Anticorpos Contra O Vírus Da Língua Azul Em Rebanhos Ovinos Da Microrregião De Juazeiro, Bahia

Souza, Thiago Sampaio de; Costa, Joselito Nunes; Martínez, Pedro Luis Véliz; Neto, Antônio Oliveira Costa; Pinheiro, R. R.

doi:10.1590/1808-1657v77p4192010

Cited by 12 publications

(1 citation statement)

References 14 publications

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“…Regarding Argentinean isolates, sequences from seven out of ten segments were recorded so far. The other sequences came from isolated acquisitions; most of them were obtained during serological surveillance that recorded high seroprevalence values (>80 %), suggesting that those strains were circulating at that moment [17,18,38,39]. The appearance of reassortants was evident in sequences like 17/BRA/73/2014 (from WGS), which showed a distinct grouping throughout the trees, associating with Central and North American sequences or Argentinean 4/ ARG/829/2001 isolate (see Figs 3 and 7).…”

Section: Discussionmentioning

confidence: 99%

Bluetongue virus in South America: current status based on phylogenetic analysis

Legisa

Santos

2021

Journal of General Virology

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Bluetongue (BT) is an insect-borne disease affecting domestic and wild ruminants. Bluetongue virus (BTV) is the causative agent of the BT disease. BT outbreaks have been widely recorded worldwide. However, in the South American subcontinent, accurate information about the disease and molecular epidemiology is still lacking because little effort has been made to cover the region. This study comprises an exhaustive phylogenetic analysis including all BTV sequences available in databases and reports new Argentinean sequences for Seg 8 and Seg 9. Maximum-likelihood phylogenetic analyses were conducted for Seg 2, Seg 3, Seg 6, Seg 7, Seg 8, Seg 9 and Seg 10. Throughout the study, wide circulation and genetic continuity along the American continent were detected. Also, reassortment events are reported, and the historical virus introduction path into and through South America is suggested.

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Section: Discussionmentioning

confidence: 99%

Bluetongue virus in South America: current status based on phylogenetic analysis

Legisa

Santos

2021

Journal of General Virology

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Prevalence and risk factors for bluetongue in the State of São Paulo, Brazil

Silva

Lima

Spedicato

et al. 2018

Veterinary Medicine & Sci

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Bluetongue (BT), caused by Bluetongue virus (BTV), is a disease that affects ruminants such as cattle, sheep, goats and deer. BTV is transmitted by female midges of the genus Culicoides. In Brazil, information on the prevalence of BTV in cattle is limited, so the objective of this work was to identify BTV serotypes in cattle. The State of São Paulo was divided into seven cattle‐producing regions, and in each of them, 300 cattle farms were randomly selected. One animal from each farm (out of a total of 1,598 farms) was selected and its sera tested by virus neutralization technique against BTV serotypes (1–24 and 26) for determining antibody titre. Moreover, for each sampled farm, an epidemiological questionnaire was submitted to verify the type of cattle production and the zootechnical and sanitary practices carried out, which could be associated with a higher risk of BTV infection. In this study, antibodies (percentage, [95% confidence interval]) were identified against 11 serotypes: BTV‐1 (22.15%, [15.72–27.92]), BTV‐2 (31.03%, [26.65–37.98]), BTV‐3 (18.96%, [12.42–24.90]), BTV‐4 (24.90% [19.41–29.12]), BTV‐9 (6.82%, [1.45–11.72]), BTV‐12 (7.50%, [2.82–12.51]), BTV‐17 (23.90%, [17.35–29.35]), BTV‐19 (10.20%, [4.62–5.56]), BTV‐21 (30.66%, [25.00–36.00]), BTV‐22 (12.14%, [5.91–18.55]), BTV‐26 (57.00%, [51.41–63.59]). In this study, for the first time in Brazil serological evidence of the presence of serotypes BTV‐2, BTV‐9, BTV‐21 and BTV‐26 is reported. The variable ‘new cattle entering herd’ was considered a risk factor for the occurrence of infection (OR = 2.183, 95% CI = 1.6–2.9).

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