IDO1 and infection: Later on, IDO1-mediated microbial-stasis was also reported in a number of intracellular and extracellular infections; including those caused by Chlamydia spp.[16], Mycobacterium avium[17], herpes simplex virus [18], [19], measles virus [20], cytomegalovirus [21], dengue virus [22], group B streptococcus [23], enterococci [24], and Staphylococcus aureus[25].