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With the purpose of diagnosing the presence of possible causes of reproductive losses, 4 groups of breeding females were surveyed and formed after the mated period ended in 5 beef cow-calf ranches (BCR) of Salta province. The groups in each BCR were: PC, pregnant cows (n=15), PH, pregnant heifers (n=15), NPC, no pregnant cows (n=10) and NPH, no pregnant heifers (n=10). At pregnancy diagnosis, body condition (BC) was recorded and females were sampled for diagnosis of brucellosis, bovine viral diarrhea virus (BVD), bovine herpesvirus 1, infectious bovine rhinotracheitis (IBR), neosporosis and leptospirosis. Blood Se values and serum Cu, Zn, Mg Ca and thyroxine (T4) were determined. In the 5 BCRs, a greater (p<0.05) BC was found in the PC than in the NPC. No venereal diseases were diagnosed in the bulls. The prevalence and/or serum titers for the infectious diseases investigated were generally low, with no differences between groups, except in 2 BCRs where the seroprevalence of antibodies to Neospora caninum was higher (p<0.01) in NPC than in PC. Se, Ca, Mg and T4 values were normal and did not show differences between groups, but in one BCR there were animals with marginal Se values. With the exception of one BCR, groups had marginal Cu deficiencies. Three BCR presented marginal levels of Zn. These results indicate the probable importance of diet, micromineral deficiencies and neosporosis and encourage further studies to improve the reproductive rates. [ABSTRACT FROM AUTHOR]

The text presents information about the 11th TAURUS Conference on bovine reproduction, which will take place on September 7th and 8th, 2023, at the Juan Pablo II auditorium of UCA, in Puerto Madero, CABA. The program includes panels on tools for the andrological examination of bulls, strategies to increase the response in IATF protocols in dairy cows, effective management of vaccination against viral diseases that affect reproduction, and the effectiveness of the RB51 vaccine in controlling bovine brucellosis. The registration fees and the location of the event are also mentioned. [Extracted from the article]

The article presents a study on the production of serum antibodies in response to vaccination against bovine infectious rhinotracheitis (IBR) and bovine viral diarrhea (BVD) viruses in dairy cows under subtropical conditions. A commercial polyvalent vaccine with inactivated BVD viruses and modified live IBR viruses was used. The results showed that vaccination induced the formation of antibodies against IBR, but not against BVD. The study was conducted in a dairy herd in Mexico and it was concluded that further research is necessary to control the transmission of these diseases. [Extracted from the article]

Bovine viral diarrhea virus (BVDV) is one of the major agents involved in bovine respiratory disease and in the reproductive complex which leads to significant economic losses worldwide. To improve decision-making and address the best control strategy for this virus, it is important to know the viral circulation in each production facility. In the following work, data collected in different livestock establishments. In the 15 establishments analyzed, evidence of viral circulation was found with a general herd prevalence of 67% (maximum prevalence of 93% and a minimum of 33%). This work demonstrates the importance of knowing the health status of the herd to improve decision-making on herd and farm management measures. [ABSTRACT FROM AUTHOR]

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Bovine viral diarrhea (BVD) is an infectious pathology generated by a pestivirus of worldwide distribution, which causes reproductive problems and economic losses. The objective of this study was to establish bovine viral diarrhea virus (BVDV) positivity in cows from the municipality of Tuta (Boyacá, Colombia), and to analyze age and racial groups and reproductive and management variables as possible risk factors. A total of 374 blood samples were taken and the indirect ELISA test was performed using the Serelisa® BVD p80 Ab Mono Blocking kit; the data were processed with EpiInfo®. A seroprevalence of 41.7% was found. Crossbreds and cattle >4 years had the highest seroprevalence. Animals >4 years old (p= 0.0000001922) were statistically associated with the presence of the disease and were considered a risk factor for BVDV. Control and prevention programs should be established to hinder its dissemination in the area. [ABSTRACT FROM AUTHOR]

Copyright of Revista Veterinaria is the property of Universidad Nacional del Nordeste 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.)

The article focuses on the evaluation of the ability of a vaccine directed against Bovine Viral Diarrhea Virus (BVDV) to confer passive and active immunity in calves. It mentions vaccinating females in the last third of gestation is the best strategy to achieve the production of colostrum with high levels of antibodies against the main disease-causing agents in the first weeks of life.

The article titled "Prevalence of bovine viral diarrhea, bovine infectious rhinotracheitis, and bovine viral leukemia in sheep and goats in La Media Guajira 2021 - 2022" reports on the prevalence of these diseases in sheep and goats in the La Media Guajira region. A total of 1300 blood samples were collected from sheep and goats in different municipalities, and specific antibodies against pestivirus, herpesvirus, and retrovirus were detected. The obtained prevalence was 5% for bovine viral diarrhea, 68% for bovine infectious rhinotracheitis, and 27% for bovine viral leukemia. It is concluded that the goat population showed a higher antibody specificity. [Extracted from the article]

El Virus de la Diarrea Viral Bovina (VDVB) es un patógeno que afecta los hatos bovinos. El virus ha sido clasificado en dos biotipos (citopático y no citopático) y en 3 genotipos (1, 2 y 3) según su secuencia nucleotídica. El propósito de este estudio fue determinar la presencia del VDVB genotipo 2 (VDVB-2) en Colombia, mediante el estudio de cuatro zonas representativas de producción ganadera por medio de RT-PCR en muestras de suero y cartílago de oreja. Para ello, se recolectaron los sueros preparto de 379 hembras , precalostrales (antes de que se les diera calostro) de 274 terneros nacidos de estas hembras, y 145 de terneros 25 días post-nacimiento. Adicionalmente, se tomaron 181 biopsias de cartílago de oreja de estos terneros. Se realizó RT-PCR a todas las muestras para determinar la presencia o ausencia del VDVB. Aquellas muestras que resultaron positivas se evaluaron adicionalmente mediante dos métodos para determinar su genotipo: a) una nueva RT-PCR con primers específicos para el VDVB-2, y b) una PCR diferente con la que se obtuvo un producto de 296 pb, el cual se sometió a digestión enzimática. Los resultados mostraron que 17 (4,48%) muestras de suero preparto fueron positivas para Pestivirus, de las cuales 6 correspondieron al VDVB-2 (1,58%). Ninguna de las muestras de suero obtenidas de los terneros resultó positiva para el VDVB-2. Finalmente, 18 (9,9%) biopsias de cartílago de oreja fueron positivas al VDVB, 14 (7,7%)de las cuales resultaron positivas para el VDVB-2. El presente estudio es la primera evidencia documentada de la presencia del VDVB-2 en bovinos de Colombia. [ABSTRACT FROM AUTHOR]

The article provides information on the cattle viruses, focusing on Bovine viral diarrhea virus causing respiratory, reproductive and gastrointestinal problems. Topics include vaccination of infected cattle, biosecurity measures preventing virus and vaccine against the cytoskeletal proteins, main neutralizing antigen.

Copyright of Revista de Investigaciones Veterinarias del Peru is the property of Universidad Nacional Mayor de San Marcos (UNMSM) 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.)

Copyright of Revista de Investigaciones Veterinarias del Peru is the property of Universidad Nacional Mayor de San Marcos (UNMSM) 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.)

Copyright of Revista de Investigaciones Veterinarias del Peru is the property of Universidad Nacional Mayor de San Marcos (UNMSM) 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.)

Copyright of Revista Veterinaria is the property of Universidad Nacional del Nordeste 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.)