eng Science and Education Publishing American Journal of Medical Case Reports 2374-216X 2017-02-16 5 1 25 28 10.12691/ajmcr-5-1-7 AJMCR2017517 article Nishant Tripathi nishant55@icloud.com 1 San Diego Warren 1 Niki Koirala PharmD 2 Brookdale University Hospital, Brooklyn, NY Covenant Medical Center, Waterloo, IA 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. http://pubs.sciepub.com/ajmcr/5/1/7/ajmcr-5-1-7.pdf Streptococcus F caviatary lung disease