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5 results on '"Prepubertal inoculation"'

1. Reactivation and Foetal Infection in Pregnant Heifers Infected with Neospora caninum Live Tachyzoites at Prepubertal Age.

Author

Hecker, Yanina P., Burucúa, Mercedes M., Fiorani, Franco, Maldonado Rivera, Jaime E., Cirone, Karina M., Dorsch, Matías A., Cheuquepán, Felipe A., Campero, Lucía M., Cantón, Germán J., Marín, Maia S., Ortega-Mora, Luis M., and Moore, Dadín P.

Subjects
NEOSPORA caninum, HEIFERS, LIVESTOCK losses, ANIMAL young, CONGENITAL disorders
Abstract

Neospora caninum is recognised for causing cattle abortion, provoking severe economic losses in the livestock industry worldwide. The aim of the present study was to evaluate the reactivation and foetal infection in pregnant heifers inoculated with live N. caninum tachyzoites before puberty. A total of 15 30-month-old pregnant heifers were allocated into four groups: animals inoculated with live tachyzoites of NC-Argentina LP1 isolate before puberty and challenged with live tachyzoites of NC-1 strain at 210 days of gestation (DG) (Group A); animals mock inoculated before puberty and challenged with NC-1 strain at 210 DG (Group B), animals inoculated before puberty but not subsequently challenged (Group C); and noninfected and nonchallenged animals (Group D). The results of this study showed that 100% of animals infected before puberty (Groups A and C) suffered reactivation of the infection at the seventh month of gestation. In addition, in three and two calves from Groups A and C, respectively, congenital infection was confirmed. Interestingly, we provide evidence that the use of live N. caninum tachyzoites in young animals as a strategy to induce protection is neither safe nor effective. [ABSTRACT FROM AUTHOR]

Published
2022
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2. Reactivation and Foetal Infection in Pregnant Heifers Infected with Neospora caninum Live Tachyzoites at Prepubertal Age

Author

Yanina P. Hecker, Mercedes M. Burucúa, Franco Fiorani, Jaime E. Maldonado Rivera, Karina M. Cirone, Matías A. Dorsch, Felipe A. Cheuquepán, Lucía M. Campero, Germán J. Cantón, Maia S. Marín, Luis M. Ortega-Mora, and Dadín P. Moore

Subjects
Neospora caninum, bovine, prepubertal inoculation, live parasite, reactivation, safety, Medicine
Abstract

Neospora caninum is recognised for causing cattle abortion, provoking severe economic losses in the livestock industry worldwide. The aim of the present study was to evaluate the reactivation and foetal infection in pregnant heifers inoculated with live N. caninum tachyzoites before puberty. A total of 15 30-month-old pregnant heifers were allocated into four groups: animals inoculated with live tachyzoites of NC-Argentina LP1 isolate before puberty and challenged with live tachyzoites of NC-1 strain at 210 days of gestation (DG) (Group A); animals mock inoculated before puberty and challenged with NC-1 strain at 210 DG (Group B), animals inoculated before puberty but not subsequently challenged (Group C); and noninfected and nonchallenged animals (Group D). The results of this study showed that 100% of animals infected before puberty (Groups A and C) suffered reactivation of the infection at the seventh month of gestation. In addition, in three and two calves from Groups A and C, respectively, congenital infection was confirmed. Interestingly, we provide evidence that the use of live N. caninum tachyzoites in young animals as a strategy to induce protection is neither safe nor effective.

Published
2022
Full Text
View/download PDF

3. Reactivation and Foetal Infection in Pregnant Heifers Infected with Neospora caninum Live Tachyzoites at Prepubertal Age

Author

Hecker, Yanina Paola, Burucúa, Mercedes M., Fiorani, Franco, Maldonado Rivera, Jaime E., Cirone, Karina M., Dorsch, Matías A., Cheuquepán, Felipe A., Campero, Lucía M., Cantón, Germán J., Marín, Maia S., Ortega Mora, Luis Miguel, Moore, Dadín P., Hecker, Yanina Paola, Burucúa, Mercedes M., Fiorani, Franco, Maldonado Rivera, Jaime E., Cirone, Karina M., Dorsch, Matías A., Cheuquepán, Felipe A., Campero, Lucía M., Cantón, Germán J., Marín, Maia S., Ortega Mora, Luis Miguel, and Moore, Dadín P.

