorcapacidad de inversión en el semiárido de Zacatecas.
- Published
- 2024
6. Infección por Toxocara canis y su importancia en la salud animal y en la salud pública: una revisión
- Author
-
Alvarado-Borja, Valeria, primary, Valladares-Carranza, Benjamín, primary, Ortega-Santana, César, primary, Rivero-Pérez, Nallely, primary, Bañuelos-Valenzuela, Rómulo, primary, Zaragoza-Bastida, Adrián, primary, Delgadillo-Ruíz, Lucia, primary, and Velázquez-Ordoñez, Valente, primary
- Published
- 2023
- Full Text
- View/download PDF
7. Bacterias y protozoários ruminales presentes en ovinos suplementados con probióticos identificados por conteo y PCR punto final
- Author
-
Delgadillo-Ruiz, Lucía, Bañuelos-Valenzuela, Rómulo, Gallegos-Flores, Perla, Meza-López, Carlos, Echavarría-Cháirez, Francisco, and Valladares-Carranza, Benjamín
- Published
- 2022
- Full Text
- View/download PDF
8. Modificación de la fermentación ruminal in vitro para mitigación de metano mediante la adición de aceites esenciales de plantas y compuestos terpenoides
- Author
-
Delgadillo-Ruiz, Lucía, Bañuelos-Valenzuela, Rómulo, Gallegos-Flores, Perla, Echavarría-Cháirez, Francisco, Meza-López, Carlos, and Gaytán-Saldaña, Norma
- Published
- 2021
- Full Text
- View/download PDF
9. Composición química y efecto antibacteriano in vitro de extractos de larrea tridentata, origanum vulgare, artemisa ludoviciana y ruta graveolens
- Author
-
Delgadillo Ruíz, Lucía, Bañuelos Valenzuela, Rómulo, Delgadillo Ruíz, Olivia, Silva Vega, Mónica, and Gallegos Flores, Perla
- Published
- 2017
10. Fermentación ruminal in vitro y producción de AGVS, metano y bióxido de carbono con la inclusión de extractos de plantas del semidesierto zacatecano.
- Author
-
Bañuelos-Valenzuela, Rómulo, primary and Delgadillo-Ruiz, Lucía, additional
- Published
- 2022
- Full Text
- View/download PDF
11. Phytochemical Compounds and Pharmacological Properties of Larrea tridentata
- Author
-
Morales-Ubaldo, Ana Lizet, primary, Rivero-Perez, Nallely, additional, Valladares-Carranza, Benjamín, additional, Madariaga-Navarrete, Alfredo, additional, Higuera-Piedrahita, Rosa Isabel, additional, Delgadillo-Ruiz, Lucía, additional, Bañuelos-Valenzuela, Rómulo, additional, and Zaragoza-Bastida, Adrian, additional
- Published
- 2022
- Full Text
- View/download PDF
12. Uso de extractos de plantas en la fermentación ruminal in vitro
- Author
-
Delgadillo-Ruiz, Lucia, Bañuelos-Valenzuela, Rómulo, Echavarría-Cháirez, Francisco, Ivonne Gallegos-Flores, Perla, and Meza-López, Carlos
- Published
- 2019
- Full Text
- View/download PDF
13. Evaluación diferencial de extractos de orégano en la producción de ácidos grasos volátiles y metano durante fermentación ruminal in vitro
- Author
-
Gallegos-Flores, Perla, Bañuelos-Valenzuela, Rómulo, Delgadillo-Ruiz, Lucía, Echavarría-Cháirez, Francisco, Meza-López, Carlos, and Rodríguez-Tenorio, Daniel
- Published
- 2019
- Full Text
- View/download PDF
14. INHIBICIÓN DE MOVILIDAD BACTERIANA A PARTIR DE COMPUESTOS TERPENOIDES Y ACEITES ESENCIALES DE PLANTAS
- Author
-
Gallegos-Flores, Perla Ivonne, primary, Delgadillo-Ruiz, Lucia, additional, Bañuelos-Valenzuela, Rómulo, additional, Echavarría-Chairez, Francisco, additional, Valladares-Carranza, Benjamín, additional, and Meza-López, Carlos, additional
- Published
- 2022
- Full Text
- View/download PDF
15. Efecto de la poliploidia / aneuploidia linfocitaria sobre la fertilidad de vacas Holstein en el estado de Zacatecas, México
- Author
-
Lozano Carbajal, Braulio, Meza López, Carlos, de la Colina Flores, Federico, Bañuelos Valenzuela, Rómulo, and Jesús Báez Arellano, J.
- Published
- 2013
16. Modificación de la fermentación ruminal in vitro para mitigación de metano mediante la adición de aceites esenciales de plantas y compuestos terpenoides
- Author
-
Delgadillo Ruíz, Lucia, Bañuelos Valenzuela, Rómulo, Gallegos Flores, Perla, Echavarría Chairez, Francisco Guadalupe, Meza López, Carlos, Gaytán Saldaña, Norma, Delgadillo Ruíz, Lucia, Bañuelos Valenzuela, Rómulo, Gallegos Flores, Perla, Echavarría Chairez, Francisco Guadalupe, Meza López, Carlos, and Gaytán Saldaña, Norma
- Abstract
Essential oils from plants are volatile aromatic compounds, mainly terpenoids, phenylpropanoids; monoterpenes, sesquiterpenes, and alcohols, these present a wide range of antimicrobial and antioxidant activity, so the addition of essential oils of clove, eucalyptus, mint, rosemary, oregano, and cinnamon can modify ruminal fermentation by reducing the population of bacteria producing methane and thus have a reduction in the production of this gas. The objective of this work was to evaluate different essential oils and terpenoid compounds to improve ruminal fermentation and the production of volatile fatty acids, attenuating the generation of methane. The chemical composition (terpenoids) of the oils, as well as volatile fatty acids (VFAs), were determined by gas chromatography. For in vitro digestibility, the in vitro gas production technique was used, and the ruminal liquid was used. Methane was inferred from the concentration of VFAs. It was found that all the essential oils presented each one of the terpenoids in different concentrations, reporting the highest concentration of carvacrol in the essential oil of clove (303 mg mL-1) and oregano (1.20 mg mL-1); terpinene was presented in greater quantity in the essential oil of peppermint (4.83 mg mL- 1); for peppermint and rosemary oil, linalool was higher and for limonene, the highest concentration was in eucalyptus oil (449 mg mL-1) and rosemary (12.42 mg mL-1). For gas production in digestibility, eucalyptus essential oil at a dose of 0.3 presented 176 mL g-1 DM. For in vitro digestibility, rosemary oil in high dose (0.6 mL) presented the best ruminal fermentation since it had better methane mitigation (716.83 mM/L) without negatively affecting the concentration of VFAs (acetate, 1892.2; propionic, 526.14; butyric, 24.99 mM/L), as well as the terpenoids thymol, linalool, and limonene in high doses. It is concluded that the best in vitro ruminal fermentation with methane mitigation was observed with rosemary oil an, Los aceites esenciales de plantas son compuestos aromáticos volátiles, principalmente terpenoides, fenilpropanoides; monoterpenos, sesquiterpernos y alcoholes, estos presentan una amplia gama de actividad antimicrobiana y antioxidante, por lo que la adición de aceites esenciales de clavo, eucalipto, menta, romero, orégano y canela pueden modificar la fermentación ruminal al disminuir la población de bacterias productoras de metano y así tener una reducción de la producción de este gas. El objetivo fue evaluar diferentes aceites esenciales y compuestos terpenoides para mejorar la fermentación ruminal y la producción de ácidos grasos volátiles, atenuando la generación de metano. Se determinó la composición química (terpenoides) de los aceites, así como ácidos grasos volátiles (AGVs) por cromatografía de gases. Para la digestibilidad in vitro, se