Document 2667 DOCN M94A2667 TI HIV vertical transmission in Buenos Aires: follow-up. DT 9412 AU Laube G; Canizal AM; Zarwanitzer S; Hirsch R; Sosa CE; Benetucci J; Muniz H; FUNDAI y Pediatria, Buenos Aires, Argentina. SO Int Conf AIDS. 1994 Aug 7-12;10(1):252 (abstract no. PB0439). Unique Identifier : AIDSLINE ICA10/94369908 AB OBJECTIVE: To determine the HIV vertical transmission rate in Buenos Aires, Argentina and to assess HIV co-culture and p24 Antigen detection in early diagnosis of pediatric AIDS. METHODS: Thirty seven children born to HIV seropositive mothers were enrolled and prospectively followed until they reached 18 months of age to determine HIV infection. All children were in a PO clinical status according to CDC at the moment of enrollment. Children were studied by EIA (Abbot) and Immunoblot (Novapath, Blorad) for HIV antibody detection. Virus co-culture and p24 Antigen detection (Organon Teknika) were performed in all the samples. RESULTS: Nine out of 37 (24.32%) children were infected after 18 months of follow up according to HIV antibody detection meanwhile seroreverter children lost their antibodies between 7 to 10 months (mean 8.3). Eight out of 37 (21.6%) children were positive for virus co-culture and 6/37 (15.8%) had p24 Antigen detected. Two children out of the ten infected developed AIDS Defining Condition: one lymphoid interstitial pneumonia and one sepele by Salmonella (deceased) and 37.5% of the infected children presented symptomatology before 12 month of age. Mothers' risk factors were: 37.66% intra venous drug users and 63.4% heterosexual transmission. CONCLUSIONS: The HIV1 vertical transmission rate is 24.32% for this population. HIV co-culture showed a good correlation with follow up and antigen is a valuable alternative although not as sensitive as co-culture. This preliminar report shows lower figures than other communications. DE Argentina AIDS Serodiagnosis *Developing Countries Female Follow-Up Studies Human HIV Core Protein p24/BLOOD HIV Infections/DIAGNOSIS/*TRANSMISSION HIV Seropositivity/DIAGNOSIS/*TRANSMISSION Infant Infant, Newborn Pregnancy Pregnancy Complications, Infectious/*DIAGNOSIS Prospective Studies MEETING ABSTRACT SOURCE: National Library of Medicine. NOTICE: This material may be protected by Copyright Law (Title 17, U.S.Code).