Lung abscesses in 2 patients with Lancefield group F streptococci (Streptococcus milleri group).

Lung abscess presents as a circumscribed accumulation of pus in the lungs, which is more common in patients predisposed to aspiration, immunosuppressed patients, and patients with chronic lung disease, malignancies, or diabetes mellitus.1 Lung abscess is also associated with dental caries, alcohol abuse, and uncontrolled epilepsy. Many reports associate lung abscess with the presence of anaerobic infection,1 but aerobic infections have been reported as well. Despite numerous descriptions of body abscesses produced by Streptococcus milleri group bacteria, lung abscess caused by this group remains under-reported. We present 2 patients admitted with lung abscesses produced by S. milleri group bacteria.