Out of the 14 swab samples sent for testing to a laboratory in Jabalpur last week, four were found to be infected following which the patients were admitted to Choithram and Bombay hospitals here, they said.
Of the four, one was from Indore and one each from Ratlam, Dhar and Dewas, officials said.
Nine Swine Flu patients are already undergoing treatment for the disease in the hospitals here, he said.
Since May, Swine Flu has claimed lives of two persons from adjoining districts of Indore.
