An infectious-bronchitis-like virus was isolated from 6-week-old broiler chickens unvaccinated with infectious bronchitis virus (IBV). The isolate produced lesions in embryonating chicken eggs (ECE) and clinical signs in birds characteristic of IBV. Serum-neutralization and agar-gel diffusion tests demonstrated the serological relationship of this isolate to IBV.
No takes yet. Share an insight, caveat, or question.
Hidalgo et al. (1976) studied this question.
Synapse has enriched 5 related papers. Consider them for comparative context: