NEET PG Medical – 2018 – Question – 97
An anaerobe causing multiple abscess with discharging sinuses, demonstrating Sulphur granules in pus is?
a) Actinomycetes
b) Nocardia
c) Salmonella
d) Tularemia
Correct Answer – A
Answer: A. Actinomycetes
Actinomycosis is a rare subacute to chronic infection caused by the gram-positive filamentous non-acid fast anaerobic to microaerophilic bacteria, Actinomyces.
The chronic form has multiple abscesses that form sinus tracts and are associated with sulfur granules. About 70% of infections are due to either Actinomyces israelii or Actinomyces gerencseriae.
The characteristic of the disease is the sulfur granules which are yellow. They are formed primarily by mycelial fragments with some proteinaceous polysaccharide complexes, which act as a resistance mechanism to avoid and inhibit phagocytosis.
Multiple abscess with discharging sinuses, demonstrating Sulphur granules in pus are characteristics of actinomycetes
