Staphylococcosis in captive exotic waterfowl

Area of Science:

• Veterinary Pathology
• Avian Medicine
• Infectious Diseases

Background:

• Staphylococcus aureus is a significant pathogen in both wild and captive avian populations.
• Waterfowl, particularly Anseriformes, can be susceptible to bacterial infections.
• Understanding disease prevalence and contributing factors in zoological collections is crucial for animal health management.

Purpose of the Study:

• To document pathological and epidemiological findings of Staphylococcus aureus infections in waterfowl.
• To identify risk factors and patterns associated with staphylococcosis in captive Anseriformes.
• To correlate clinical signs and lesions with causative agents and environmental factors.

Main Methods:

• Necropsy of 2450 Anseriformes over an 18-year period (1975-1992).
• Gross and histopathological examination of affected tissues (heart, liver, spleen, kidneys, CNS, joints).
• Epidemiological data analysis, including sex, age, and seasonal occurrence.

Main Results:

• 43 out of 2450 waterfowl (1.75%) exhibited staphylococcosis.
• Males (65.1%) were more frequently affected than females (34.9%).
• Infections peaked between January and June, with concurrent amyloidosis noted in 14 birds.

Conclusions:

• The skin, secondary to aggressive breeding behavior, is the likely route of Staphylococcus aureus infection in these waterfowl.
• Male waterfowl exhibit a higher prevalence of staphylococcosis due to behavioral factors.
• Staphylococcosis presents with diverse pathological lesions and can be associated with amyloidosis in Anseriformes.