Document 2454 DOCN M94A2454 TI HIV seroincidence among injection drug users in Los Angeles, USA, 1989-1994. DT 9412 AU Kerndt PR; Weber MD; Ford WL; Cheng FK; Lehman JS; HIV Epidemiology Program, Los Angeles, CA. SO Int Conf AIDS. 1994 Aug 7-12;10(1):300 (abstract no. PC0128). Unique Identifier : AIDSLINE ICA10/94370121 AB OBJECTIVE: To estimate HIV seroincidence (SI) and characterize risk behaviors among injection drug users (IDUs) seeking methadone treatment in Los Angeles County. METHODS: Records were reviewed at 3 methadone treatment clinics to identify all clients who had more than one confidential HIV test. Enrollment varied by clinic (3/89, 6/92, and 11/92, respectively) and is ongoing. Only clients whose first HIV test was negative were included in the analysis. SI was calculated as the number of seroconversions per 100 person years. RESULTS: Of the 2086 persons in treatment during the study period, 543 (26%) had two or more HIV tests. Overall, HIV seroprevalence was 1.2% (26/2086). Among the 543 clients with repeat HIV tests, 337 (62%) were male, and 206 (38%) were female; 265 (49%) were hispanic, were 261 (48%) white, and 17 were (3%) black. Four hundred and eleven (79%) reported continued drug injection, 437 (87%) reported needle sharing in the past 12 months, while 434 (80%) reported usually using bleach to clean needles/syringes prior to use. One seroconversion was identified for a SI rate of 0.12 per 100 person years. Results will be updated to include another year of follow-up. CONCLUSIONS: The low SI is consistent with the low observed HIV prevalence. The measured SI is likely to be a minimum estimate because 1) IDUs who do not remain in treatment or who do not return to treatment may be at higher risk of infection, 2) blacks were undersampled, and 3) recruitment was limited geographically. However, risk behaviors are highly prevalent suggesting that rapid spread of HIV could occur should seroprevalence rates increase. Ongoing drug treatment and behavioral interventions along with continued surveillance for new infections is necessary to monitor and control the spread of HIV among IDUs. DE Female Human *HIV Seroprevalence Los Angeles/EPIDEMIOLOGY Male Risk Factors Substance Abuse, Intravenous/*COMPLICATIONS MEETING ABSTRACT SOURCE: National Library of Medicine. NOTICE: This material may be protected by Copyright Law (Title 17, U.S.Code).