Scientists have warned about a super Gonorrhoea which poses a 'major global threat' after an Austrian man caught a drug-resistant version of the STI.
The unidentified man, in his 50s, became infected after having unprotected sex with a prostitute while on holiday in Cambodia in April.
Five days later, when he returned home, he experienced a burning pain while urinating and discharge from his penis. Medical tests revealed he had gonorrhoea and he was given standard antibiotics.
While the drugs made his symptoms disappear, the man still tested positive, meaning the treatment had technically failed.
Doctors called his strain 'extensively drug resistant' and different from ones seen before.
They warned it could effectively render gonorrhoea untreatable, if it was allowed to spread.
Lead author of the report, Dr. Sonja Pleininger of the Austrian Agency for Health and Food Safety, said such strains 'poses a major global public health threat'.
'If such strains manage to establish a sustained transmission, many gonorrhoea cases might become untreatable,' she said.
New medications targeting the gonorrhoea bacteria and/or the creation of an effective gonorrhoea vaccine are crucial to limiting the impact of drug resistant strains, the authors added.
The man was eventually treated with a week-long course of amoxicillin-clavulanic acid, a combination antibiotic treatment. He later tested negative.
However, Cambodian sex worker was unable to be traced, meaning the situation could repeat itself, according to experts who detailed the man's case in the journal Eurosurveillance.