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HIV/AIDS surveillance report : U.S. HIV and AIDS cases reported December 1997
  • Published Date:
    6/18/98
  • Language:
    English
Filetype[PDF - 672.15 KB]


Details:
  • Corporate Authors:
    National Center for HIV, STD, and TB Prevention (U.S.). Division of HIV/AIDS Prevention.
  • Description:
    Year-end edition, Vol. 9, No. 2.

    Through December 1997, 641,086 persons with AIDS have been reported to CDC (table 1). From 1995 to 1996, for the first time in the epidemic, the occurrence of AIDS-defining opportunistic illnesses (AIDS-OIs) among infected persons (tables 18-20) and deaths among persons reported with AIDS (tables 21-23) decreased 7 percent and 25 percent, respectively. These declines were largely due to the increasing use of combination antiretroviral therapy including protease inhibitors. Perinatally-acquired AIDS incidence continued a pattern of marked decline (table 20), principally reflecting successful strategies to promote voluntary prenatal HIV testing and reduce transmission rates through the administration of zidovudine perinatally. These treatment advances have altered the natural history of HIV infection, contributed to an increase in the number of persons living with AIDS, and changed the shape of the epidemic curves (see cover). As therapy has improved the health and prospects for AIDS-free survival among HIV-infected persons who receive these new treatment regimens, the ability of AIDS surveillance data to represent the characteristics of affected populations and project the need for resources for prevention and treatment has been diminished. This edition of the HIV/AIDS Surveillance Report marks a transition in how CDC will present HIV infection and AIDS data depicting the epidemic.

    AIDS surveillance data will no longer be adjusted to reflect the incidence of AIDS-OIs. The incidence of AIDS-OIs can no longer be estimated reliably because data are not currently available to model the increasing effects of therapy on the rate of disease progression. The procedure was developed to take into account the 1993 expansion of the AIDS case definition which had a temporary distorting effect on the AIDS incidence curve (see cover and technical notes). Because of these limitations, the estimates of AIDS-OI incidence in tables 18-20 will not be updated past the end of 1996. Instead, in future editions, CDC will publish estimates of AIDS incidence based on the incidence of all AIDS-defining conditions included in the 1993 AIDS surveillance case definition. AIDS data will remain useful as a measure of severe HIV-related morbidity in the population and to represent populations in which treatments have failed or those which were not tested or treated prior to a diagnosis of AIDS.

    statistics_hivsur92.pdf

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