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Prison Needle Exchange: Lessons from a Comprehensive Review ...

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injection drug practices and unprotected sexual activity with a drug user were found to<br />

be the strongest risk factors for HIV infection.<br />

• Between 1 October and 31 December 1992 a study of all provincial adult prisons in<br />

British Columbia examined associations between HIV infection and specific demographic<br />

and behavioural characteristics. A total of 2482 (91.3%) of 2719 eligible prisoners<br />

volunteered for testing. <strong>Prison</strong>ers who reported a history of injection drug use<br />

were more likely than the others to refuse HIV antibody test-<br />

ing (12.9% versus 6.8%). The 2482 prisoners who were tested<br />

for HIV were similar to the general prison population<br />

with regard to sex, native status, and age group. A total of 28<br />

prisoners were confirmed to be HIV-positive, for an overall<br />

prevalence rate in the study population of 1.1%. The prevalence<br />

rates were higher among the women than among the<br />

men (3.3% versus 1.0%) and among the prisoners who<br />

reported a history of injection drug use than among those who did not report such a<br />

history (2.4% versus 0.6%). There was no association between HIV status and native<br />

status or age group. The higher prevalence rate among the women is to be explained<br />

by more of the women than of the men reporting a history of injection drug use. The<br />

authors of the study concluded that the overall prevalence rate of 1.1% and the rate<br />

among female prisoners of 3.3% confirm that HIV infection is a reality in prisons and<br />

that the virus has established a clear foothold in prison populations. Further, the<br />

authors suggest that <strong>from</strong> a public health perspective, the data suggested an urgent<br />

need for access to sterile injection equipment in addition to other preventive measures.<br />

23<br />

• A study reported in 1995 determined the seroprevalence of HIV infection and hepatitis<br />

C among prisoners of a federal penitentiary for women. 24 Of the 130 prisoners available<br />

for study, 113 (86.9%) agreed to donate a blood sample. One woman (0.9%) was<br />

HIV-positive; 45 (39.8%) were positive for HCV antibody. The HIV seroprevalence<br />

rate of 0.9% is lower than that found in studies in provincial prisons. However, the high<br />

rate of antibodies to HCV suggests a significant level of risk behaviour, most likely<br />

injection drug use, and suggests the potential for a rapid increase in the rate of HIV<br />

infection should the number of newly admitted HIV-positive prisoners who use injection<br />

drugs rise.<br />

• In 1998 a Queen’s University team conducted a voluntary, anonymous HIV and HCV<br />

serology screen in a Canadian male medium-security federal penitentiary; 25 68% of<br />

520 prisoners volunteered a blood sample and 99% of those giving a blood sample<br />

completed a risk-behaviour questionnaire that was linked numerically to the blood<br />

sample. Compared to previous screenings for HIV (four years earlier) and HCV (three<br />

years earlier 26 ) in the same institution, HIV seroprevalence had risen <strong>from</strong> 1% to 2%<br />

and HCV seroprevalence <strong>from</strong> 28% to 33%. The overwhelming risk association for<br />

HCV was with drug use outside prison, although there was a small group of men who<br />

had only ever injected drugs inside prison, over half of whom had been infected with<br />

HCV. The proportion of prisoners who had injected drugs in prison rose <strong>from</strong> 12% in<br />

1995 to 24% in 1998. The proportion of surveyed individuals sharing injection equipment<br />

at some time in prison was 19%.<br />

• An HIV prevalence study among 394 women incarcerated in Québec, reported in<br />

In Canada, the HIV prevalence<br />

rate in prisons is at least 10<br />

times higher than in the<br />

general population.<br />

HIV and HCV Epidemics in <strong>Prison</strong> 7

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