Soroprevalência de Maedi-Visna em ovinos na região de Araçatuba, SP

Lombardi, Adriana Longo; Nogueira, A. H. C.; Feres, F; Paulo, H. P.; Castro, Roberto Soares de; Feitosa, Francisco Leydson Formiga; Cadioli, Fabiano Antônio; Peiró, Juliana Regina; Perri, Sílvia Helena Venturoli; Lima, Vera Fernanda Martins Hossepian de; Mendes, Luiz Cláudio Nogueira

doi:10.1590/s0102-09352009000600025

Cited by 16 publications

(13 citation statements)

References 4 publications

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“…Lentiviruses are present in several Brazilian states (MARQUES, 2006;LOMBARDI et al, 2009;MAZZINGHY, 2013). Reports on lentiviruses in goats are more common in Brazil compared to those in sheep herds (OLIVEIRA et al, 2006;EMBRAPA, 2012).…”

Section: Resultsmentioning

confidence: 99%

Seroepidemiological study of maedi-visna in sheep in Ceara, Rio Grande do Norte, Paraíba, and Sergipe States

Alves

Teixeira

Pinheiro

et al. 2018

SCA

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The production performance of a livestock herd can be compromised by various diseases. In sheep, maedi-visna (MV) infections, which have a chronic nature, are caused by a virus (maedi-visna virus (MVV)) belonging to the genus Lentivirus of the Retroviridae family. The infection can cause significant economic losses and has considerable health impacts on sheep breeding in production systems. Due to the importance of this disease in sheep flocks, the objective was to conduct a serosurvey of MVV in the states of Ceará (CE), Rio Grande do Norte (RN), Paraíba (PB), and Sergipe (SE). A total of, 3332 serum samples were collected in the four states, 1011 in CE, 931 in RN, 459 in PB, and 931 in SE, with the number of samples proportional to the actual herd size of each state. The samples were analyzed using the agar gel microimmunodiffusion test (AGID). Reproducers were revaluated using western blotting (WB). In addition to this serological survey, we administered an investigative questionnaire to identify possible risk factors that facilitate the introduction and spread of diseases (location, category, sex, breed type, creation system, production, herd size, and association with goats). After analysis of the sera using the AGID test, there was zero prevalence. Revaluating breeders by WB revealed a 5.5% prevalence of MV in the four states studied, with prevalences for the states of CE, RN, Paraiba, and SE of 2.3% (2/88), 10.4% (8/77), 3.6% (1/28), and 4.7% (2/42), respectively, corresponding to 13 breeders containing antibodies to the virus. These findings emphasized that the choice of diagnostic tests is extremely important for the early detection of seropositive animals and thus the prevention of the spread of the virus among herds in the region.

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Section: Resultsmentioning

confidence: 99%

Seroepidemiological study of maedi-visna in sheep in Ceara, Rio Grande do Norte, Paraíba, and Sergipe States

Alves

Teixeira

Pinheiro

et al. 2018

SCA

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“…Quanto ao sexo dos ovinos soropositivos, 0,5% (IC95%:0-2,70%) eram machos e 0,8% (IC95%:0,4-1,4%) fêmeas, não havendo diferença significativa (P>0,05) (Tabela 2), assim como observado por outros autores em estudos de rebanhos nacionais (Oliveira et al, 2006;Sobrinho et al, 2008;Lombardi et al, 2009). Informações de que fêmeas permanecem mais tempo nas criações do que os machos destinados ao abate e que reprodutores são mantidos separados ou ainda possam ser emprestados a outros criatórios para a monta, não influenciaram na predisposição da infecção pelo MVV.…”

Section: Resultsunclassified

Soroprevalência de Maedi-visna em rebanhos ovinos do estado do Maranhão, Brasil

Teixeira

Nascimento

et al. 2016

RBCV

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Apesar de ter sido relatada em vários estados, não há informação sobre o Vírus da Maedi Visna (MVV) no Maranhão, e com o crescimento de sua ovinocultura, aumenta o fluxo de animais de outras regiões. Com isso objetivou-se determinar a soroprevalência do MVV em rebanhos ovinos das três principais mesorregiões produtoras do estado do Maranhão, através da pesquisa das 1.495 amostras sanguíneas de ovinos, com idade superior a seis meses, pertencentes a 83 rebanhos de 23 municípios das mesorregiões Cento, Leste e Norte. O diagnóstico sorológico da infecção pelo vírus MVV foi realizado por meio do teste de imunodifusão em gel de ágar (micro-IDGA). Constatou-se uma prevalência geral de 0,7% (IC95%:0,4-1,3%) de ovinos soropositivos e prevalências nas mesorregiões Centro, Leste e Norte de 0

