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Bulletin No. 16 - Fall 2003
Fourth International Symposium on Emerging and Re-emerging Pig diseasesPorcine Reproductive and Respiratory Syndrome (PRRS)
LAROCHELLE R, D'ALLAIRE S, MAGAR R
Molecular epidemiology of porcine reproductive and respiratory syndrome virus (PRRSV) in Qu?bec.
Proceedings of the 4th International Symposium on Emerging and Re-emerging Pig Diseases, 2003, 41-42
The sequences of the ORF5 of 250 samples cases were amplified by PCR and investigated so as to carry out a grouping of strains. The results were successively associated with epidemiological data collected through a questionnaire filled for each submitted case. The results confirmed the high genomic variability of PRRSV and provided interesting findings regarding the suspected relationships between strains within groupings. The common denominator in 19% of strains was the introduction of new animals, geographic location in 33% of strains (aerosol transmission is likely to be involved in more than half of the cases), vaccine-like strains in 14% of strains. This findings born from the association of molecular and epidemiological investigations allowed veterinarians to propose more concrete information to swine specialists.
