Science and Education Publishing American Journal of Medical Case Reports 2374-216X 5 1 2017 2 16 A Rare Case of Community Acquired Cavitary Lung Disease Caused by Group F Streptococcus 25 28 EN Nishant Tripathi Brookdale University Hospital, Brooklyn, NY San Diego Warren Niki Koirala PharmD AJMCR2017517 10.12691/ajmcr-5-1-7 2016 11 15 2016 12 24 2017 2 14 Many organisms previously considered non-pathogenic are the causative agents of many fatal diseases . Considered to be non-pathogenic, Group F streptococcus is increasingly being implicated in several disease conditions. Streptococcus F can have different forms of hemolysis and presence of carbohydrate antigens that are not routinely tested. As a result they might be wrongly classified as other type of Streptococci or dismissed as contaminant. Here we describe a rare presentation of Cavitary lung disease caused by Group F Streptococcus.