Naegleria Infection [Primary Amebic Meningoencephalitis (PAM)] Necrotizing Fasciitis — see Group A Strep Infection Neglected Tropical Diseases (NTD) Pneumocystis jirovecii pneumonia (previously Pneumocystis carinii) — see Pneumocystis pneumonia Neurocysticercosis Nocardiosis [Nocardia asteroides Infection] Non-Polio Enterovirus Infections Nonpathogenic (Harmless) Intestinal Protozoa Norovirus Infection Norwalk-like Viruses (NLV)