Answers are grounded in this paper and cite their sources.
SUMMARY A serologically distinct infectious bronchitis virus was isolated from clinically affected broilers in Arkansas. In each case the birds had been vaccinated 30 to 50 days previously with commercial Newcastle-bronchitis vaccines. The clinical history and isolation methods are described.
No takes yet. Share an insight, caveat, or question.
David B. Fields (1973) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: