CHOLERA has killed 42 people in the Zambian capital, Lusaka, over the past month, health officials said on Tuesday.Local government officials have banned street vending of food and alerted hotels and restaurants to the threat.”We are putting in place preventive measures and have hired companies to work on drainage,” said council spokesperson Daniel Musoka.The water-borne disease regularly breaks out in Zambia during the summer rains, particularly heavy this year, causing flooding in some parts of the capital.Cholera has also been reported in other centres, with 10 deaths recorded in the northern provincial capital of Ndola.