Surgeons in Mumbai have removed 232 teeth from the mouth of an Indian teenager in what they believe may be a world-record operation, the hospital said Thursday.

Ashik Gavai, 17, sought medical help for a swelling on the right side of his lower jaw and the case was referred to the city's JJ Hospital, where they found he was suffering from a condition known as complex odontoma, head of dentistry Sunanda Dhivare-Palwankar told AFP.

A man used a blunt razor to chop off the testicles of three patients at a Chinese nursing home, state media said Thursday.

The suspect, who has been arrested, castrated a mentally disabled man aged 60 and removed one testicle each from two bedridden patients aged 53 and 80, the official Xinhua news agency said.

Russia's annexation of Crimea has led to a surge in deaths among intravenous drug users, who no longer have access to vital therapy, specialists said at the world AIDS forum on Thursday.

Michel Kazatchkine, former head of the Global Fund to Fight AIDS, TB and Malaria, and now the U.N.'s AIDS envoy for eastern Europe, told AFP he was "very concerned" and had heard of "20 documented deaths, possibly more."

Nestled among the bars and strip clubs of Sydney's Kings Cross is a service which not only saves lives, but continues the pragmatic approach which prevented a HIV epidemic among drug-users in Australia.

Behind a nondescript shopfront is the Sydney Medically Supervised Injecting Center -- the only place in the southern hemisphere where users can inject heroin and other drugs under the care of registered nurses.

South Korea on Thursday confirmed its first case of foot-and-mouth in more than three years, and just two months after the country was declared free of the disease.

The Agriculture Ministry said in a statement that the case had been confirmed in a pig farm in Uiseong in the eastern province of North Gyeongsang.

Paracetamol, the first-choice lower-back pain killer, worked no better than dummy drugs administered in a trial of more than 1,600 people suffering from the condition, researchers said Thursday.

A doctor in charge of an Ebola treatment center in Sierra Leone has been admitted to hospital after contracting the deadly virus himself, the health ministry said Wednesday.

The news comes just days after three nurses from the same facility died of the disease, which has killed hundreds of people throughout west Africa and continues to spread.

Sweltering temperatures across Japan have left at least three people dead while 3,000 others were rushed to hospital due to heatstroke, officials said Wednesday.

The mercury soared past 30 degrees Celsius (86 degrees Fahrenheit) with high humidity as the country's month-long rainy season comes to an end, after a typhoon battered the country's south earlier this month.

Experimentation with human growth hormones by America's teens more than doubled in the past year, as more young people looked to drugs to boost their athletic performance and improve their looks, according to a new, large-scale national survey.

In a confidential 2013 survey of 3,705 high school students, being released Wednesday by the Partnership for Drug-Free Kids, 11 percent reported using synthetic HGH at least once — up from about 5 percent in the four preceding annual surveys. Teen use of steroids increased from 5 percent to 7 percent over the same period, the survey found.

There is more good news about HIV treatment pills used to prevent infection in people at high risk of getting the AIDS virus: Follow-up from a landmark study that proved the drug works now shows that it does not encourage risky sex and is effective even if people skip some doses.

The research was discussed Tuesday at the International AIDS Conference in Melbourne, Australia, and was published by the British journal Lancet Infectious Diseases.