empleó la técnica de producción de gas in vitro y se utilizó líquido ruminal. El metano se infirió a partir de la concentración de AGVs. Se encontró que todos los aceites esenciales presentaron cada uno de los terpenoides en diferentes concentraciones, reportando la mayor concentración de carvacrol en el aceite esencial de clavo (303 mg mL-1) y en orégano (1.20 mg mL-1); el terpineno se presentó en mayor cantidad en el aceite esencial de menta (4.83 mg mL-1); para el aceite de menta y romero, linalol fue más elevado y para el limoneno la mayor concentración fue en el aceite de eucalipto (449 mg mL-1) y romero (12.42 mg mL-1). Para la producción de gas en las digestibilidades el aceite esencial de eucalipto a dosis de 0.3 presentó 176 mL g-1 MS. Para digestibilidad in vitro el aceite de romero en dosis alta (0.6 mL), presentó la mejor fermentación ruminal ya que tuvo mejor mitigación de metano (716.83 mM/L) sin afectar de manera negativa la concentración de AGVs (acetato, 1892.2; propiónico, 526.14; butírico, 24.99 mM/L), así como los terpenoides timol, linalol y limoneno en dosis alta. Se concluye que la mejor fermentación rum
- Published
- 2021
17. Caracterización química de extracto alcohólico de hoja de guayaba (Psidium guajava) y su efecto como inhibidor de movilidad para Escherichia coli O157:H7
- Author
-
Silva-Vega, Mónica, Bañuelos Valenzuela, Rómulo, Delgadillo Ruíz, Lucia, Gallegos Flores, Perla, Meza López, Carlos, Valladares Carranza, Benjamín, Echavarría Chairez, Francisco Guadalupe, Silva-Vega, Mónica, Bañuelos Valenzuela, Rómulo, Delgadillo Ruíz, Lucia, Gallegos Flores, Perla, Meza López, Carlos, Valladares Carranza, Benjamín, and Echavarría Chairez, Francisco Guadalupe
- Abstract
The objective was to characterize and determine the mobility inhibitory effect in Escherichia coli O157: H7 of extracts of guava leaves (Psidium guajava). New alternatives of natural origin "plant extracts" have been sought to eliminate colonization of pathogenic bacteria in animals and prevent contamination of meat. Guava leaf extract (Psidium guajava) has broad-spectrum antibacterial activity, due to the active ingredient quercetin. E. coli O157: H7 enterohemorrhagic, is a pathogen of great importance in public health, which can cause hemolytic uremic syndrome, and ruminants are recognized as the main host of E. coli O157: H7. The extract was prepared with guava leaves in 70% ethanol, obtaining a crude extract (Extract A) and a concentrated extract using the soxhlet equipment (Extract B). Its chemical composition was determined by gas chromatography. Nursing ruminants with diarrheal syndrome were sampled, the samples were transported in Stuart medium. The bacteria were isolated in Mac Conkey medium and subsequently seeded in CHROMagar™ 0157 medium for the identification of E. coli O157:H7. Mobility tests of E. coli O157: H7 were carried out in SIM medium, with guava leaf extract and as a reference, concentrations of carvacrol of 0.3, 1 and 5 mM and quercetin 205, 102 and 51 mM were used. 78 E. coli O157: H7 were identified, which showed inhibition in mobility at different concentrations of carvacrol, in quercetin 205 mM and 102.5 mM and in extracts A and B. It is concluded that the alcoholic extract of guava leaves and its compound in a greater proportion (quercetin) they are effective in inhibiting the mobility of E. coli O157 H7, El objetivo fue caracterizar y determinar el efecto inhibitorio de movilidad en Escherichia coli O157:H7 de extractos de hojas de guayaba (Psidium guajava). Se han buscado nuevas alternativas de origen natural “extractos de plantas” para eliminar la colonización de bacterias patógenas en animales y prevenir la contaminación de carne. El extracto de hoja de guayaba (Psidium guajava) tiene actividad antibacteriana de amplio espectro, debido al principio activo quercetina. E. coli O157:H7 enterohemorragica, es un patógeno de importancia en salud pública, que puede causar síndrome urémico hemolítico, además los rumiantes son reconocidos como el principal hospedero de E. coli O157:H7. El extracto fue preparado con hojas de guayaba en etanol al 70%, obteniendo un extracto crudo (Extracto A) y uno concentrado mediante el uso del equipo soxhlet (Extracto B). Se determinó la composición química por cromatografía de gases. Se muestrearon rumiantes lactantes con síndrome diarreico, las muestras fueron transportadas en medio Stuart. Las bacterias se aislaron en medio Mac Conkey y posteriormente fueron sembradas en medio CHROMagar™ 0157 para la identificación de E. coli O157:H7. Se realizaron pruebas de movilidad de E. coli O157:H7 en medio SIM, con extracto de hoja de guayaba y como referencia se utilizaron concentraciones de carvacrol de 0.3, 1 y 5 mM y quercetina 205, 102 y 51 mM. Se identificaron 78 E. coli O157:H7, las cuales mostraron inhibición en la movilidad a diferentes concentraciones de carvacrol, en quercetina 205 mM y 102.5 mM y en los extractos A y B. Se concluye que el extracto alcohólico de hojas de guayaba y su compuesto en mayor proporción (quercetina) son efectivos en la inhibición de movilidad de E. coli O157 H7
- Published
- 2020
18. Evaluación diferencial de extractos de orégano en la producción de ácidos grasos volátiles y metano durante fermentación ruminal in vitro
- Author
-
Gallegos Flores, Perla, Bañuelos Valenzuela, Rómulo, Delgadillo Ruíz, Lucia, Echavarría Chairez, Francisco Guadalupe, Meza López, Carlos, Rodríguez Tenorio, Daniel, Gallegos Flores, Perla, Bañuelos Valenzuela, Rómulo, Delgadillo Ruíz, Lucia, Echavarría Chairez, Francisco Guadalupe, Meza López, Carlos, and Rodríguez Tenorio, Daniel
- Abstract
The objective was to evaluate the effect of oregano extracts on ruminal fermentation in vitro in the production of gas, volatile fatty acids (VFA) and methane. Four preparations of oregano (Lippia graveolens) were obtained with different methodology; for an aqueous medium, were obtained two extracts (cooking and infusion), which were prepared with triple-destilled water. The alcoholic extract was prepared in ethanol: water (80:20, v/v) and finally the oily extract was obtained by hydrodistillation for one hour in a modified Clevenger equipment. The oregano extract with the best mitigation of methane was the oil extract by reducing the concentration of this gas three times with respect to the control 160.27 mM/L and 463.73 mM/L respectively. It can be concluded that according to the methodology used in the preparation of oregano extracts, it is the type of chemical structure and concentration of active ingredients that were found in each extract, so these differences are what marked the effects during the in vitro ruminal fermentation on the activity of ruminal microorganisms in the production of gas, VFA and methane, El objetivo fue evaluar el efecto de extractos de orégano sobre la fermentación ruminal in vitro en la producción de gas, ácidos grasos volátiles (AGVs) y metano. Se realizaron cuatro preparaciones de orégano (Lippia graveolens) con diferente metodología; para un medio acuoso, se obtuvieron dos extractos (cocción e infusión), los cuales fueron preparados con agua tridestilada. El extracto alcohólico, fue preparado en etanol: agua (80:20, v/v) y finalmente el extracto oleoso se obtuvo por hidrodestilación durante una hora en un equipo clevenger modificado. El extracto de orégano con mejor mitigación de metano fue el oleoso al reducir tres veces la concentración de este gas con respecto al control; 160.27 mM/L y 463.73 mM/L respectivamente. Se puede concluir que, de acuerdo a la metodología empleada en la preparación de los extractos de orégano, es el tipo de estructura química y concentración de principios activos que se encontraron en cada extracto, por lo que, estas diferencias son las que marcaron los efectos durante la fermentación ruminal in vitro sobre la actividad de microorganismos ruminales en la producción de gas, AGVs y metano
