3.4.21.72	culture medium	-	
3.4.21.72	additional information	bacterial isolates show wide variability in IgA1 protease activity, and those isolated from patients with clinical infection possess the highest levels of activity, overview	
3.4.21.72	additional information	distribution of igaB among clinical isolates of nontypeable Haemophilus influenzae, overview	
3.4.21.72	additional information	NTHI is a Gram-negative coccobacillus, which colonizes the human upper respiratory tract as part of the normal flora