Infectious tenosynovitis in broilers and broiler breeders in Egypt.

Area of Science:

• Veterinary Virology
• Avian Pathology

Background:

• Infectious tenosynovitis is a significant concern in broiler production.
• Previous reports on this disease in Egypt were lacking.

Purpose of the Study:

• To isolate and identify viruses causing infectious tenosynovitis in Egyptian poultry.
• To characterize the isolated viruses and confirm their pathogenicity.

Main Methods:

• Virus isolation from infected broiler chickens and breeders.
• Characterization using chicken embryo inoculation and cell culture.
• Neutralization tests with reovirus antiserum.
• Pathogenicity studies in broiler chicks.

Main Results:

• Two viruses causing infectious tenosynovitis were isolated.
• Viruses grew in chicken embryos and cell lines, causing cytopathic effects.
• Pathogenicity was confirmed in broiler chicks, with transmission to controls.
• Viruses were identified as reoviruses based on serological tests.

Conclusions:

• The study successfully isolated and identified two reoviruses responsible for infectious tenosynovitis in Egypt.
• This represents the first documented occurrence and identification of these viruses in the region.
• Findings provide crucial information for disease control and prevention strategies in Egyptian poultry.