 Peptostreptoccocci are often overlooked and they are very difficult to isolate, appropriate specimen collection is required.Peptostreptococci grow slowly which makes them increasingly resistant to antimicrobrials.The most common "Peptostreptococcus" species found in infections are "P. magnus" (18% of all anaerobic gram-positive cocci and microaerophilic streptococci), P asaccharolyticus (17%), P anaerobius (16%), P prevotii (13%), P micros (4%), Peptostreptococcus saccharolyticus (3%), and Peptostreptococcus intermedius (2%).