Plagues, Pestilences and Diseases
Sexually transmitted diseases becoming drug-resistant 'superbugs'
* From correspondents in Manila
* From: Reuters
* March 30, 2010 11:34AM
THE sexually transmitted disease gonorrhea risks becoming a
drug-resistant "superbug" if doctors do not devise new ways of treating
it, a leading sexual health expert said.
Catherine Ison, a specialist on gonorrhea from Britain's Health
Protection Agency said a World Health Organization (WHO) meeting in
Manila next week would be vital to efforts to try to stop the bug
repeatedly adapting to and overcoming drugs.
"This is a very clever bacteria. If this problem isn't addressed, there
is a real possibility that gonorrhea will become a very difficult
infection to treat," she said.
Gonorrhea is a common bacterial sexually-transmitted infection and if
left untreated can lead to pelvic inflammatory disease, ectopic
pregnancy and infertility in women.
Globally, the WHO estimates that there are at least 340 million new
cases of curable sexually transmitted infections - including syphilis,
gonorrhea, chlamydia and trichomoniasis - every year among people aged
15 to 49.
Ms Ison said the highest incidences of gonorrhea were in south and
southeast Asia and sub-Saharan Africa, but as yet the WHO has no
breakdown by individual infection type.
Current treatment for gonorrhea in most countries consists of a single
antibiotic dose of either cefixime or ceftriaxone.
But Ms Ison, who is due to speak on the issue at a Society for General
Microbiology conference in Edinburgh today, said strains of the
Neisseria gonorrhea bacteria were starting to become resistant and
could soon become impervious to all current antibiotic treatment
options.
"Ceftriaxone and cefixime are still very effective but there are signs
that resistance, particularly to cefixime is emerging and soon these
drugs may not be a good choice," she said.
Instances of gonorrhea being resistant to multiple drugs - the
definition of a "superbug" - have started to appear in Japan, where
health authorities had decided to up the dose to treat the disease, but
stick with the same antibiotic, she said.
Other reports of rising gonorrhea drug resistance had also come from
Hong Kong, China, Australia and parts of Asia.
Ms Ison said the best way to try to reduce the risk now - beyond
encouraging the use of condoms which halt the spread of sexually
transmitted diseases - would be to treat gonorrhea with two different
antibiotics at the same time.
This is a technique used in the treatment of some other diseases like
tuberculosis and one that makes it more difficult for the bacteria to
learn how to conquer the drugs.
"There are few new drugs available. So using more than one at the same
time is probably what should happen in the first instance," Ms Ison
said. "We also need to set up good lines of communication between
countries so that we can all talk to each other about what's happening
in gonorrhea and make sure we change treatment strategies when we need
to."
A WHO spokeswoman said its experts would discuss drug-resistant
gonorrhea at a meeting in the Philippine capital Manila next week.