The modes of exposure for HIV vary between Native males and females. For males, the primary mode of exposure is male-sex-with-males (MSM), or a combination of MSM and injection drug use (IDU). For females, injection drug use is the primary mode of disease transmission, followed by heterosexual contact. Individuals without a known exposure risk are categorized as “other.” These are likely to be heterosexual exposures that cannot be tracked. 26
26 Centers for Disease Control and Prevention. HIV/AIDS Surveillance Report, 2005 (Vol. 17). Rev ed. Atlanta: U.S. Department of Health and Human Services, CDC; 2007.