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A serological survey was carried out to assess the frequency of leptospirosis, small ruminants lentivirus (SRLV), and brucellosis in small ruminant herds in the Recôncavo Baiano, State of Bahia, Brazil, from February to December 2017. In four goat herds, 125 animals were tested for SRLV and leptospirosis, while in five sheep herds, 378 animals were tested for leptospirosis, brucellosis, and SRLV. Regarding leptospirosis, MAT detected 80% of goats and 15.34% of sheep seroreactive. Reactivity was most frequent to serogroups Autumnalis and Grippotyphosa in goats and sheep, respectively. Regarding SRLV, 8.8% of goats and 0.79% of sheep were reactive. Search for anti-B. ovis antibodies revealed 0.52% reactivity. In sheep, three animals showed simultaneous seroreactivity for SRLV and leptospirosis, while one animal had a serological response for brucellosis and leptospirosis. In goats, simultaneous seroreactivity for SRLV and leptospirosis was observed in only one animal. Leptospirosis was the most frequent of the three infectious diseases in investigated herds.

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diagnosis brucella ovis sorologia leptospira spp reproductive changes animal culture

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Soroepidemiologia de brucelose ovina na microrregião de Feira de Santana, Bahia, Brasil | Seroepidemiology of sheep brucellosis in the microregion of Feira de Santana, BA, Brazil

2013

<p class="MsoNormal">O objetivo do presente trabalho foi a realização de um inquérito soroepidemiológico de Brucella ovis em rebanhos de ovinos da Microrregião de Feira de Santana, Estado da Bahia, Brasil. Foram selecionados os dez municípios de maior efetivo ovino: Antônio Cardoso, Feira de Santana, Ipecaetá, Ipirá, Itatim, Pintadas, Rafael Jambeiro, Santa Teresinha, Santo Estévão e Serra Preta,. O tamanho da amostra foi calculado com base nos parâmetros: nível de significância, 99%; erro amostral, 5%, prevalência estimada, 50%. A amostra total foi fracionada segundo a população de ovinos do respectivo município. Foram examinados 793 animais, machos e fêmeas, com idade superior a seis meses, distribuídos em 49 propriedades dos municípios visitados. Por ocasião das visitas, foi aplicado um questionário epidemiológico destinado à análise de possíveis fatores de risco. Todos os soros foram submetidos ao teste da imunodifusão em gel de ágar (IDGA) com o antígeno constituído por proteínas e lipopolissacarídeos solúveis de B. ovis amostra Reo198. Foram obtidos 6,94% (55/793) de animais positivos e não houve diferença significativa (p>0,05) para idade e sexo. Para as variáveis analisadas, não foram encontrados fatores de risco que pudessem estar associados aos casos de animais reatores positivos. Dentre as propriedades trabalhadas, 61,22% (30/49) apresentaram pelo menos um animal reagente e dos dez municípios visitados, apenas dois não apresentaram animais positivos.</p> | <p class="MsoNormal"><span style="mso-ansi-language: EN-US;" lang="EN-US">The aim of the present study was to perform a seroepidemiological survey of Brucella ovis in ovine flocks in the microregion of Feira de Santana, State of Bahia (BA), Brazil. Ten municipalities with the largest sheep flocks were selected for this survey: Antonio Cardoso, Feira de Santana, Ipecaetá, Ipirá, Itatim, Pintadas, Rafael Jambeiro, Santa Teresinha, Santo Estévão and Serra Preta. The sample size was established on the basis of three parameters: significance level (99%), sampling error (5%), and estimated prevalence (50%). The total sample was divided proportionally to the sheep population found in the respective municipalities. The flocks examined in each municipality were randomly selected. The animals were older than six months and were distributed among 49 properties in the municipalities. Samples of blood from 793 male and female sheep were analyzed. During visitations, an epidemiological questionnaire was applied for collection of information and analysis of possible risk factors. All sera samples were analyzed by agar gel immunodiffusion (AGID) and the antigen was a mixture of soluble proteins and lipopolysaccharides from B. ovis (strain Reo 198). Seropositive animals (6.94%, 55/793) to B. ovis were detected. However, significant statistical difference (p>0.05) was not found for age and sex. Risk factors that might be associated with cases of seropositive animals for the variables analyzed were not found. In 61.22% (30/49) of the examined farms at least one seropositive animal was detected. Only two of the ten municipalities above had no seropositive animal.</span></p>

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brucella ovis fatores de risco idga ocorrência sorologia

Universidade de São Paulo - Brazil

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Venereal shedding of ovine lentivirus in infected rams.

Serological survey of leptospirosis, brucellosis, and lentivirus in herds of small ruminants in Recôncavo Baiano, Bahia, Brazil

Soroepidemiologia de brucelose ovina na microrregião de Feira de Santana, Bahia, Brasil | Seroepidemiology of sheep brucellosis in the microregion of Feira de Santana, BA, Brazil