Overview: Water-borne diseases are any illness caused by drinking water, which contain pathogenic microorganisms. Over the past decades, the picture of water related human health issues has become increasingly comprehensive, with the emergence of new water related infection diseases and the re-emergence of ones already known. Data are available for some water, sanitation and hygiene related diseases, but for others such malaria, schistosomiasis the analyses remain to be done.
Statistics: It was found that the incidence of waterborne disease did not decrease during the period under study. Inequality between metropolitan areas and rural zones was observed. People living in population centres had lower incidence of water-related diseases, possibly due to better access to services. Improvement of the water distribution network between 2000 and 2005 could explain the decrease in morbidity from 30% to 15%, for the total population, and from 34% to 18.5%, for children under five years old.
Problems associated: Waterborne diseases are infections, caused by bacteria, protozoa, viruses or parasites, which are transmitted by consumption of water containing these disease-causing organisms. Cholera – caused by Vibrio cholerae serogroups O1 or O139. Symptoms: profuse watery diarrhoea, vomiting, dehydration, acidosis and circulatory collapse. Due to the rapid dehydration, death in untreated individuals may occur within a few hours.
Essential to prevention efforts are clean drinking water, restaurant and meat inspection, temperature monitoring, appropriate sewage processing, monitoring of public waterways for contamination, and public education on proper hygiene. Vaccines are available for hepatitis A and typhoid fever. Most acute diarrhea episodes are self–limited. Oral or intravenous rehydration therapy may be needed, and an antimotility drug (eg, loperamide) may be useful in viral diarrhea.