Monday, September 13, 2010
UK - Pandemic H1N1 (2009) influenza virus has been predisposed to porcine Streptococcus suis septicaemia, according to the Veterinary Laboratories Agency (VLA) in its report for June 2010.
Pandemic H1N1 2009 influenza virus infection was detected in one of three post weaned pigs submitted to Bury to investigate and outbreak of disease presenting with lameness, recumbency, nervous signs and some deaths. A fibrinopurulent polyarthritis was identified together with meningitis. Streptococcus suis type 2 was isolated from all three pigs. As there was patchy cranioventral consolidation in two of the pigs, testing for swine influenza was undertaken and one pig was found to be infected by PCR. This is similar to several recent outbreaks of swine influenza virus infection where streptococcal infections have been diagnosed concurrent with swine influenza virus infection.
Thirsk also diagnosed swine influenza having carried out an investigation into a transient cough noticed among gilts after their arrival from a breeding company. Gilts were vaccinated for enzootic pneumonia and PRRSv on arrival. Some gilts were also bled for paired serology. On PCR testing of the swabs for swine influenza, three of the six swabs proved positive for influenza A RNA. Virus isolation was attempted on two of the three positive swabs and an H1 influenza virus was isolated which was similar to A/SW/Eng/438207/94 (H1N2).
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