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“…No Brasil, anticorpos contra o MVV foram diagnosticados em ovinos nos estados do Rio Grande do Sul (Dal Pizzol et al, 1989;Ribeiro, 1993), Paraná (Sotomaior;Milczewski, 1997), Rio Grande do Norte (Da Silva, 2003), Ceará (Araújo et al, 2004), Pernambuco (Oliveira et al, 2006), Tocantins (Moura Sobrinho et al, 2008), Bahia (Martinez et al, 2009), Espírito Santo (Barioni et al, 2009) e São Paulo (Lombardi et al, 2009 (Fig. 1), representando 78,23% dos ovinos do Estado, cerca de 193.800 animais (Sergipe, 2007).…”

Section: Introductionunclassified

“…A ocorrência de Maedi-Visna observada no presente trabalho (0,11% -1/941) foi mais baixa que as relatadas em rebanhos ovinos do Rio Grande do Sul (10,5% : Dal Pizzol et al, 1989;19,0%: Ribeiro, 1993), Rio Grande do Norte (21,3%: Da Silva, 2003), São Paulo (2,7%: Lombardi et al, 2009), Tocantins (0,9%: Moura Sobrinho et al, 2008 e Bahia (0,5%: Souza et al, 2007;0,3%: Martinez et al, 2009). Porém, foi superior ao resultado encontrado em Botucatu, SP, de 0,0% (Rosa et al, 2009).…”

Section: Introductionunclassified

Ocorrência de anticorpos contra o vírus Maedi-Visna em ovinos Santa Inês, no Estado de Sergipe, Brasil

et al. 2013

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Small Ruminant Lentiviruses (SRLV) are infectious diseases of viral etiology caused by retroviruses, characterized for being a slowly progressive degenerative disease. The aim of this study was to determine the occurrence of antibodies against lentivirus in the flock of Santa Inês sheep in Sergipe, Brazil. A minimum number of samples was analyzed by the Astudillo calculation, with an expected prevalence (p) of 10%, error rate (α) of 20% and confidence level of 95% (g = 1.96) obtaining the minimum number of samples (n) of 861. Finally, 941 serum samples were collected, derived from 54 properties and 19 municipalities distributed in three regions of the State, and the number of collected samples was proportional to the sheep flock of each municipality. The serum was placed at -20°C until the Agar Gel Immunodiffusion test (AGID), and results considered as positive or suspicious in AGID were assessed by the Western blotting technique. Out of sampled animals, 194 (20.62%) were male and 747 (79.38%) were female. From the stratification by age, 300 were young sheep (31.88%), aged between six months and one year old, 308 (32.73%) were young adults, aged between 1 and 3 years old, and 333 (35.39%) were estimated to be older than three years old. Results showed that antibodies against the Maedi-Visna virus in the sheep flock occurred in the State of Sergipe at low frequency (0.11%). Thus, the occurrence of Maedi-Visna infection in sheep in the State of Sergipe is reported, and emphasizes the participation of the transit of animals in the epidemiology of the disease. trados, 194 (20,62%) eram machos e 747 (79,38%) eram fêmeas. Quanto à estratificação por idade, 300 ovinos eram jovens (31,88%), entre seis meses e um ano, 308 (32,73%) eram jovens adultos, entre 1 e 3 anos, e 333 (35,39%) tinham idade estimada superior a 3 anos. Os resultados obtidos demonstraram que anticorpos contra o vírus Maedi-Visna (MVV) ocorrem no rebanho ovino do estado de Sergipe em baixa frequência (0,11%). Assim, relata-se a ocorrência da infecção por Maedi-Visna em ovinos no estado de Sergipe e ressalta--se a participação do trânsito de animais na epidemiologia da doença. KEYWORDS

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Soroprevalência de Maedi-Visna em ovinos na região de Araçatuba, SP

Cited by 16 publications

References 4 publications

Seroepidemiological study of maedi-visna in sheep in Ceara, Rio Grande do Norte, Paraíba, and Sergipe States

Seroepidemiological study of maedi-visna in sheep in Ceara, Rio Grande do Norte, Paraíba, and Sergipe States

Soroprevalência de Maedi-visna em rebanhos ovinos do estado do Maranhão, Brasil

Ocorrência de anticorpos contra o vírus Maedi-Visna em ovinos Santa Inês, no Estado de Sergipe, Brasil

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