Atypical rotavirus in chickens in Argentina

Area of Science:

• Veterinary Virology
• Avian Pathology

Background:

• Rotavirus infections can cause significant economic losses in poultry farming.
• Diarrhea outbreaks in chicken flocks necessitate etiological investigations.

Purpose of the Study:

• To investigate the presence and characteristics of rotavirus in a chicken flock with recurrent diarrhea in Argentina.
• To differentiate between standard and atypical rotavirus strains using various diagnostic methods.

Main Methods:

• Enzyme-linked immunosorbent assay (ELISA) for initial screening.
• Electron microscopy (EM) for direct visualization of viral particles.
• Polyacrylamide gel electrophoresis (PAGE) for viral genome analysis and electropherotyping.

Main Results:

• ELISA tests were negative for all analyzed samples.
• Electron microscopy identified particles morphologically consistent with rotaviruses in some samples.
• PAGE analysis confirmed the presence of rotavirus-like agents in 10 out of 36 samples, all exhibiting a uniform electropherotype.

Conclusions:

• The study identified rotavirus-like or atypical rotaviruses in a chicken flock with diarrhea.
• Standard diagnostic methods like ELISA may not detect these atypical strains.
• Further characterization of these avian rotavirus-like viruses is warranted.