| Autor: |
Rahularaj R; Postgraduate Institute of Agriculture, University of Peradeniya, Peradeniya, 20400, Sri Lanka., Deshapriya RMC; Department of Animal Science, Faculty of Agriculture, University of Peradeniya, Peradeniya, 20400, Sri Lanka. cdeshapriya@pdn.ac.lk., Ranasinghe RMSBK; Department of Basic Veterinary Sciences, Faculty of Veterinary Medicine and Animal Science, University of Peradeniya, Peradeniya, 20400, Sri Lanka. |
| Jazyk: |
angličtina |
| Zdroj: |
Tropical animal health and production [Trop Anim Health Prod] 2019 Nov; Vol. 51 (8), pp. 2413-2419. Date of Electronic Publication: 2019 Jun 11. |
| DOI: |
10.1007/s11250-019-01957-4 |
| Abstrakt: |
A study was carried out to identify prevalence and risk factors for bovine subclinical mastitis (SCM) in crossbred lactating cows within the Kurunagala district of Sri Lanka. In this study, 283 crossbred cows (Jersey x Shahiwal) from randomly selected medium- and relatively large-scale dairy farms were screened for SCM. The Californian mastitis test (CMT) plus microbiological analyses were employed for screening. A pre-tested questionnaire was used to collect information on the cows and their management. When screening was based only on CMT, the prevalence of SCM was 49%, and it was 44% if based on both CMT and pathogen isolation. The isolated pathogens were Staphylococcus spp. (80%, 98/123), Escherichia coli (14%, 17/123), Streptococcus spp. (3%, 4/123) and Pasteurella multocida (3%, 4/123). The age, parity and milk yield showed positive correlations with SCM (p < 0.05). The prevalence of SCM was relatively high after the fifth parity (p = 0.03, odds ratio = 9.49). A positive correlation of increase in calving interval (more than 18 months) with SCM was observed. The prevalence of SCM on the dairy farms can be reduced by implementing more hygienic management practices. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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