Infectious Diseases 2008

Infectious Diseases 2008

An Infectious Bronchitis Survey in Western Europe

Research: Avian Pathology 2008 37:247-257 6 July, 2008

A survey of infectious bronchitis virus (IBV) genotypes in poultry flocks in selected countries in Western Europe was carried out between March 2002 and December 2006 by researchers from the University of Liverpool and Fort Dodge Animal Health.
During the survey, 4103 samples were processed, of which 2419 (59%) were positive for IBV. Samples were taken from poultry flocks with disease problems that could be associated with IB. The predominant IBV genotypes detected were 793B and Massachusetts. The third and fourth most common genotypes were two new economically important field types: Italy02, and a virus similar to genotypes originally detected in China called QX.
Since 2004 the prevalence of Italy02 (present in all countries from which samples were received) has been declining in all countries except Spain, where it appeared to be the predominant genotype. Since 2004 an IBV genotype has been detected in Holland, Germany, Belgium and France similar to QX and the incidence has increased. QX (L1148/D388) was not detected in the United Kingdom or Spain.
When detections thought to be attributable to vaccines were removed, the dominant genotype in France and Europe overall was 793B; in Germany, Holland and Belgium, it was QX-like IBV; and in the United Kingdom and Spain the dominant genotype was Italy02.

D1466 showed an increase in 2006. In Holland in 2006, 15% of all IBV-positive samples were D1466.