Patterns and trends in Pakistan's heterogeneous HIV epidemic.

Abstract:

BACKGROUND:Considerable HIV transmission occurs among injection drug users (IDUs) in Pakistan and recently the HIV prevalence has been increasing among male (MSW), hijra (transgender; HSW) and female (FSW) sex workers. We describe past and estimate future patterns of HIV emergence among these populations in several cities in Pakistan. METHODS:The density of these key populations per 1000 adult men was calculated using 2011 mapping data from Karachi, Lahore, Faisalabad, Larkana, Peshawar and Quetta, and surveillance data were used to assess bridging between these key populations. We used the UNAIDS Estimation and Projection Package model to estimate and project HIV epidemics among these key populations in Karachi, Lahore, Faisalabad and Larkana. RESULTS:The density and bridging of key populations varied across cities. Lahore had the largest FSW population (11.5/1000 adult men) and the smallest IDU population (1.7/1000 adult men). Quetta had the most sexual and drug injection bridging between sex workers and IDUs (6.7%, 7.0% and 3.8% of FSW, MSW and HSW, respectively, reported injecting drugs). Model evidence suggests that by 2015 HIV prevalence is likely to reach 17-22% among MSWs/HSWs in Karachi, 44-49% among IDUs in Lahore and 46-66% among IDUs in Karachi. Projection suggests the prevalence may reach as high as 65-75% among IDUs in Faisalabad by 2025. HIV prevalence is also estimated to increase among FSWs, particularly in Karachi and Larkana. CONCLUSIONS:There is a need to closely monitor regional and subpopulation epidemic patterns and implement prevention programmes customised to local epidemics.

journal_name

Sex Transm Infect

authors

Reza T,Melesse DY,Shafer LA,Salim M,Altaf A,Sonia A,Jayaraman GC,Emmanuel F,Thompson LH,Blanchard JF

doi

10.1136/sextrans-2012-050872

subject

Has Abstract

pub_date

2013-09-01 00:00:00

pages

ii4-10

eissn

1368-4973

issn

1472-3263

pii

sextrans-2012-050872

journal_volume

89 Suppl 2

pub_type

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