He then orders the thin man to swallow a bitter yellow drink, followed by two bananas.
"Whatever you do, there are bound to be skeptics, but I can tell you my method is foolproof," President Yahya Jammeh told an Associated Press reporter, surrounded by bodyguards in his presidential compound. "Mine is not an argument, mine is a proof. It's a declaration. I can cure AIDS and I will."
In a continent suffering from the world's worst AIDS epidemic, Jammeh's claims of a miracle cure are alarming public health workers already struggling against faith healers dispensing herbal remedies from inside thatched huts.
The biggest concern is that the Gambian leader requires patients to cease their anti-retroviral drugs, a move that risks weakening their immune systems and making them even more prone to infection, said Dr. Antonio Filipe Jr., head of the World Health Organization in neighboring Senegal.
Since January, when he announced his cure to a gathering of foreign diplomats, Jammeh has thrown the bureaucratic machinery of this small West African country behind the claim. The last six news releases on Gambia's official Web site are dedicated to the president's treatment, available to Gambians free of charge. Regular radio and TV addresses publicize it and the Health Ministry has issued a declaration of support.
Although the HIV rate is relatively low in Gambia compared to other African nations — 1.3 percent of the country's 1.6 million people are infected — the president's claim has left international health organizations in a bind.
WHO's Filipe was diplomatic about Jammeh's claims, saying his organization respects the president's point of view. But, he added: "As the World Health Organization, we would like to state quite clearly the following — No. 1: so far there is no cure for AIDS."
Jammeh, a 41-year-old former army colonel who wrested gained control in a 1994 coup, says his treatment is entirely voluntary and argues that his medications cannot be mixed with other drugs because "I don't want any complications."
The claim of a cure has prompted comparisons to the South African minister of health who won international ridicule last year for suggesting that a diet of garlic, beet root and lemon juice is more effective than anti-retroviral drugs. South African President Thabo Mbeki has been accused of not addressing the epidemic: His government did not provide AIDS drugs until a lawsuit by AIDS activists forced it to in 2002.
Jammeh has gone to great lengths to prove his claim, sending blood samples of the first nine patients to a lab in Senegal for testing.
A letter on the lab's stationery indicates that of the nine, four had undetectable viral loads, one had a moderate viral load and three had high loads, a result posted on the government's Web site as proof of a cure.
However, the lab technician who performed the tests warned they are not conclusive since the blood samples were only taken after the treatment.
"There is no baseline ... You can't prove that someone has been cured of AIDS from just one data point. It's dishonest of the Gambian government to use our results in this way," said Dr. Coumba Toure Kane, head of the molecular biology unit at Senegal's Cheikh Anta Diop University.