Seroprevalence of Brucella ovis in rams and associated flock level risk factors in the state of Rio Grande do Sul, Brazil.
Prev Vet Med
; 121(1-2): 183-7, 2015 Sep 01.
Article
em En
| MEDLINE
| ID: mdl-26092724
ABSTRACT
A cross-sectional study based on a planned probabilistic sampling was carried out to estimate animal and flock prevalence of Brucella ovis in rams, as well as to determine risk factors at the flock level. Data regarding the flocks were collected by means of a questionnaire applied on 705 farms in the state of Rio Grande do Sul, Brazil, using one-stage cluster sampling. From the 705 flocks, 20 (2.5%, CI95% 2.0-3.1%) had at least one positive ram. At the animal level, out of 1800 rams, 52 were positive (2.89%, CI95% 0.4-5.3%). Statistical analysis identified the following as risk factors average age of rams in the flocks (PR 1.99, CI95% 1.19-3.32); farms larger than 5 km(2) (500 ha) on extension area (PR 7.46CI95% 2.03-27.43); and the lack of lambing paddocks (PR 5.56, CI95% 1.70-18.11). This study provided relevant information for authorities to elaborate plans for the first Brazilian state based B. ovis disease control and eradication program. To the authors' knowledge, this is the first study that shows the importance of lambing paddocks in order to keep pre-lambing and lambing ewes away from the rest of the flock, the lack of this infrastructure was considered an important risk factor for B. ovis.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Doenças dos Ovinos
/
Brucelose
/
Brucella ovis
Tipo de estudo:
Etiology_studies
/
Observational_studies
/
Prevalence_studies
/
Prognostic_studies
/
Risk_factors_studies
Limite:
Animals
País/Região como assunto:
America do sul
/
Brasil
Idioma:
En
Revista:
Prev Vet Med
Ano de publicação:
2015
Tipo de documento:
Article