Umegbolu, Emmanuel I., and Moses E. Offor. 2017. “Bacteriological Qualities of Sources of Domestic Water Supply and Prevalence of Typhoid Fever in Some Communities of Enugu State, Southeast, Nigeria: A Cross-Sectional Study”. International Journal Of Community Medicine And Public Health 4 (6):1805-12. https://doi.org/10.18203/2394-6040.ijcmph20172137.