Men who have sex with men could worsen China's HIV-1 epidemic

June 19, 2003

Researchers from China and the USA suggest in this week's issue of THE LANCET that men who have unprotected sex with men might worsen China's emerging HIV-1 epidemic because they form a sexual bridge between men and women.

China is undergoing a serious HIV-1 epidemic in intravenous drug users, sex workers, and former blood donors-the UN estimates that as many as 10 million people could be infected by 2010.

Although 75% of current infections are from intravenous drug use and infected blood transfusions, sexual transmission could become the predominant mode of transmission. In China, an estimated 2-8 million men have sex with other men, and might play a key part in spreading infection. Kyung-Hee Choi from the Center for AIDS Prevention Studies, San Francisco, USA, and colleagues assessed rates of HIV-1 infection and risk behaviour of such men in Beijing, China.

The investigators recruited participants through informal social networks and in bars, parks, and bath-houses frequented by men who have sex with men. Health-care workers took a sample of fluid from the mucous membranes of the mouth to test for HIV-1. Samples that tested positive were confirmed by blood tests.

Of 481 men, 15 tested positive for HIV-1. Half of all men reported unprotected intercourse with men during the 6 months before the study, and almost a quarter had unprotected anal or vaginal intercourse with women during the same period. Prevalence of infection was 4.5 times higher in men older than 39 years than in those younger, and many more older men had been married (64%) than had younger men (11%).

Dr Choi comments: "There is low but significant HIV-1 prevalence in men who have sex with men in Beijing. However, in view of the high rates of unprotected sex in such men, HIV-1 infection rates will continue to rise unless prevention measures are implemented. These findings suggest that men who have sex with men could potentially serve as a sexual bridge between high-risk men and low-risk women, and this sexual mixing pattern might contribute to the sexual transmission of HIV-1 to heterosexually active adults."
-end-
Contact: Dr Kyung-Hee Choi, Center for AIDS Prevention Studies, University of California, 74 New Montgomery, Suite 600, San Francisco, CA 94105, USA ; T) 1-415-597-9281; F) 1-415-597-9125; E) khchoi@psg.ucsf.edu

Lancet

Related Infection Articles from Brightsurf:

Halving the risk of infection following surgery
New analysis by the University of Leeds and the University of Bern of more than 14,000 operations has found that using alcoholic chlorhexidine gluconate (CHG) halves the risk of infection in certain types of surgery when compared to the more commonly used povidone-iodine (PVI).

How plants shut the door on infection
A new study by an international team including University of Maryland scientists has discovered the key calcium channel responsible for closing plant pores as an immune response to pathogen exposure.

Sensing infection, suppressing regeneration
UIC researchers describe an enzyme that blocks the ability of blood vessel cells to self-heal.

Boost to lung immunity following infection
The strength of the immune system in response to respiratory infections is constantly changing, depending on the history of previous, unrelated infections, according to new research from the Crick.

Is infection after surgery associated with increased long-term risk of infection, death?
Whether experiencing an infection within the first 30 days after surgery is associated with an increased risk of another infection and death within one year was the focus of this observational study that included about 660,000 veterans who underwent major surgery.

Revealed: How E. coli knows how to cause the worst possible infection
The discovery could one day let doctors prevent the infection by allowing E. coli to pass harmlessly through the body.

UK study shows most patients with suspected urinary tract infection and treated with antibiotics actually lack evidence of this infection
New research presented at this week's European Congress of Clinical Microbiology & Infectious Diseases (ECCMID) in Amsterdam, Netherlands (April 13-16, 2019) shows that only one third of patients that enter the emergency department with suspected urinary tract infection (UTI) actually have evidence of this infection, yet almost all are treated with antibiotics, unnecessarily driving the emergence of antimicrobial resistance.

Bacteria in urine doesn't always indicate infection
Doctors should think carefully before testing patients for a urinary tract infection (UTI) to avoid over-diagnosis and unnecessary antibiotic treatment, according to updated asymptomatic bacteriuria (ASB) guidelines released by the Infectious Diseases Society of America (IDSA) and published in Clinical Infectious Diseases.

Subsidies for infection control to healthcare institutions help reduce infection levels
Researchers compared three types of infection control subsidies and found that under a limited budget, a dollar-for-dollar matching subsidy, in which policymakers match hospital spending for infection control measures, was the most effective at reducing the number of hospital-acquired infections.

Dengue virus infection may cause severe outcomes following Zika virus infection during pregnancy
This study is the first to report a possible mechanism for the enhancement of Zika virus progression during pregnancy in an animal model.

Read More: Infection News and Infection Current Events
Brightsurf.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com.