Key result
Recent Chinese avian reovirus isolates drive higher mortality up to 100% versus reference strain S1133.
Why the study?
Avian reovirus infections causing severe arthritis and growth depression have become increasingly frequent, with unclear changes in pathogenicity and virulence evolution in northern China.
Population
11 avian reovirus field strains isolated from chickens with viral arthritis and reduced growth in northern China
Design
Genetic and pathogenic characterisation study with in vivo infection in specific-pathogen-free chickens
Authors
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Raises concern for increased poultry mortality; hypothesis-generating and warrants expanded surveillance before practice changes.
Absolute Event Rate: 100% vs 53%
Recent avian reovirus isolates from northern China show increased virulence and replication ability compared to reference strains, suggesting evolving pathogenicity.
Li et al. (2016) studied Avian reovirus infection (n=140). Recent Chinese avian reovirus isolates (e.g., MS01) vs. Reference strain S1133 was evaluated on Mortality rate. Recent Chinese avian reovirus isolates demonstrated higher in vivo replication and caused greater mortality (up to 100% for strain MS01) compared to the 53% mortality of the reference strain S1133.
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