| Autor: |
Marcos Luna, Juan Encina, Perpetuo Álvarez, José Eduardo García, Ulises Macías-Cruz, Leonel Avendaño-Reyes, Miguel Mellado |
| Rok vydání: |
2022 |
| Předmět: |
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| DOI: |
10.21203/rs.3.rs-1340603/v1 |
| Popis: |
This retrospective study aimed to estimate the seroprevalence of bovine brucellosis (bBR) in high-yielding Holstein heifers and identify risk factors associated with seropositivity to this disease. An additional aim was to assess the heifer-related risk factors for abortion. This study was carried out on a commercial dairy farm in northern Mexico (25° N) using 3848 heifers from 2018 to 2021. The seroprevalence of bBR was 30% (95% CI = 29–32%) for lactating heifers (card test). Multiple logistic regression models indicated that heifers with > 680 kg at calving had half the risk of being positive to bBR than heifers with vs. 36.1%). Heifers suffering from diarrhea during the growing period were 1.3 times more likely to be seropositive to bBR than heifers not diagnosed with this disease (34.1 vs. 29.4%; P vs. 26.3%). Heifers vaccinated with two doses of commercial vaccines against brucellosis were associated (P vs. 16.2%; P |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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