- Published
- 2019
19. Incidencia de Escherichia coli O157: H7 en heces de rumiantes lactantes con síndrome diarreico
- Author
-
Lara Duran, José Alfredo, Silva-Vega, Mónica, Delgadillo Ruiz, Olivia, Bañuelos Valenzuela, Rómulo, Delgadillo Ruíz, Lucia, Lara Duran, José Alfredo, Silva-Vega, Mónica, Delgadillo Ruiz, Olivia, Bañuelos Valenzuela, Rómulo, and Delgadillo Ruíz, Lucia
- Abstract
Objective . To identify Escherichia coli 0157:H7 present in diarrheal feces of lactating ruminants with diarrheal syndrome and safety of colostrum intake. Materials and methods . A feces sampling of 316 ruminants was carried out during the period of August 2015 to March 2016 in the municipalities of Río Grande, General Enrique Estrada, Morelos and Calera de Victor Rosales of the state of Zacatecas, obtained from 67 cattle, 183 sheep and 66 goats. Results . The following were identified in CHROMagarTM chromogenic medium: 260 coliforms, 78 Escherichia coli 0157:H7, 16 Proteus spp. and 25 colonies of unidentified bacteria, finding an incidence of Escherichia coli 0157:H7 of 22.03% in the four municipalities. Conclusions. Escherichia coli 0157:H7 is the second bacteria found in ruminant feces with an incidence of 22%, which is a mortality risk factor in lactating ruminants (less than 21 days old), causing economic loss and health risk for the population of the state of Zacatecas., RESUMEN Objetivo. Identificar Escherichia coli O157:H7 presente en heces diarreicas de rumiantes lactantes con síndrome diarreico y seguridad de ingesta de calostro. Materiales y métodos. Se realizó un muestreo de 316 rumiantes durante el período de agosto 2015 a marzo 2016 en los municipios de Río Grande, General Enrique Estrada, Morelos y Calera de Víctor Rosales del estado de Zacatecas, 67 de bovinos, 183 de ovinos y 66 de caprinos. Resultados. Se identificaron en medio cromogénico CHROMagarTM: 260 coliformes, 78 Escherichia coli O157:H7, 16 Proteus spp., y 25 colonias de bacterias sin identificar con este medio, encontrándose una incidencia de Escherichia coli O157:H7 de 22.03% en los cuatro municipios. Conclusiones. Escherichia coli O157:H7 es la segunda bacteria encontrada en heces de rumiantes con un 22% de incidencia, la cual es un factor de riesgo de muerte en rumiantes lactantes (menos de 21 días de nacidos) causando pérdidas económicas y riesgo para la salud de la población del estado de Zacatecas.
- Published
- 2019
20. Incidencia de Escherichia coli O157:H7 en heces de rumiantes lactantes con síndrome diarreico
- Author
-
Lara-Duran, José Alfredo, primary, Silva Vega, Mónica, additional, Bañuelos Valenzuela, Rómulo, additional, Delgadillo Ruiz, Lucía, additional, and Delgadillo Ruiz, Olivia, additional
- Published
- 2019
- Full Text
- View/download PDF
21. Efecto de la radiación ultravioleta (UV) en animales domésticos. Revisión
- Author
-
Olarte Saucedo, Maricela, primary, Sánchez Rodríguez, Sergio Hugo, additional, Aréchiga Flores, Carlos Fernando, additional, Bañuelos Valenzuela, Rómulo, additional, and López Luna, María Argelia, additional
- Published
- 2019
- Full Text
- View/download PDF
22. Efeito do cloridrato de clembuterol no aumento de peso e lesões histológicas em ratos
- Author
-
Valladares-Carranza, Benjamín, Bañuelos-Valenzuela, Rómulo, Peña-Betancourt, Silvia D., Velázquez-Ordóñez, Valente, Echavarría-Cháirez, Francisco G., Ortega-Santana, César, Sánchez-Torres, Juan E., and Lozano-Carbajal, Braulio
- Subjects
ELISA ,mice ,ratos ,clorhidrato de clembuterol ,clenbuterol hydrochloride ,toxicity ,toxicidad ,cloridrato de clembuterol ,toxicidade ,ratones - Abstract
Resumen El clorhidrato de clembuterol (CCL) es un p-agonista promotor del crecimiento en animales para abasto, pero su uso ilícito ha generado repercusiones en salud pública. Se realizó un modelo biológico con ratones, con el objeto de evaluar el efecto del CCL sobre la ganancia de peso y las lesiones histológicas que ocasiona. Los ratones fueron alimentados con carne de conejo, que previamente fue suplementada con CCL. Treinta y cinco días posexposición se registró el peso corporal; se obtuvo la concentración muscular y sérica de CCL a través de la prueba de ELISA, y se colectaron tejidos (hígado y corazón) para análisis histopatológico. Los valores obtenidos de los animales experimentales (G1 y G2) se analizaron mediante un diseño experimental completamente al azar con dos tratamientos (n = 10), sometidos a un análisis de varianza y comparación de medias con la prueba de Tukey (p < 0,05). Se registró un incremento de peso corporal de 7 g en el G1, contra 4,0 g del G2. El peso del hígado fue de 2,58 g y 1,79, respectivamente (p < 0,05). En el G1 la concentración muscular de CCL fue 5324 pg g-1 y en suero sanguíneo de 4378 pg g-1. Solo se observaron cambios histológicos en tejidos de los ratones del G1. El hígado mostró tumefacción celular, mitosis moderada, picnosis y degeneración hidrópica; en corazón, engrosamiento de fibras, pleomorfismo e hileración nuclear. El CCL favoreció el incremento de peso en los ratones expuestos, y provocó alteraciones estructurales en hígado y corazón. Abstract Clenbuterol hydrochloride (CLB) is a growth-promoting p-agonist in animals for supply, but its illicit use has generated repercussions on public health. A biological model with mice was developed to evaluate the effect of CLB on weight gain and histological lesions. Mice were fed rabbit meat, which was previously supplemented with CLB. Body weight was recorded 35 days post-exposure; muscular and serum concentration of CLB was obtained through the ELISA test, and tissues were collected from liver and heart for histopathological analysis. Values obtained from the experimental animals (G1 and G2) were analyzed by a completely randomized experimental design with two treatments (n = 10), subjected to an analysis of variance and comparison of means with the Tukey test (p
- Published
- 2017
23. Evaluación del perfil de nutrientes de bagazo de agave como alternativa de alimento para rumiantes
- Author
-
