Tapeworms of the Taenia and Echinococcus species can also be contracted by humans via accidental ingestion of cat feces containing infectious tapeworm eggs. The only form of Echinococcus transmissable by cats is that causing alveolar echinococcus.
Anyone can contract HIV, and while IDUs are at great risk because of practices related to their drug use, anyone who engages in unsafe sex (e.g., unprotected sex with an infected partner) could be exposed to HIV infection.frican-Americans account for a higher proportion of HIV infections than any other population at all stages of the disease from initial infection to death (see text box). Moreover, specific minority subgroups are at particular risk.
The continent of Africa has been hardest hit by the HIV/AIDS epidemic. In 2010, around 68% of all people living with HIV were residents of sub-Saharan Africa (UNAIDS), though the region accounts for just 12% of the global population. With wider access to anti-retroviral treatment, incidence rates of HIV/AIDS are falling.