Lung abscess by Streptococcus intermedius: An unusual first case report from India.

A unique case report, probably first case from India, of lung abscess caused by Streptococcus intermedius in a previously untreated patient with Type 2 diabetes mellitus is reported here. The patient presented with non-productive cough and right-sided chest pain. Microbiological evaluation confirmed the presence of Streptococcus intermedius and the patient responded positively to antibiotic therapy. This case highlights the fact that S.intermedius may act as pathogen in immunocompromised individuals. So, a caution is needed by the medical fraternity before disregarding it as a commensal.