Difference between revisions of "Nocardia asteroides"

From WikiVet English
Jump to navigation Jump to search
Line 23: Line 23:
 
**Cell-mediated immunity required
 
**Cell-mediated immunity required
 
[[Category:Nocardia species]][[Category:Dog]][[Category:Pig]][[Category:Cattle]]
 
[[Category:Nocardia species]][[Category:Dog]][[Category:Pig]][[Category:Cattle]]
 +
[[Category:To_Do_-_Bacteria]]

Revision as of 10:06, 25 June 2010

    • Found in soil and decaying vegetation - saprophytic
    • Opportunistic infection of immunocompromised animals
    • Infection via inhalation, wounds or teat canal; also ingestion
    • Causes granulomatous lesions in animals
    • Canine nocardiosis:
      • Thoracic, cutaneous and disseminated forms
      • Cutaneous pyogranulomas: ulcers or granulomatous swellings with discharging fistulae
      • peritonitis
      • pleuritis and pyothorax with fever, anorexia and respiratory distress
      • Disseminated lesions
      • Treat with appropriate systemic antibiotics for 6 weeks
    • Cattle: chronic mastitis; abortion
    • Pigs: abortion
    • Sheep, goats, horses: wound infections; mastitis; pneumonia
    • Survives and multiplies in macrophages
    • Superoxide dismutase and catalase as well as a thick peptidoglycan wall prevent activity of phagocytes
    • Chronic, progressive disease
    • Positive modified Ziehl-Neelson
    • Culture on blood agar and incubate under aerobic conditions at 37 degrees centigrade for 10 days
    • White, powdery colonies, adherent to the agar appear after 5 days
    • Subculture onto Sabouraud dextrose agar yields wrinkled, orange colonies
    • Lesions difficult to treat due to resistance of organisms to many antimicrobials (e.g. penicillins)
    • Cell-mediated immunity required