Document 0963 DOCN M94A0963 TI The impact of prophylaxis guidelines on Pneumocystis carinii pneumonia (PCP) in infants, U.S.A. DT 9412 AU Simonds RJ; Lindegren M; Thomas P; Scott G; Connolly G; Laraque F; Hanson D; Div HIV/AIDS, CDC, Atlanta, GA 30333. SO Int Conf AIDS. 1994 Aug 7-12;10(2):24 (abstract no. 389B). Unique Identifier : AIDSLINE ICA10/94371612 AB OBJECTIVE: PCP in HIV-infected children occurs most often in infants (< 1 year old) and can be prevented by chemoprophylaxis. However, although prophylaxis guidelines were published in 1991, no decline in PCP cases among infants has been detected. We evaluated the guidelines to determine why prevention efforts may have failed. METHODS: We calculated PCP incidence among infants using national data from AIDS surveillance of children and HIV serosurveillance of childbearing women; we determined the timing of HIV and PCP prophylaxis evaluations by reviewing medical records of infants with PCP from 11 U.S. sites. RESULTS: The incidence of PCP among infants born to HIV-infected women in 1989, 1990, 1991, and Jan-Jun 1992 was 2.7%, 2.7%, 2.1%, and 2.2%, respectively. We reviewed records of 223 infants (median age 4 mos) with PCP diagnosed 1/91-6/93. Of these infants, 169 (76%) had not received prophylaxis before PCP. Of the 169 non-prophylaxed infants, 105 (62%) had not been evaluated for HIV infection > 30 days before PCP. Of the 64 infants who had been evaluated, 45 (70%) did not have CD4 counts measured. Fifteen (79%) of the 19 non-prophylaxed infants who had CD4 counts measured did not qualify for prophylaxis by the guidelines (no counts < 1500 cells/microliters). For 42 infants (including 26 on prophylaxis) who had > or = 2 CD4 counts before PCP diagnosis, the estimated decline in CD4 count during the 3 months before PCP was 937 cells/microliters (95% CI 653-1221 cells/microliters). CONCLUSIONS: The incidence of PCP among infants has not declined substantially since prophylaxis guidelines were published. Most recent cases can be attributed to lack of timely evaluation for HIV. Using CD4 counts as criteria for prophylaxis may be impractical for infants because counts may be difficult to obtain before the age of peak PCP risk (3-6 mos), and may decline rapidly before PCP. HIV screening and PCP prophylaxis strategies must be improved to maximally prevent PCP in infants. DE AIDS-Related Opportunistic Infections/EPIDEMIOLOGY/*PREVENTION & CONTROL Centers for Disease Control and Prevention (U.S.) *Guidelines Human HIV Infections/BLOOD/CONGENITAL Incidence Infant Infant, Newborn Leukocyte Count Pneumonia, Pneumocystis carinii/EPIDEMIOLOGY/*PREVENTION & CONTROL Retrospective Studies T4 Lymphocytes United States/EPIDEMIOLOGY MEETING ABSTRACT SOURCE: National Library of Medicine. NOTICE: This material may be protected by Copyright Law (Title 17, U.S.Code).