Actinomycosis is caused by: (A) Gram +ve filamentous Bacteria, (B) Gram –ve filamentous bacteria, (C) Fungi, (D) None of the above
Answer is A. Actinomycosis is caused by Actinomyces israeli,, an anaerobic gram positive filamentous organism.
Microscopy reveals characteristic sulphur granules in the pus.
The four clinical forms of actinomycosis are cervico-facial (commonest), ileocaecal, thoracic and in liver.
Penicillin is the drug of choice in treating actinomycosis.