JAMA. 1997 Dec 17;278(23):2085-9. Unique Identifier : AIDSLINE
CONTEXT: Most previous studies of clinical presentation and risk factors
in early human immunodeficiency virus (HIV) infection have relied on
retrospective analyses and referred seroconverters, and thus were
subject to possible bias. OBJECTIVES: To apply a method based on
measurement of prevalent HIV-1 p24 antigenemia for identification of
risk factors for newly acquired HIV infection and to describe the signs
and symptoms of acute HIV infection. DESIGN AND SETTING: Nested
case-control study in Pune, India. PARTICIPANTS: HIV antibody-negative
persons attending 2 sexually transmitted disease (STD) clinics between
May 1993 and June 1996. OUTCOME MEASURES: Prevalent p24 antigenemia,
risk factors for HIV infection, and clinical symptoms of acute primary
HIV infection. RESULTS: Of 3874 HIV antibody-negative persons tested, 58
(1.5%) were p24 antigen positive at initial presentation to the clinics.
Unprotected sexual contact with a commercial sex worker (CSW) was
reported by 39 (77%) of the 51 p24 antigenemic men, compared with 131
(51 %) of 255 control men (adjusted odds ratio [AOR], 3.4; 95%
confidence interval [CI], 1.2-9.6; P=.02). The presence of an active
genital ulcer at the time of screening was found in 46 79%) of the 58
p24 antigenemic men and women, compared with 137 47%) of the 290 control
subjects (AOR, 4.2; 95% CI, 2.0-9.0; P<.001). Signs and symptoms
independently associated with p24 antigenemia in HIV
antibody-seronegative persons included fever, which was reported by 28
(48%) of the 58 p24 antigenemic subjects, but only 52 (18%) of the 290
control subjects (AOR, 4.7; 95% CI, 2.4-9.0; P<.001). Joint pain was
reported by 10% of subjects recently HIV infected, compared with 2% of
the control subjects (AOR, 6.5; 95% CI, 1.7-24.8; P=.006). Night sweats
were reported by 9% of the p24 antigenemic, but only 1% of the control
subjects (AOR, 9.1; 95% CI, 1.7-47.6; P=.009). Overall, fever, joint
pain, and/or night sweats were reported in 27 (47%) of the 58 subjects
with recent HIV infection. CONCLUSIONS: This systematic case-control
study of p24 antigen screening in HIV-seronegative patients attending
STD clinics in India identified unprotected sex with a CSW and a genital
ulcer as independent risk factors associated with newly acquired HIV
infection. In addition, p24 antigen positivity identified recent fever,
night sweats, and arthralgias as symptoms that may be predictive of
recent HIV infection. In a study of patients attending STD clinics in
India, screening for p24 antigen in HIV antibody-negative persons was
found to be a reliable and effective research method for determining
recent risk behavior and identifying clinical signs of acute primary HIV
infection.
*HIV Core Protein p24/BLOOD *HIV Infections/DIAGNOSIS *HIV
Infections/EPIDEMIOLOGY *HIV-1/IMMUNOLOGY