Abstract

Neospora caninum is recognised for causing cattle abortion, provoking severe economic losses in the livestock industry worldwide. The aim of the present study was to evaluate the reactivation and foetal infection in pregnant heifers inoculated with live N. caninum tachyzoites before puberty. A total of 15 30-month-old pregnant heifers were allocated into four groups: animals inoculated with live tachyzoites of NC-Argentina LP1 isolate before puberty and challenged with live tachyzoites of NC-1 strain at 210 days of gestation (DG) (Group A); animals mock inoculated before puberty and challenged with NC-1 strain at 210 DG (Group B), animals inoculated before puberty but not subsequently challenged (Group C); and noninfected and nonchallenged animals (Group D). The results of this study showed that 100% of animals infected before puberty (Groups A and C) suffered reactivation of the infection at the seventh month of gestation. In addition, in three and two calves from Groups A and C, respectively, congenital infection was confirmed. Interestingly, we provide evidence that the use of live N. caninum tachyzoites in young animals as a strategy to induce protection is neither safe nor effective., Research Grants from Agencia Nacional de Promoción Científica y Tecnológica y FONCyT, INTA, Depto. de Sanidad Animal, Fac. de Veterinaria, TRUE, pub

Published
2022

4. Reactivation and foetal infection in pregnant heifers infected with neospora caninum live tachyzoites at prepubertal age

Author

Fiorani, Franco, Burucúa, Mercedes María, Hecker, Yanina Paola, Dorsch, Matías Andrés, Cantón, Germán José, Cheuquepan Valenzuela, Felipe Andrés, Marín, Maia Solange, Ortega Mora, Luis Miguel, Prando Moore, Dadín, Campero, Lucía María, Cirone, Karina Mariela, Maldonado Rivera, Jaime Eduardo, Fiorani, Franco, Burucúa, Mercedes María, Hecker, Yanina Paola, Dorsch, Matías Andrés, Cantón, Germán José, Cheuquepan Valenzuela, Felipe Andrés, Marín, Maia Solange, Ortega Mora, Luis Miguel, Prando Moore, Dadín, Campero, Lucía María, Cirone, Karina Mariela, and Maldonado Rivera, Jaime Eduardo

Abstract

Neospora caninum is recognised for causing cattle abortion, provoking severe economic losses in the livestock industry worldwide. The aim of the present study was to evaluate the reactivation and foetal infection in pregnant heifers inoculated with live N. caninum tachyzoites before puberty. A total of 15 30-month-old pregnant heifers were allocated into four groups: animals inoculated with live tachyzoites of NC-Argentina LP1 isolate before puberty and challenged with live tachyzoites of NC-1 strain at 210 days of gestation (DG) (Group A); animals mock inoculated before puberty and challenged with NC-1 strain at 210 DG (Group B), animals inoculated before puberty but not subsequently challenged (Group C); and noninfected and nonchallenged animals (Group D). The results of this study showed that 100% of animals infected before puberty (Groups A and C) suffered reactivation of the infection at the seventh month of gestation. In addition, in three and two calves from Groups A and C, respectively, congenital infection was confirmed. Interestingly, we provide evidence that the use of live N. caninum tachyzoites in young animals as a strategy to induce protection is neither safe nor effective.

Published
2022

5. Reactivation and foetal infection in pregnant heifers infected with Neospora caninum live tachyzoites at prepubertal age

Author

HECKER, Y. P., BURUCÚA, M. M., FIORANI, F., MALDONADO RIVERA, J. E., CIRONE, K.M., DORSCH, M., CHEUQUEPÁN, F. A., CAMPERO, L. M., CANTÓN, G. J., MARÍN, M. S., ORTEGA-MORA, L. M., and MOORE, D. P.

Subjects
Efficacy, Neospora caninum, Vertical transmission, PLATAFORMA DE INVESTIGACIÓN EN SALUD ANIMAL, Bovine, Live parasite, Safety, Prepubertal inoculation, Reactivation, PLATAFORMA SALUD ANIMAL
Abstract

Neospora caninum is recognised for causing cattle abortion, provoking severe economic losses in the livestock industry worldwide. The aim of the present study was to evaluate the reactivation and foetal infection in pregnant heifers inoculated with live N. caninum tachyzoites before puberty. A total of 15 30-month-old pregnant heifers were allocated into four groups: animals inoculated with live tachyzoites of NC-Argentina LP1 isolate before puberty and challenged with live tachyzoites of NC-1 strain at 210 days of gestation (DG) (Group A); animals mock inoculated before puberty and challenged with NC-1 strain at 210 DG (Group B), animals inoculated before puberty but not subsequently challenged (Group C); and noninfected and nonchallenged animals (Group D). The results of this study showed that 100% of animals infected before puberty (Groups A and C) suffered reactivation of the infection at the seventh month of gestation. In addition, in three and two calves from Groups A and C, respectively, congenital infection was confirmed. Interestingly, we provide evidence that the use of live N. caninum tachyzoites in young animals as a strategy to induce protection is neither safe nor effective. © 2022 by the authors.

Published
2022

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