IL23A and infection: IL-23, IL-22 and IL-17 help control infections by extracellular pathogens Candida albicans, Citrobacter rodentium, and Mycoplasma pneumonia, and more recent data have also shown roles in inflammatory responses elicited by Salmonella enteritidis, Chlamydia muridarum, Pseudomonas aeuginosa, and Mycobacterium bovis[14], [15], [16], [17], [18], [19].