Patient is having scanty, foul smelling discharge from middle ear, develops fever, headache and neck rigidity. CT of the temporal lobe shows a localized ring enhancing lesion, which of the following is least likely cause of this condition?: (A) S. aureus, (B) Pseudomonas, (C) S.Pneumoniae, (D) H. influenza
Answer is D. Commonest organisms in otogenic brain abscess include gram negative (Proteus, E coli, Pseudomonas) and anaerobic bacteria along with Staphylococcus and Pneumocci. H. Influenza infection is a rare cause of otogenic abscess.