Record Detail

Seneca Valley virus
(SVV) is the etiological agent
of vesicular disease in pigs, clinically indistinguishable of
classical viral vesicular infections, including foot-and-mouth
disease. The first outbreaks of SVV infection in Brazil were
reported in 2014. However, it was not known whether the
virus was circulating in Brazilian pig herds before this year.
This study is a retrospective serological investigation of por-
cine health status to SVV in Brazil. Serum samples (
n
=594)
were grouped in before (2007
–
2013,
n
= 347) and after
(2014
–
2016,
n
= 247) SVV outbreaks in Brazil. Twenty-
three pig herds were analyzed, of which 19 and 4 were sam-
pled before and after the beginning of SVVoutbreaks, respec-
tively. Two herds sampled after 2014 presented animals with
SVV-associated clinical manifestations, while the other two
housed asymptomatic pigs. Anti-SVVantibodies were evalu-
ated by virus neutralization test. The results demonstrated that
pig herds of different Brazilian geographical regions and dis-
tinct pig categories were negative to anti-SVV antibodies in
sera obtained before 2014. Antibodies to SVV were detected nly in serum samples obtained after 2014, particularly in
herds with the presence of pigs with SVV-clinical signs.
These results present robust serological evidence that the
SVV was not present in the major Brazilian pig producing
regions prior to 2014.