Pseudomona aeruginosa is a Gram-negative bacterium that is an opportunistic pathogen that is a normal inhabitant of the soil and surfaces in aqueous environments. It is highly adaptable and resilient, and is highly resistant to many common antibiotics. Most infections involving P. aeruginosa are associated with a high morbidity and mortality.
P. aeruginosa causes localized or systemic disease in young poultry and omphalitis and yolk sac infections in newly hatched chicks. It also been known to cause respiratory infections (including sinusitis), eye infections (keratitis and kratoconjunctivitis), and septicemia. Young, severely stressed, and immunodeficient birds are most severely effected by P. aeruginosa, although birds of all ages are susceptible.