- Presence of other STDs increases the risk
of HIV acquisition
- ulcerative STDs: 10 to 300 times per exposure
- non-ulcerative STDs: 3 to 10 times per exposure
- In those already HIV-infected, presence of
another STD aids HIV transmission
Source: Hayes et al, 1995; Dallabetta, 1996.
Persons with STDs other than HIV are at increased risk of acquiring
HIV. The presence of an STD ulcer can allow HIV to enter the
bloodstream directly, increasing the risk of acquiring HIV infection
10 to 300 times per exposure; that is, each time someone has
sexual intercourse with an infected person. If a person has
a non-ulcerative STD, the risk of acquiring HIV infection increases
three to 10 times per exposure.
Among HIV-infected persons, the presence of another STD can
make HIV transmission to others more likely. For instance, gonorrhea
and chlamydia in an HIV-infected man or woman appear to increase
the amount of HIV virus shed in the genital tract, making HIV
transmission to a partner more likely.
For these reasons, controlling STDs has become an important
strategy for preventing the spread of HIV/AIDS.