Observations on viral tenosynovitis (viral arthritis) in Scotland.

The isolation of reoviruses from broiler breeder and layer replacement stock affected with tenosynovitis is recorded. Experimental inoculation of the reovirus isolates in Brown Leghorn chickens produced mild clinical and pathological changes. Virus isolations from the affected joints ceased 15 days after inoculation but continued until day 35 from the caecal tonsil. All inoculated birds developed precipitating antibodies which persisted for at least 46 days.