Delgadillo Ruíz, Lucia, primary, Bañuelos Valenzuela, Rómulo, additional, Esparza Ibarra, Edgar León, additional, Gutiérrez Bañuelos, Héctor, additional, Cabral Arellano, Francisco Javier, additional, and Muro Reyes, Alberto, additional
- Published
- 2018
- Full Text
- View/download PDF
24. Efecto del clorhidrato de clembuterol en la ganancia de peso y lesiones histológicas en ratones
- Author
-
Valladares Carranza, Benjamín, Bañuelos Valenzuela, Rómulo, Sánchez Torres, Juan E., Peña Betancourt, Silvia Denise, Echavarría Chairez, Francisco Guadalupe, Ortega-Santana, César, Lozano Carbajal, Braulio, Velázquez Ordóñez, Valente, Valladares Carranza, Benjamín, Bañuelos Valenzuela, Rómulo, Sánchez Torres, Juan E., Peña Betancourt, Silvia Denise, Echavarría Chairez, Francisco Guadalupe, Ortega-Santana, César, Lozano Carbajal, Braulio, and Velázquez Ordóñez, Valente
- Abstract
Clenbuterol hydrochloride (CLB) is a growth-promoting b-agonist in animals for supply, but its illicit use has generated repercussions on public health. A biological model with mice was developed to evaluate the effect of CLB on weight gain and histological lesions. Mice were fed rabbit meat, which was previously supplemented with CLB. Body weight was recorded 35 days post-exposure; muscular and serum concentration of CLB was obtained through the ELISA test, and tissues were collected from liver and heart for histopathological analysis. Values obtained from the experimental animals (G1 and G2) were analyzed by a completely randomized experimental design with two treatments (n = 10), subjected to an analysis of variance and comparison of means with the Tukey test (p < 0.05). There was an increase of 7 g in body weight in G1, compared to 4.0 g in G2. Liver weight was 2.58 g and 1.79, respectively (p < 0.05). In G1, CLB concentration in muscle was 5324 pg.g–1, and 4378 pg.g–1 in blood serum. Only histological changes were observed in the tissues of G1 mice. Liver showed cellular swelling, moderate mitosis, pyknosis and hydropic degeneration; in addition, fiber thickening, pleomorphism and nuclear atypia were observed in the heart. CLB contributed to weight gain in exposed mice and caused structural alterations in liver and heart., O cloridrato de clembuterol (CCL) é um b-agonista promotor do crescimento em animais para abate, porém o seu uso ilícito tem gerado repercussões em saúde pública. Fezse um modelo biológico com ratos, com o objeto de avaliar o efeito do CCL sobre o ganho de peso e as lesões histológicas que ocasiona. Os ratos foram alimentados com carne de coelho, que previamente foi suplementada com CCL. Trinta e cinco dias pós-exposição se registrou o peso corporal; obteve-se a concentração muscular e sérica de CCL através da prova de ELISA, e foram coletados tecidos (fígado e coração) para análise histopatológica. Os valores obtidos dos animais experimentais (G1 e G2) foram analisados mediante um desenho experimental completamente ao acaso com dois tratamentos (n = 10), submetidos a uma análise de variações e comparação de médias com a prova de Tukey (p < 0,05). Registrou-se um aumento de peso corporal de 7 g no G1, contra 4,0 g do G2. O peso do fígado foi de 2,58 g e 1,79, respectivamente (p < 0,05). No G1 a concentração muscular de CCL foi 5324 pg g–1 e em soro sanguíneo de 4378 pg g–1. Somente foram observadas mudanças histológicas em tecidos dos ratos do G1. O fígado apresentou inchaço celular, mitose moderada, picnose e degeneração hidrópica; no coração, engrossamento de fibras, pleomorfismo e filamento nuclear. O CCL favoreceu o aumento de peso nos ratos expostos, e provocou alterações estruturais em fígado e coração., El clorhidrato de clembuterol (CCL) es un b-agonista promotor del crecimiento en animales para abasto, pero su uso ilícito ha generado repercusiones en salud pública. Se realizó un modelo biológico con ratones, con el objeto de evaluar el efecto del CCL sobre la ganancia de peso y las lesiones histológicas que ocasiona. Los ratones fueron alimentados con carne de conejo, que previamente fue suplementada con CCL. Treinta y cinco días posexposición se registró el peso corporal; se obtuvo la concentración muscular y sérica de CCL a través de la prueba de ELISA, y se colectaron tejidos (hígado y corazón) para análisis histopatológico. Los valores obtenidos de los animales experimentales (G1 y G2) se analizaron mediante un diseño experimental completamente al azar con dos tratamientos (n = 10), sometidos a un análisis de varianza y comparación de medias con la prueba de Tukey (p < 0,05). Se registró un incremento de peso corporal de 7 g en el G1, contra 4,0 g del G2. El peso del hígado fue de 2,58 g y 1,79, respectivamente (p < 0,05). En el G1 la concentración muscular de CCL fue 5324 pg g–1 y en suero sanguíneo de 4378 pg g–1. Solo se observaron cambios histológicos en tejidos de los ratones del G1. El hígado mostró tumefacción celular, mitosis moderada, picnosis y degeneración hidrópica; en corazón, engrosamiento de fibras, pleomorfismo e hileración nuclear. El CCL favoreció el incremento de peso en los ratones expuestos, y provocó alteraciones estructurales en hígado y corazón.
- Published
- 2017
25. Evaluación de semilla de guayaba (Psidium guajava L.) como alternativa en la nutrición ruminal
- Author
-
Silva-Vega, Mónica, Bañuelos Valenzuela, Rómulo, Muro-Reyes, Alberto, Delgadillo Ruíz, Lucia, Esparza Ibarra, Edgar León, Silva-Vega, Mónica, Bañuelos Valenzuela, Rómulo, Muro-Reyes, Alberto, Delgadillo Ruíz, Lucia, and Esparza Ibarra, Edgar León
- Abstract
The nutritional contents of guava flour and germinated guava seeds were evaluated. A proximal analysis and in vitro digestibility were performed. There were significant differences between the flour and germinated guava seeds (p <0.01) for a percentage of ash, crude protein, crude fiber and neutral detergent fiber. In the in vitro digestibility, the highest gas production was given by germination, with 40 ml of gas per 200 mg of dry matter. The highest production of volatile fatty acids after in vitro digestibility (48 h) occurred in the germination of guava seed. Basing on these results, it is concluded that the flour and germinated guava seeds have the possibility of being used in the diet of ruminants., Resumen: Para evaluar los contenidos nutricionales de la semilla de guayaba se emplearon harina y germinado de la semilla. Se realizó un análisis proximal y digestibilidad in vitro. Existieron diferencias significativas entre la harina y germinado de semilla de guayaba (p<0.01) para porcentaje de ceniza, proteína cruda, fibra cruda y fibra detergente neutra. En la digestibilidad in vitro la mayor producción de gas se dio en germinado, con 40 ml de gas por cada 200 mg de materia seca. La mayor producción de ácidos grasos volátiles después de la digestibilidad in vitro (48 h) ocurrió en el germinado de semilla de guayaba. Se concluye que la harina y germinado de semilla de guayaba tienen posibilidad de ser utilizadas en la dieta de rumiantes.
- Published
- 2017
26. Macro-mineral concentrations in soil and forage in three grassland sites at Zacatecas
- Author
-
Valdez-Cepeda, Ricardo David, primary, Márquez-Madrid, Miguel, additional, Gutiérrez-Bañuelos, Héctor, additional, Bañuelos-Valenzuela, Rómulo, additional, and Muro-reyes, Alberto, additional
- Published
- 2017
- Full Text
- View/download PDF
27. Efecto del clorhidrato de clembuterol en la ganancia de peso y lesiones histológicas en ratones
- Author
-
Valladares-Carranza, Benjamín, primary, Bañuelos-Valenzuela, Rómulo, primary, Peña-Betancourt, Silvia D., primary, Velázquez-Ordóñez, Valente, primary, Echavarría-Cháirez, Francisco G., primary, Ortega-Santana, César, primary, Sánchez-Torres, Juan E., primary, and Lozano-Carbajal, Braulio, primary
- Published
- 2017
- Full Text
- View/download PDF
28. Determinación de falsos aneurismas y metabolitos plasmáticos como glucosa, proteínas, creatinina y cortisol en bovinos sacrificados en rastros TIF vs Municipal.
- Author
-
Meza López, Carlos, Aguilar Montalvo, Emmanuel, Lozano Carbajal, Braulio, Rodríguez Tenorio, Daniel, Delgadillo Ruiz, Lucia, and Bañuelos Valenzuela, Rómulo
- Abstract
Copyright of Congreso Internacional de Investigacion Academia Journals is the property of PDHTech, LLC and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2018
29. Pancreatitis, insuficiencia pancreática y diabetes mellitus en canis lupus familiaris.
- Author
-
Adame Magallanes, Isabel, Meza López, Carlos, Rincón Delgado, Romana Melba, Rodríguez Tenorio, Daniel, Delgadillo Ruiz, Lucia, and Bañuelos Valenzuela, Rómulo
- Abstract
Copyright of Congreso Internacional de Investigacion Academia Journals is the property of PDHTech, LLC and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2018
30. EFICIENCIA REPRODUCTIVA DE LA PUREZA GENOTÍPICA DE CERDOS CON ALIMENTACIÓN NO ÓPTIMA EN LUIS MOYA ZACATECAS.
- Author
-
Meza López, Carlos, Pérez Arce, Marisol, Lozano Carbajal, Braulio, Rodríguez Tenorio, Daniel, Delgadillo Ruiz, Lucia, and Bañuelos Valenzuela, Rómulo
- Abstract
Copyright of Congreso Internacional de Investigacion Academia Journals is the property of PDHTech, LLC and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2017
31. COMPOSICIÓN QUÍMICA Y FTIR DE EXTRACTOS ETANÓLICOS DE Larrea tridentata, Origanum vulgare, Artemisa ludoviciana Y Ruta graveolens.
- Author
-
Bañuelos-Valenzuela, Rómulo, Delgadillo-Ruiz, Lucía, Echavarría-Cháirez, Francisco, Delgadillo-Ruiz, Olivia, and Meza-López, Carlos
- Abstract
The active principles of aromatic plants can be relevant in the plant-plant interaction and primary source of one or more biochemical compounds. The genetic, agronomic and environmental factors determine the use of the extracts of plants as antimicrobial, antifungal and antioxidant agents. The hypothesis of this study was that the bioactive compounds of the extracts are phenolic compounds. The objective was to analyze the chemical composition and infrared spectroscopy, with Fourier transformation (FTIR), the ethanolic extracts of Larrea tridentata, Origanum vulgare, Artemisa ludoviciana and Ruta graveolens collected in the municipalities of Villa de Cos, Valparaiso and Calera de Victor Rosales, Zacatecas, Mexico. The collection of the plants was random in Spring and Summer of 2014 and 2015. Eleven samples (20 g, dry base) were analyzed, two of R. graveolens and three of the other species. The extracts were prepared with ethanol 70 %. In addition to the chemical profile (qualitative tests) and chemical composition by gas chromatograph (quantitative tests), the chemical structure was determined through FTIR. Unsaturates and esters were identified in the extracts of the four species; in addition, carbohydrates and flavonoids were identified in L. tridentata, in O. vulgare, carbohydrates, flavonoids and saponins, in A. ludoviciana, coumarins and saponins and in R. graveolens, flavonoids and saponins. The chemical composition showed the presence of thymol, carvacrol, terpinene, linalol and limonene in different concentrations. The FTIR analysis showed presence of groups C=C aromatics, groups C-O, links C-H, rings C=O, vibration of the aliphatic CH2 group and vibration of the hydroxyl group. The qualitative and quantitative analyses made it possible to identify phenolic compounds, and with FTIR the chemical structure of the extracts was identified. [ABSTRACT FROM AUTHOR]
- Published
- 2018
32. Prevalence of the Robertsonian (1;29) translocation incattle in the state of Zacatecas, Mexico
- Author
-
Meza-López, Carlos, primary, Lozano-Carbajal, Braulio, additional, De la Colina-Flores, Federico, additional, Bañuelos-Valenzuela, Rómulo, additional, López-Carlos, Marco Antonio, additional, Echavarría-Cháirez, Francisco G., additional, and Reveles-Torres, Luis Roberto, additional
- Published
- 2015
- Full Text
- View/download PDF
33. Riesgos a la salud por el uso de clorhidrato de clembuterol: una revisión
- Author
-
Valladares-Carranza, Benjamín, primary, Bañuelos-Valenzuela, Rómulo, additional, Peña-Betancourt, Silvia Denisse, additional, Velázquez-Ordóñez, Valente, additional, Echavarría-Cháirez, Francisco Guadalupe, additional, Muro-Reyes, Alberto, additional, and Ortega-Santana, César, additional
- Published
- 2015
- Full Text
- View/download PDF
34. Illegal Use of Clenbuterol in Cattle Production in México
- Author
-
Valladares-Carranza, Benjamin, primary, Bañuelos-Valenzuela, Rómulo, additional, Peña-Betancourt, Silvia D., additional, Velázquez-Ordoñez, Valente, additional, Velázquez-Armenta, Yadira, additional, and Nava-Ocampo, Alejandro, additional
- Published
- 2014
- Full Text
- View/download PDF
35. Efecto Inhibidor del D-Limoneno Sobre el Crecimiento de Tres Mohos que Causan Deterioro en Alimentos.
- Author
-
Rodríguez Neri, Salvador, Pérez Reyes, María Cristina Julia, Méndez Albores, Abraham, and Bañuelos Valenzuela, Rómulo
- Abstract
Copyright of Congreso Internacional de Investigacion Academia Journals is the property of PDHTech, LLC and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2015
36. Aberraciones cromosómicas en ganado vacuno joven-adulto en sistemas de explotaciones intensivas-extensivas en dos municipios de Zacatecas.
- Author
-
Meza López, Carlos, Lozano Carbajal, Braulio, Flores, Federico de la Colina, and Bañuelos Valenzuela, Rómulo
- Abstract
Copyright of Congreso Internacional de Investigacion Academia Journals is the property of PDHTech, LLC and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2015
37. LEAD CONCENTRATION IN FORAGE, FODDER, WATER AND BOVINE MILK IN SAN IGNACIO.
- Author
-
de León, Consuelo Letechipía, primary, Fuentes, Humberto Rodríguez, additional, Manzanares-Acuña, Eduardo, additional, Bañuelos-Valenzuela, Rómulo, additional, Salas-Luévano, Miguel Ángel, additional, Vega-Carrillo, Héctor René, additional, and Dávila, Víctor Martín Hernández, additional
- Published
- 2011
- Full Text
- View/download PDF
38. Human Lymphocytes Response to Low Gamma-ray Doses
- Author
-
Vega-Carrillo, Héctor René, primary, Manzanares-Acuña, Eduardo, additional, Bañuelos-Valenzuela, Rómulo, additional, Montaño Zentina, Luis Manuel, additional, and Herrera Corral, Gerardo, additional
- Published
- 2011
- Full Text
- View/download PDF
39. Niveles de plomo en la población de alto riesgo y su entorno en San Ignacio, Fresnillo, Zacatecas, México
- Author
-
Manzanares-Acuña, Eduardo, primary, Vega-Carrillo, Héctor René, additional, Salas-Luévano, Miguel Ángel, additional, Hernández-Dávila, Víctor Martín, additional, Letechipía-de León, Consuelo, additional, and Bañuelos-Valenzuela, Rómulo, additional
- Published
- 2006
- Full Text
- View/download PDF
40. Human Lymphocytes Response to Low Gamma-ray Doses.
- Author
-
Vega-Carrillo, Héctor René, Manzanares-Acuña, Eduardo, and Bañuelos-Valenzuela, Rómulo
- Subjects
LYMPHOCYTES ,GAMMA rays - Abstract
Radiation and non-radiation workers lymphocytes were exposed to a low strength gamma-ray field to determine heat shock protein expression in function of radiation dose. Protein identification was carried out using mAb raised against Hsp25, Hsp60, Hsp70 and Hsp90; from these, only Hsp70 protein was detected before and after lymphocyte irradiation. In all cases, an increasing trend of relative amounts of Hsp70 in function to irradiation time was observed. After 70.5 µGy gamma-ray dose, radiation worker's lymphocytes expressed more Hsp70 protein, than non radiation workers' lymphocytes, indicating a larger tolerance to gamma rays (gammatolerance), due to an adaptation process developed by his labor condition. [ABSTRACT FROM AUTHOR]
- Published
- 2002
41. Incidence of Escherichia coli 0157:H7 in feces of lactating ruminants with diarrheal syndrome.
- Author
-
Lara-Duran, José Alfredo, Silva-Vega, Mónica, Bañuelos-Valenzuela, Rómulo, Delgadillo-Ruiz, Lucía, and Delgadillo-Ruiz, Olivia
- Subjects
- *
ESCHERICHIA coli , *RUMINANTS , *COLIFORMS , *SYNDROMES , *SHEEP , *CATTLE reproduction - Abstract
Objective. To identify Escherichia coli 0157:H7 present in diarrheal feces of lactating ruminants with diarrheal syndrome and safety of colostrum intake. Materials and methods. A feces sampling of 316 ruminants was carried out during the period of August 2015 to March 2016 in the municipalities of Río Grande, General Enrique Estrada, Morelos and Calera de Victor Rosales of the state of Zacatecas, obtained from 67 cattle, 183 sheep and 66 goats. Results. The following were identified in CHROMagarTM chromogenic medium: 260 coliforms, 78 Escherichia coli 0157:H7, 16 Proteus spp. and 25 colonies of unidentified bacteria, finding an incidence of Escherichia coli 0157:H7 of 22.03% in the four municipalities. Conclusions. Escherichia coli 0157:H7 is the second bacteria found in ruminant feces with an incidence of 22%, which is a mortality risk factor in lactating ruminants (less than 21 days old), causing economic loss and health risk for the population of the state of Zacatecas. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
42. Fragmentación de ADN y cambios en la expresión de las proteínas Hsp70, Hsp90 y P53 en la piel de ratones BALB/c expuestos a luz ultravioleta UV (UVA, UVB, UVC).
- Author
-
Olarte-Saucedo, Maricela, García-López, David Alejandro, Ortiz-Letechipia, Jennifer, Palafox-Herrera, Azucena, Reveles-Hernández, Rosa Gabriela, López-Luna, María Argelia, Arechiga-Flores, Carlos Fernando, Bañuelos-Valenzuela, Rómulo, and Sánchez-Rodríguez, Sergio Hugo
- Abstract
OBJECTIVE: To analyze changes in the expression of Hsp70, Hsp90, p53 and DNA fragmentation in BALB/c mouse skin cells exposed to UVA, UVB and UVC radiation, as well as the decrease in skin damage using the antioxidants superoxide dismutase (SOD), glutathione peroxidase (GSH-Px) and catalase (CAT) topically. MATERIAL AND METHOD: A basic experimental study was done from March 2016 to February 2019 in which BALB/c mice were exposed to UVA, UVB and UVC radiation for 30, 60 and 90 minutes, skin extracts were obtained. The proteins were characterized by SDS-PAGE and Western-blot, and immunodetected with monoclonal antibodies. The DNA was evaluated for its integrity by electrophoresis in agarose gels. RESULTS: Changes in the morphology of the skin exposed to UV light were observed, Hsp70 and Hsp90 modified their expression by UV light (UVA, UVB, UVC) at different exposure times, this was also the case with p53, where its expression increased at 30 and 60 minutes of exposure. By using a cream with antioxidants discreetly decreased the expression of Hsp70 and Hsp90, while p53 increased. The DNA was fragmented mainly with UVB and UVC light. CONCLUSIONS: UV light generates cellular stress modifying the expression (increase) of Hsp70, Hsp90 and p53 proteins. Also, the fragmentation of DNA was observed, due to UV light. [ABSTRACT FROM AUTHOR]
