Table 1. Description of infections where protective or pathologic roles of IL-17 have been demonstrated.

	Protective roles of IL-17	Pathologic role of IL-17
Extracellular bacteria	Klebsiella pneumoniae 48, Citrobacter rodentium 49, Staphylococcus aureus 50, and Bordetella pertussis 51	Bordetella pertussis 56, 69, Porphyromonas gingivalis 66, and Haemophilus influenza 70
Intracellular bacteria	Listeria monocytogenes 71, Mycoplasma pulmonis 72, Legionella pneumophila 73, 74, Salmonella typhimurium 75, Chlamydia muridarum 76, Francisella tularensis 77, and Mycobacterium tuberculosis 78	Mycobacterium tuberculosis 96– 98
Parasites	Trypanosoma cruzi 104, Toxoplasma gondii 105, Leishmania braziliensis 106, and Echinococcus granulosus 107	Leishmania major 112, 113, Leishmania guyanensis 114, Eimeria tenella 115, and Toxoplasma gondii 116
Fungus	Candida albicans 117, Cryptococcus neoformans 118, Pneumocystis carinii 119, and Aspergillus fumigatus 120	Candida albicans 130– 133 and Aspergillus fumigatus 133
Virus	H5N1 134– 136 and HIV 154, 155	H1N1 137– 139, respiratory syncytial virus 144– 146, herpes simplex virus 147, 148, Epstein-Barr virus 149, 150, vaccinia virus 142, 143, Dengue virus 153, hepatitis B and C virus 140, 141, and HIV 159

HIV, human immunodeficiency virus; IL-17, interleukin-17.