More than 330 cases of cholera have been recorded since May in and around Kenya’s capital, Nairobi, and three people have died, the health ministry has said.
The ministry has directed health departments nationwide to ban street hawkers from selling food.
It has also ordered an inspection of all hotels, eateries and food handlers across Kenya.
Last week two ministers were admitted to hospital with cholera-like symptoms, after attending an official function.
A BBC correspondent says many Kenyans are asking why street food sellers are being targeted when the ministers and others became sick at establishments including hotels.