A case–control study of risk factors for brucellosis seropositivity in Portuguese small ruminants herds

Coelho, AM; Coelho, Ana Carolina Barreto; Roboredo, M.; Rodrigues, Jorge

doi:10.1016/j.prevetmed.2007.06.001

Cited by 32 publications

(32 citation statements)

References 26 publications

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“…The results of this study are in agreement with previous studies, where brucellosis was associated with large herd size (Kabagambe et al 2001, Al-Majali 2005, Coelho et al 2007. Larger herds were more likely to have at least one positive goat than smaller herds and were usually associated with mass management practices that are typically more difficult to control and allow for closer contact between animals and their environment, which increases the potential for exposure to infectious excretions (Al-Majali 2005).…”

Section: Discussionsupporting

confidence: 91%

“…This is the first epidemiological study that describes seroprevalence of brucellosis in Northeast of Portugal and there are few recent epidemiological studies conducted in Europe (Lithg-Pereira et al 2004, Coelho et al 2007. The aim of this study was to characterize the sheep and goat brucellosis prevalence by herd size, species, constitution of the herd and type of production, using used only animals and flocks with this information properly registered.…”

Section: Discussionmentioning

confidence: 99%

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Seroprevalence of sheep and goat brucellosis in the northeast of Portugal

Coelho

Rodrigues

2013

Arch. med. vet.

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RESUMENSe realizó una encuesta para estimar la seroprevalencia de brucelosis ovina y caprina en la región de Trás-os-Montes e Alto Douro, al noreste de Portugal. En total fueron analizados 278.097 pequeños rumiantes distribuidos en 5.466 rebaños pertenecientes a 13 organizaciones de Ganaderos (OPP) fueron analizados. Cuatrocientos ochenta y siete (8,9%) rebaños tenían uno o más animales serológicamente positivos, con valores que oscilaban entre 8,2% y 9,7%. La prevalencia individual fue de 0,44% (IC 95% 0,40-0,48%). No se detectaron diferencias estadísticamente significativas asociadas al tamaño de los rebaños, las especies, la constitución del rebaño, el tipo de producción y la OPP. Basándose en los resultados de esta encuesta, un pequeño porcentaje de animales y un alto porcentaje de los rebaños en el noreste de Portugal fueron serológicamente positivos. Dada la escasez de estudios epidemiológicos sobre la brucelosis en el norte de Portugal, la información sobre la seroprevalencia obtenida en este estudio es importante a la hora de definir medidas de control de la brucelosis en la zona.Palabras clave: Brucella melitensis, pequeños rumiantes, epidemiología, seroprevalencia. SUMMARYA survey to estimate the seroprevalence of ovine and caprine brucellosis was conducted in the region of Trás-os-Montes e Alto Douro, Northeast of Portugal. In total, 278,097 small ruminants and 5,466 flocks from 13 Livestock Farmers Organizations (OPP's) were analysed. Four hundred and eighty seven (8.9%) flocks had one or more serologically positive animals with values ranging between 8.2% and 9.7%. The individual seroprevalence was 0.44% (CI 95% 0.40-0.48%). There were significant differences in seroprevalence rates among herd sizes, species, constitution of herd, production's type and OPP. Based on the results of this survey, a small percentage of animals and a high percentage of flocks in the Northeast of Portugal were serologically positive. Considering the paucity of epidemiological reports on brucellosis in the Northeast of Portugal the information on seroprevalence provided in this study is necessary to define control measures for brucellosis in the area.

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Section: Discussionsupporting

confidence: 91%

Section: Discussionmentioning

confidence: 99%

Seroprevalence of sheep and goat brucellosis in the northeast of Portugal

Coelho

Rodrigues

2013

Arch. med. vet.

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“…In a study in Chainat Province, 20.3% of meat goat farms also shared bucks [17]. In Portugal and Spain, 53.3% and 67.9% of small ruminant herds used communal pasture [3], [15]. All these statistics were lower than those of our study.…”

Section: Discussioncontrasting

confidence: 83%

Goat farm management and Brucella serological test among goat keepers and livestock officers, 2011–2012, Nakhon Si Thammarat Province, southern Thailand

