AIDS Distribution Pattern
Epidemiologic studies indicate three broad yet distinct geographic patterns of transmission.
Pattern I is typical of industrialized countries with large numbers of reported AIDS cases, such as North America, Western Europe, Australia, New Zealand, and parts of Latin America. In these areas, most cases occur among homosexual or bisexual males and urban IV drug users. Heterosexual transmission is responsible for only a small percentage of cases but is increasing.
Pattern II is observed in areas of central, eastern, and southern Africa and in some Caribbean countries. In these areas, most cases occur among heterosexuals; the male to female ratio is approximately 1:1 and perinatal transmission is relatively more common than in other areas. IV drug use and homosexual transmission either do not occur or occur at a very low level.
Pattern III is found in areas of Eastern Europe, the Middle East, Asia, and most of the Pacific. HIV appears to have been introduced into these areas in the early to mid-1980s, and only small numbers of cases have been reported. Homosexual and heterosexual transmission has only recently been documented. Generally, cases have occurred among persons who have traveled to endemic areas or who have had sexual contact with individuals from endemic areas, such as homosexual men and female prostitutes.
Latest Publications and Research on AIDS/HIV - Worldwide distribution and Risk of TransmissionHIV testing during pregnancy for prevention of mother-to-child transmission of HIV in Ethiopia. - Published by PubMed
Transcutaneously refillable nanofluidic implant achieves sustained level of tenofovir diphosphate for HIV pre-exposure prophylaxis. - Published by PubMed
Trends of HIV incidence and prevalence among men who have sex with men in Beijing, China: Nine consecutive cross-sectional surveys, 2008-2016. - Published by PubMed
Hepatitis C virus infection in children: How do we prevent it and how do we treat it? - Published by PubMed
Missed opportunities for earlier diagnosis of Human Immunodeficiency Virus infection among adults presenting to Auckland District Health Board hospital services. - Published by PubMed