Giving details of studies showing a “very serious situation” with regard to highly drug-resistant forms of the sexually-transmitted infection (STI), experts said it was “only a matter of time” before last-resort gonorrhoea antibiotics would be of no use.
At least three people worldwide are infected with totally untreatable “superbug” strains of gonorrhoea which they are likely to be spreading to others through sex, the World Health Organisation has warned.
At least three people in Japan, Spain and France have been found to be infected with the untreatable strain, which they could have spread to others.
An estimated 78 million people contract the STI, which can cause infertility, each year. Its spread has been blamed on oral sex and a decline in condom use.
It will only be a matter of years and this antibiotic will not be useful any more Dr Teodora Wi “Gonorrhoea is a very smart bug,” said Dr Teodora Wi, from WHO. “Every time you introduce a new class of antibiotics to treat gonorrhoea, the bug becomes resistant.
“It will only be a matter of years and this antibiotic will not be useful any more. It takes years to develop new drugs so we need to have that new drug in the pipeline so that in a few years’ time, we have something to replace the current treatment.
“Worryingly, the vast majority of infections are in poor countries where resistance is harder to detect – these cases may just be the tip of the iceberg.”
The infection, which in many cases has no symptoms on its own, can lead to pelvic inflammatory disease, ectopic pregnancy and infertility, as well as increasing the risk of getting HIV.
Dr Wi, who gave details in a telephone briefing of two studies on gonorrhoea published in the journal PLOS Medicine, said one had documented three specific cases of patients with strains of gonorrhoea against which no known antibiotic is effective.
“These are cases that can infect others. It can be transmitted,” she told reporters. “And these cases may just be the tip of the iceberg, since systems to diagnose and report untreatable infections are lacking in lower-income countries where gonorrhoea is actually more common.”
The WHO’s programme for monitoring trends in drug-resistant gonorrhoea found in a study that from 2009 to 2014 there was widespread resistance to the first-line medicine ciprofloxacin, increasing resistance to another antibiotic drugs called azithromycin, and the emergence of resistance to last-resort treatments known as extended-spectrum cephalosporins (ESCs).
In most countries, it said, ESCs are now the only single antibiotics that remain effective for treating gonorrhoea. Yet resistance to them has already been reported in 50 countries.
Manica Balasegaram, director of the Global Antibiotic Research and Development Partnership, said the situation was “grim” and there was a “pressing need” for new medicines.
The pipeline, however, is very thin, with only three potential new gonorrhoea drugs in development and no guarantee any will prove effective in final-stage trials, he said.
“We urgently need to seize the opportunities we have with existing drugs and candidates in the pipeline,” he told reporters. “Any new treatment developed should be accessible to everyone who needs it, while ensuring it is used appropriately, so that drug resistance is slowed as much as possible.”
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