Reproductive losses associated with bacterial and protozoan infections in cattle herds from Corrientes province
The aim of the present study was to determine the association between serological status and the causes of abortion related to bacterial and protozoan infections in three livestock farms with low reproductive performance in Corrientes province, Argentina. During 2020-2021, preputial scraping of bull...
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| Autores principales: | , , , , |
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| Formato: | Artículo revista |
| Lenguaje: | Español |
| Publicado: |
Universidad Nacional del Nordeste
2026
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| Materias: | |
| Acceso en línea: | https://revistas.unne.edu.ar/index.php/vet/article/view/9047 |
| Aporte de: |
| Sumario: | The aim of the present study was to determine the association between serological status and the causes of abortion related to bacterial and protozoan infections in three livestock farms with low reproductive performance in Corrientes province, Argentina. During 2020-2021, preputial scraping of bulls, pregnancy diagnosis by transrectal ultrasound in cows, and collection of aborted fetuses were performed. Blood samples from pregnant, non-pregnant and aborted cows were analyzed for Leptospira spp., Neospora caninum and Brucella abortus antibodies. In addition, cervicovaginal mucus (CVM) samples were collected from aborted cows for culture. Five percent of the bulls were positive for Tritrichomonas foetus and 7% for Campylobacter fetus (locality 1). Among 546 sera analysed, 1.8% (10/546; 95% CI 1-3) were positive for Leptospira spp., showing a significant association between high seroprevalence and non-pregnant females (p = 0.0174). For N. caninum, the seroprevalence was 49.1% (268/546 95% CI 45-54), showing a statistically significant association between seropositivity and pregnant females (p = 0.0151). Of 14 aborted females monitored, 42.8% became seropositive to N. caninum, suggesting horizontal transmission, a finding of notable importance. All animals were seronegative for B. abortus. Furthermore, T. foetus (3/61) and C. fetus (3/61) were isolated from 9.8% (6/61) of CVM samples, and infectious agents were identified as the cause of abortion in 42.9% (3/7) of the fetuses. This study provides insight into infectious causes of reproductive losses in extensive cattle herds in the Argentine Mesopotamia, highlighting the importance of venereal disease in bulls and the need for sampling of aborted cows and fetuses to identify causes of reproductive failure. |
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