Serological evidence and spatial analysis of small ruminant lentiviruses in herds in Maranhão, Brazil

Abstract

Caprine arthritis encephalitis and Maedi-Visnaare lentiviruses affecting goats and sheep, respectively. Despite the literature having studies about these diseases, there is a constant demand and the need to study the health status of flocks that exploit economically. Therefore, this study aimed to assess the frequency of small ruminant lentiviruses explored in regional locations of Chapadinha and Itapecuru Mirim, that compose the microregion of Low Parnaíba, Maranhão, Brazil, as well as analyze the spatial distribution of outbreaks in the studied regions. Therefore, 241 properties were visited, where blood was collected in 1150 sheep and 1260 goats and tested by agar gel immunodiffusion (AGID). Epidemiological questionnaire was applied and collected the geographic coordinates. There was a low frequencyfor lentivirus, with 0.39% (5/1260) of goats and 0.08% (1/1150) of sheep. Regarding the spatial analysis, the reagent flocks were distributed in strategic cities for commercialization throughout the microregion. There was a low occurrence of lentiviruses.The municipalities of Cantanhede and Pirapemas of the regional of Itapecuru Mirimand Brejo and Magalhães de Almeida had reagent flocks for CAE. Whereas the municipality of Matões do Norte presented flock reagent to Maedi-Visna, this belonging to the regional of Chapadinha.

>b<Estudo dos diferentes genótipos de lentivírus de pequenos ruminantes no Brasil e sua relação com manifestações clínicas>/b<

“…Os rebanhos que eram constituídos pela raça Saanen apresentaram 8,37 vezes mais chances de apresentarem animais soropositivos quando comparado com animais SRD (IC95%=2,45-28,61; p=0,001). Os caprinos e ovinos sem padrão racial definido são menos susceptíveis a infecção do que animais de raças puras (MELO; FRANK, 1997;ALVES, 2001;CASTRO et al, 2002b;PINHEIRO et al, 2004;SILVA et al, 2017;ALVES et al, 2017;SOARES et al, 2020). As raças caprinas puras especializadas na produção de produção de leite também apresentam maior grau de infecção por LVPR (PINHEIRO; GOUVEIA; ALVES, 2001;PINHEIRO et al, 2018;TEIXEIRA et al, 2016).…”