In 1990, nearly 1.5 million human immunodeficiency virus (HIV) antibod
y tests were performed at publicly funded sites. Eight percent of thos
e tests were performed for self-identified illegal injecting drug user
s (IDU). The authors examined data from 28 project areas using a clien
t record data base that permitted an analysis of self-reported risk be
havior by type of service delivery site. Among self-identified IDUs, 6
8 percent of those tested and 82 percent of those found to be seroposi
tive had obtained HIV counseling and testing services in settings othe
r than drug treatment centers. The findings indicate that HIV-preventi
on programs for IDUs need to be available in various service delivery
settings, not just in drug treatment programs. Strong links and cooper
ation between sites offering HIV counseling and testing and sites prov
iding drug treatment programs are important to preventing HIV transmis
sion to and from IDUs.