Molecular investigation into outbreak of HIV in a Scottish prison
BMJ 1997; 314 doi: https://doi.org/10.1136/bmj.314.7092.1446 (Published 17 May 1997) Cite this as: BMJ 1997;314:1446
- D L Yirrell, senior research fellowa,
- P Robertson, research techniciana,
- D J Goldberg, deputy directorb,
- J McMenamin, lecturer in public health medicineb,
- S Cameron, top grade scientistc,
- A J Leigh Brown, convenora
- a Centre for HIV Research, Institute of Cell, Animal and Population Biology, University of Edinburgh, Edinburgh EH9 3JN
- b Scottish Centre for Infection and Environmental Health, Ruchill Hospital, Glasgow G20 9BN
- c Regional Virus Laboratory, Ruchill Hospital, Glasgow G20 9NB
- Correspondence to: Dr Yirrell
- Accepted 27 February 1997
Abstract
Objectives: To support already established epidemiological links between inmates of Glenochil prison positive for HIV infection by using molecular techniques and thus provide evidence of the extent of acquisition during a recent outbreak of the disease resulting from needle sharing. To identify possible sources of the outbreak, and to demonstrate the ability of the methodology to make further links beyond the original outbreak.
Design: Viral sequences obtained from the blood of HIV positive prisoners previously identified by standard epidemiological methods were compared with each other and with sequences from other Scottish patients.
Setting: Glenochil prison for men, central Scotland.
Subjects: Adult inmates and their possible contacts.
Results: Phylogenetic analysis of viral sequences in two different genomic regions showed that 13 of the 14 HIV positive prisoners had been infected from a common source. Previous research had shown that six of these had acquired their infection in Glenochil; molecular evidence suggests that more than double this number were infected while incarcerated. Virus from two long term HIV positive patients who were in the prison at the time of the outbreak but who were not identified in the original or subsequent surveys was sufficiently different to make it unlikely that they were the source. A viral sequence from heterosexual transmission from one inmate showed the ability of these techniques to follow the infection through different routes of infection.
Conclusion: The number of prisoners infected with HIV during the 1993 outbreak within Glenochil prison was more than twice that previously shown. This shows the potential for the spread of bloodborne diseases within prisons by injecting drugs.
Key messages
Originally, standard serological studies established that six out of 14 HIV positive people had acquired their infection in Glenochil prison in 1993
A subsequent survey estimated that up to 20 prisoners were HIV positive at that time
Molecular linkage techniques showed that 13 of the original 14 infected men had viral sequences similar enough to indicate that one source of infection was common to all
Molecular techniques provide a powerful epidemiological tool either to link or to distance infections with HIV
Injecting drug use is a potentially explosive health care problem in prisons
Footnotes
- Accepted 27 February 1997