- Published
- 2020
43. Effects of ultraviolet radiation (UV) in domestic animals. Review.
- Author
-
Olarte Saucedo, Maricela, Sánchez Rodríguez, Sergio Hugo, Aréchiga Flores, Carlos Fernando, Bañuelos Valenzuela, Rómulo, and López Luna, María Argelia
- Subjects
- *
ULTRAVIOLET radiation , *DOMESTIC animals , *BIBLIOGRAPHIC databases , *ATMOSPHERIC ozone , *OZONE layer , *ATMOSPHERIC layers , *CELLULAR aging - Abstract
Solar radiation is necessary for life on Earth. Environmental pollution is contributing to global climate change, in ways such as degrading the atmospheric ozone layer, vital to controlling the type and amount of ultraviolet (UV) radiation reaching the surface. Domestic animals are constantly directly exposed to solar radiation and can consequently develop skin lesions, optical tumors and thermal stress, or even die. UV light produces oxidative stress of the skin due to excessive production of reactive oxygen species (ROS), which can damage cells, causing cell aging or cancer. Antioxidants neutralize these harmful agents, but their activity decreases with organism age and metabolic state. A review was done of the histology and physiology of the skin, and the effects of UV radiation on domestic animals using bibliographic databases (PubMed/MEDLINE, Science) as well as journals available on the Internet. Understanding the effects of UV radiation on the health of domestic animals is vital since it can have substantial financial impacts on producers, compromise animal welfare and the quality and safety of animal-origin products. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
44. Prevalencia de la translocación robertsoniana 1;29 bovina en hatos ganaderos del estado de Zacatecas, México.
- Author
-
Meza-López, Carlos, Lozano-Carbajal, Braulio, de la Colina-Flores, Federico, Bañuelos-Valenzuela, Rómulo, López-Carlos, Marco Antonio, Echavarría-Cháirez, Francisco G., and Reveles-Torres, Luis Roberto
- Abstract
The purpose of this work was to estimate the prevalence of the Translocation 1;29 (t rob 1;29) in cattle herds in the Mexican state of Zacatecas. Blood samples were obtained from 661 bovines of eight breeds: Holstein (n= 284), American Swiss (n= 213), Braunvieh (n= 69), Simmental (n= 13), Angus (n= 5), Creole (n= 65), Chianina (n= 3) and Charolais (n= 9). Sampling was conducted in nine municipalities of the state of Zacatecas and one in the state of Aguascalientes. Age, sex and productive purpose were also recorded. Identification of the t rob 1;29 was performed by conventional cytogenetic technique. An overall prevalence of 4.1%, with no differences between males and females (6.0 vs 3.4% respectively), although greater (P<0.10) in young animals vs adults (5.4 vs 2.6% respectively) was observed. Breed differences (P<0.001) were observed with a greater prevalence in the Criollo breed (12.3%), followed by Swiss American breed (7.5%) and lower among Braunvieh (1.4%), Holstein (0.4%) and others breeds (0.0%). According to productive purpose a greater prevalence (P<0.001) was observed in dual purpose farms (12.3%) than dedicated exclusively to the milk (3.3%) or beef (2.4%) production. Based on these results and because of the potential negative effects on herd productivity, a chromosomal analysis of breeding animals is recommended as a routine practice, to identify animals carrying the t rob 1;29, mainly in sires. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
- View/download PDF
45. Consideraciones epidemiológicas en la prevalencia serológica de Brucella ovis en Zacatecas, México.
- Author
-
Carrera Chávez, José Maria, Echavarría Cháirez, Francisco Guadalupe, Aréchiga Flores, Carlos Fernando, Bañuelos Valenzuela, Rómulo, and Tórtora Pérez, Jorge Luis
- Subjects
- *
SEROLOGY , *BRUCELLA , *SHEEP diseases , *SHEEP industry , *SHEEP breeding - Abstract
Epididymitis due to Brucella ovis infection lead to a disease with great importance in Mexican sheep industry. In the affected rams produces a low productivity due to a decreased fertility. The objective of the study was to determine the relevance of different possible risk factors (production system, density of sires, population of ewes, ewes:ram ratio, mating system and sires breed) upon B. ovis prevalence in Zacatecas, México. A sample of 544 rams was obtained in 153 flocks from four production systems. The serological test was determined by double immunodiffusion. The positive sampled rams were 18.6 % (101/544) and 10.5 % (16/153) of the sampled flocks had at least one positive ram. The semi-intensive production system showed a major prevalence (P<0.05) with 86.1 % (87/101) of the positive rams, the extensive system with 11.9 % (12/101), the backyard with 2.0 % (2/101) and the intensive did not register positives. The prevalence of B. ovis was higher in larger flocks, with the largest number of ewes and rams. Katahdin rams showed a major prevalence (30.8 %) (24/78) than Rambouillet (14.0 %) (18/129), Dorper (13.8 %) (31/224) and Suffolk rams (13.8 %) (8/58); (P<0.05). The prevalence was associated more with the production system used, than the ratio ewes:ram or mating system. The results suggest that the amount of sires within each flock is the most important factor in the serological prevalence of B. ovis (OR= 17.38, 95% IC 7.76-38.94), although this potential factor could be subject to the production system. [ABSTRACT FROM AUTHOR]
- Published
- 2013
46. Influence of small ruminant grazing systems in a semiarid range in the State of Zacatecas Mexico. I Native vegetation.
- Author
-
Echavarría Chairez, Francisco Guadalupe, Gutiérrez Luna, Ramón, Ledesma Rivera, Rocío Inés, Bañuelos Valenzuela, Rómulo, Aguilera Soto, Jairo Iván, and Serna Pérez, Alfonso
- Subjects
- *
GRAZING , *PASTURES , *GRASSES , *LIVESTOCK , *SHEEP , *GOATS , *CATTLE - Abstract
The objective of this study was to measure growth, covering and chemical composition of native vegetation under two grazing systems. Goats and sheep with an esophageal fistula were used to collect forage intake samples under rotational and continuous grazing systems. Changes in dry matter, vegetation cover and botanical composition were monitored. Dry matter values changed from 30 to 471 kg ha-1 in continuous grazing and from 101 to 1,151 kg ha-1 in rotational grazing. Such behavior was partially due to a higher annual rainfall during the study period (600 mm) than the mean annual rainfall (400 mm). Vegetation cover under rotational grazing was 60 % against 35 % found in continuous grazing. Crude protein values did not show differences between both grazing systems. However, protein values showed differences between seasons and animal species (P<0.01). Goats collected more protein than sheep, with higher values in summer (12.0 %) and lower in winter and spring (5.3 and 4.3 %, respectively). Ashes, acid detergent fiber and neutral detergent fiber were also evaluated. Diet protein content was not affected for the big difference in plant species number between both grazing systems. It is concluded that the small ruminant grazing selectivity played an important role in this matter. [ABSTRACT FROM AUTHOR]
- Published
- 2006
47. Influencia del sistema de pastoreo con pequeños rumiantes en un agostadero del semiárido Zacatecano. I Vegetación nativa.
