Tuberculosis services in Mexico need to improve to help ailing individuals and prevent immigrants from spreading the disease to U.S. cities, UPI quoted doctors as saying. Dr. Magin Pereda, who operates a TB program in Mexico, said immediate treatment was desperately needed in Mexico for those diagnosed with tuberculosis, the Chicago Tribune said Monday. "It is a devastating experience to watch people suffering from this disease every day, especially when there are measures to ease their suffering," said Pereda, who battles the disease in Reynosa, Mexico. Equally troubling is how infected Mexican nationals can unknowingly transport the disease to U.S. cities where the infectious disease can spread. While Mexican immigrants make up 6 percent of the total Illinois population, the immigrant group represents 18 percent of all reported TB cases, the Tribune said.