Psittacosis (parrot fever): cause, symptoms, diagnosis, treatment

How it spreads and who is at risk

Transmission usually occurs when people inhale aerosolized dust from dried bird droppings, feather dust, or respiratory secretions. Handling sick birds, cleaning cages, or working in pet shops, aviaries, or poultry operations increases risk. Although human cases are uncommon, surveillance reports in some countries list only a small number of confirmed cases per year; for example, about 50 reported cases annually in the United States in recent surveillance summaries epidemiology. Awareness is important for veterinarians, bird owners, and laboratory personnel.

Symptoms and clinical course

Early signs typically resemble a flu-like illness: fever, chills, headache, muscle aches, and dry cough. The respiratory symptoms can progress to pneumonia that may appear atypical on chest imaging. Less common manifestations include joint pain or inflammation, endocarditis in rare instances, and ocular inflammation. Severity ranges from mild outpatient illness to severe pneumonia requiring hospitalization, particularly in older adults or those with weakened immune systems. Key presenting features include:

• Fever and chills
• Headache and myalgia
• Dry cough that may progress to pneumonia
• Occasional complications such as joint swelling or cardiac involvement

Diagnosis and treatment

Diagnosis is suspected from clinical signs plus a history of bird exposure and is confirmed with laboratory testing such as serology, PCR, or specialized culture in reference laboratories. Because of biosafety concerns, cultures are typically handled in specialized labs. Psittacosis responds well to antibiotics; tetracyclines (for example doxycycline) are the preferred first-line agents. Macrolide antibiotics are an alternative for children and pregnant women. Prompt therapy generally leads to recovery; historically case fatality has been low—on the order of about 1% in treated populations—but delays in diagnosis can increase risk.

Prevention, control, and public health

Preventive measures focus on reducing exposure to infected birds and contaminated materials: practicing good hand hygiene, using protective equipment when cleaning cages, avoiding inhalation of dust, and seeking veterinary care for sick birds. Pet stores, breeders, and poultry operations may follow inspection and quarantine procedures to limit spread. Public health authorities provide guidance on reporting and managing human and avian cases clinical signs and diagnostic testing. Occupational safety resources and guidelines are available for at-risk workers workplace precautions.

Notable facts and further reading

Psittacosis is sometimes called "parrot fever" because of historical links with imported parrots, but many bird species can carry the organism. It highlights the broader concept of zoonoses—diseases transmitted from animals to people—and the importance of collaboration between medical and veterinary professionals. For treatment guidance and antibiotic choices see treatment options and for information on complications consult clinical complications. Additional resources include public health fact sheets and occupational advice public health, animal health, and practical cleaning recommendations cleaning and disinfection. For prescribing information on tetracyclines and alternatives see antibiotic guidance.

Further inquiry into recent case counts, local reporting requirements, and bird-specific risks can be pursued through the links above or by contacting local public health and veterinary authorities.