- Author
-
Echavarría Chairez, Francisco Guadalupe, Gutiérrez Luna, Ramón, Ledesma Rivera, Rocío Inés, Bañuelos Valenzuela, Rómulo, Aguilera Soto, Jairo Iván, and Serna Pérez, Alfonso
- Abstract
El objetivo del estudio fue monitorear el crecimiento, cobertura basal, composición química y botánica de la vegetación nativa, de un agostadero con dos sistemas de pastoreo. Se utilizaron ovinos y caprinos fistulados, los cuales se usaron para colectar el material herbáceo consumido por ellos en un sistema de pastoreo rotacional y un sistema de pastoreo continuo. Asimismo se monitoreó el crecimiento de materia seca, la cobertura vegetal y la composición botánica. En los dos ańos de estudio los rendimientos de materia seca pasaron de 30 a 471 kg/ha en pastoreo continuo y de 101 a 1,151 kg/ha en pastoreo rotacional, debido parcialmente a un incremento de 200 mm de precipitación durante los dos años de estudio, en una zona en donde la precipitación media es de 400 mm. La cobertura vegetal en el pastoreo rotacional presentó un valor medio de 60 %, y de 35 % para el pastoreo continuo. Los valores de proteína cruda entre sistemas de pastoreo no fueron diferentes. En cambio hubo diferencias significativas entre especies y épocas, siendo los caprinos quienes colectan mayor cantidad de proteína (P<0.01) con valores altos en verano (12.0 %) y bajos en invierno y primavera (5.3 y 4.3 %, respectivamente). Se determinaron cenizas y fibra detergente ácida y neutra. La diferencia en el número de especies al evaluar la composición botánica entre sistemas de pastoreo fue muy marcada, sin embargo, no se reflejó en el contenido de proteína de la dieta, ya que los valores obtenidos no fueron diferentes entre sistemas de pastoreo. La selectividad de los pequeńos rumiantes jugó un papel importante en este aspecto. [ABSTRACT FROM AUTHOR]
- Published
- 2006
48. Producción de Intermediarios Reactivos de Nitrógeno en cultivo de células mononucleares de cabras expuestas al BCG de M. bovis, suplementadas con 1,25 Dihidroxyvitamina D3
- Author
-
Martínez Romero, Aurora, Rodríguez Martínez, Rafael, Villegas Vizcaíno, Raúl, Robles Trillo, Pedro Antonio, López Pérez, Joel, and Bañuelos Valenzuela, Rómulo
- Subjects
Vacuna BCG de M. bovis, 1,25-Dihidroxyvitamina D3, Nitritos, Nitratos, Cabras ,Nitritos ,Vacuna BCG de M. bovis ,Nitratos ,Cabras ,1,25-Dihidroxyvitamina D3 ,CIENCIAS AGROPECUARIAS Y BIOTECNOLOGÍA - Abstract
"Diferentes estudios han planteado que la exposición a la vacuna bacilo Calmette-Guérin (BCG) de M. bovis altera la respuesta inmune específica, causando un incremento de la respuesta inmune mediada por células Th1 y una estimulación de la respuesta inmune Th2. Se ha planteado que el principio activo de la vitamina D, la 1,25 Dihidroxyvitamina D3 [1,25(OH)2D3] ha resultado ser un potente regulador de la respuesta inmune. El objetivo de este estudio fue evaluar el efecto de la 1,25(OH)2D3 sobre la inducción en la síntesis xii de Intermediarios reactivos de nitrógeno (RNI) en cabras expuestas al BCG de M. bovis. Se planteó un estudio de tipo experimental, longitudinal y comparativo. Se seleccionaron 12 animales de ganado caprino raza sannen, de 20 a 24 meses de edad. Se realizaron cinco muestreos, previo a la inoculación (cero días), 3, 7, 14 y 21 días después de aplicar los tratamientos. Se obtuvieron las células mononucleares por el método Ficoll-Hypaque. Los RNI, nitritos y nitratos (NO2 - y NO3 -) fueron cuantificados por ELISA. El tratamiento con la 1,25(OH)2D3 estimuló la síntesis de NO3 - indicando, que por sí sola es un buen modulador de la replicación micobacterial y en el tratamiento con la vacuna BCG de M. bovis incremento como resultado al tratamiento con 1,25(OH)2 D3. La exposición a la vacuna BCG de M. bovis con el tratamiento con 1,25(OH)2D3 fue capaz de incrementar la respuesta NO2 - y NO3 - en animales expuestos." "Different studies have raised that the exhibition to the M. bovis bacillus Calmette-Guerin (BCG) vaccine alters the specific immune response, it causing an increase of the immune response mediated by Th1 cells and an stimulation of the immune response Th2. Has been considered that the active principle of vitamin D, the 1,25 Dihydroxyvitamin D3 [1,25(OH)2D3], it has turned to be a powerful regulator of the immune response. The aim of this study was to evaluate the effect of the 1,25(OH)2 D3 on the induction in the synthesis of xiv reactive nitrogen intermediates (RNI) in M. bovis BCG-exposed goats. An experimental, longitudinal and comparative study was planned. Twelve animals of goat cattle 20-to 24-month-old sannen selected themselves. Five samplings were made, previous to the inoculation (zero days), 3, 7, 14 and 21 days after applying the treatments. The mononuclear cells by the Ficoll-Hypaque method were obtained. The RNI, nitrites and nitrates (NO2 - and NO3 -) were quantified by ELISA. The treatment with the 1,25(OH)2 D3 stimulated the NO3 - synthesis indicating, that by itself it is a good modulador of the micobacterial replication and in the treatment with M. bovis-BCG vaccine increased like result to the treatment with 1,25(OH)2 D3. The exhibition to M. bovis-BCG vaccine with the treatment with 1,25(OH)2 D3 was able to increase answer NO2 - and NO3 - in exposed animals."
- Published
- 2006
49. [Lead levels in high-risk populations and the surrounding environment in San Ignacio, Fresnillo, Zacatecas, México].
- Author
-
Manzanares-Acuña E, Vega-Carrillo HR, Salas-Luévano MA, Hernández-Dávila VM, Letechipía-de León C, and Bañuelos-Valenzuela R
- Subjects
- Adolescent, Adult, Child, Child, Preschool, Female, Humans, Infant, Lead blood, Male, Mexico, Pregnancy, Risk Factors, Environmental Pollution analysis, Lead analysis
- Abstract
Objective: To determine the lead concentration in the blood of children and nursing or pregnant women from San Ignacio, Fresnillo, in Zacatecas, Mexico as well as in soil, plants, ash and lead-glazed pottery, in order to determine exposure due to a metal-recycling facility., Material and Methods: The study was carried out from December 2004 to April 2005. Lead in blood was measured with anodic stripping voltammetry, while dispersive energy X-ray fluorescence was used in the other matrices., Results: Based upon the criteria outlined in the Official Mexican Standards, 90% of the children was identified as category 1, 5% as category II and another 5% as category III. The soil in the land near the facility contained from 73 to 84,238 microg/g, with an average of 4940 microg/g. Larger lead concentrations were found on sites located closer to the facility. San Ignacio's soil contained, on average, 109 microg/g. High lead levels were found in glazed pottery and the concentration in agricultural crops was greater than 300 microg/g., Conclusions: Although the majority of children in San Ignacio have blood lead concentrations considered to be acceptable according to the Official Mexican Standards, several studies indicate that deleterious effects on children's health exist even at low concentrations. The land around the metal recycling facility is contaminated with lead, and to that extent, the crops that are produced there, once ingested, are a source of contamination, which is compounded by the use of glazed pottery.
- Published
- 2006
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.