Te-chaniyom

Geater

Kongkaew³

et al. 2016

One Health

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Brucellosis, a zoonotic disease particularly affecting goats, emerged in Thailand in 2003, resulting in both an occupational hazard for goat keepers and livestock officers, and production losses. Farm management practices have been identified as risk factors associated with Brucella sero-positivity in many studies. Our finding in this study should be considered in order to strengthen the system of biosecurity control in farm animals as one health approach. The objectives of the study were to describe the distribution of potential risk factors by types of goat farms and to document the prevalence of human Brucella sero-positivity among goat keepers and livestock officers in Nakhon Si Thammarat, Thailand.A cross-sectional study was conducted from September to December 2012. The study population included three types of goat farms: standard, community enterprise and private goat farms that were located in Nakhon Si Thammmarat Province in southern Thailand. Information on whether the farm had any Brucella sero-positivity goats since 2011 was retrieved from the local livestock office records. Information on farming management was also traced back to 2011. Field researchers collected information from goat keepers of the selected farms using a structured questionnaire. Goat keepers on all farms pre-identified (January to June 2012) as having had at least one positive goat were considered to have been exposed. Goat keepers on a random sample of farms having all goats with negative results were considered to be unexposed. Venous blood samples were collected from goat keepers exposed and unexposed and from livestock officers and the samples were tested by IgG ELISA. Statistical analysis was done under the complex survey design in R software.Fourteen standard farms, 66 community enterprise farms and 68 private farms participated in the study; 82.4% (122/148) used public pasture and 53.4% (79/148) shared breeder goats with other farms. Farm management practices corresponding to pre-identified risk factors were more common in private farms. Large herd size (≥ 51 goats) and having dogs and/or rats on the farm were significantly associated with Brucella infection in animals (P < 0.05). Similar proportions of goat keepers in positive goat farm and livestock officers were positive for Brucella antibody (8.3% and 8.8% respectively).Several goat farming management practices in the study area may increase the risk of Brucella infection in animals. Livestock officers in the area have a high risk of being infected with Brucella. Improving goat farm biosecurity practices in needed to reduce the risk of brucellosis in this area.

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“…Esses resultados são justificáveis, pois a castração reduz o número de machos sexualmente ativos, reduzindo o número de parceiros sexuais e, consequentemente, mitigando o risco de transmissão venérea (8) , enquanto a realização de exame de B. ovis permite a adoção do descarte orientado e reduz o risco de introdução de animais infectados (14,18,19) .…”

Section: Resultsunclassified

“…Como fatores associados à infecção por B. Ovis, pode ser observado o tamanho do rebanho (rebanhos grandes), rebanhos sem lugares com água limpa, remoção de esterco insuficiente e limpeza inadequada de instalações, introdução de animais de rebanhos não-livres de bruceloses ou de rebanhos de status desconhecido (14) , aptidão produtiva (15) , compartilhamento de pastos com outros ruminantes (16,17) , empréstimo de ovinos durante estação reprodutiva, contato com outros rebanhos de ovinos (17) e aquisição de animais e higiene anual das instalações (18) . Por outro lado, como fatores associados à proteção têm-se a frequente higiene das instalações (19) e a idade dos criadores (mais velhos) (14) .…”

Section: Introductionunclassified

Brucella ovis EM OVINOS: SOROPOSITIVIDADE E FATORES DE RISCO

et al. 2017

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ResumoRealizou-se um levantamento sorológico de Brucella ovis em ovinos do Estado de Sergipe, com o objetivo de determinar a positividade e a distribuição da infecção em propriedades rurais e analisar os possíveis fatores associados à infecção. Foram analisadas 54 propriedades criadoras de ovinos, das quais foram colhidas 932 amostras de soro sanguíneo de animais com idade superior a seis meses, nas três regiões do Estado. Todos os soros foram examinados por Imunodifusão em Gel de Agar (IDGA). De acordo com o teste realizado, 46,30% (25/54) das propriedades apresentaram evidência sorológica de infecção por B. ovis, com uma positividade de 4,40% (41/932) dos animais. Como fatores associados à infecção por B. ovis, observaram-se a presença de tratador de ovinos (OR=2,31) e propriedades com área superior a 50 ha (OR=1,98) e como fator de proteção, a utilização de cabanha (OR=0,37). Assim, verificou-se a presença de anticorpos contra Brucella ovis nos ovinos do Estado e salienta-se a importância de estudos complementares para determinação de medidas sanitárias específicas para prevenir os rebanhos desta enfermidade. Palavras-chave:Brucelose; doença; epididimite ovina. AbstractSeroepidemiological study of Brucella ovis in sheep from Sergipe State was carried out to determine the seropositivity and infection distribution in rural properties and possible factors associated with infection. A total of 54 sheep properties were studied and 932 blood serum samples from animals older than six months were collected in the three regions of Sergipe State. All sera samples were examined by agar gel immunodiffusion (AGID). According to the serological tests, 46.30% (25/54) of the properties had serologic evidence of infection by B. ovis, with 4.40% of positive animals (41/932). Presence of sheep handler (OR=2.31) and properties with an area bigger

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A case–control study of risk factors for brucellosis seropositivity in Portuguese small ruminants herds

Cited by 32 publications

References 26 publications

Seroprevalence of sheep and goat brucellosis in the northeast of Portugal

Seroprevalence of sheep and goat brucellosis in the northeast of Portugal

Goat farm management and Brucella serological test among goat keepers and livestock officers, 2011–2012, Nakhon Si Thammarat Province, southern Thailand

Brucella ovis EM OVINOS: SOROPOSITIVIDADE E FATORES DE RISCO

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