Occurrence: Worldwide were birds are reared on built up litter
Species affected: All.
Age affected: All.
Causes: Staphylococcus aureus is a gram‑positive coccoid‑shaped, ubiquitous organism and is found in clusters.
Effects: Signs include down on hocks, swollen feet (bumblefoot) or hocks, high mortality
in baby chicks (omphalitis), and gangrenous dermatitis. Limits growth rate ini young birds
and reproduction in adults.