Transmission through water

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The microbes spread more efficiently through water than by air and infect thousands of people, for example, the microbes of cholera, dysentery and typhoid spread through water. Microbes which cause cholera can live in stagnant water for 5 to 10 days. The area on both the banks of the rivers, Ganga, Brahmaputra, Yamuna, Cauvery etc are cholera - prone. The micro-organisms which are living in affected persons pollute the river water when they bathe, wash, urinate in the river water. When a healty person uses this contaminated water they get infected by the micro organisms easily. In this way, danerous diseases spread like wildfire killing hundreds of people at a stretch. Cholera is a very dangerous disease because, when infected the patient passes watery stools and vomits repeatedly and uncontrolably. Withn a few hours the patient becomes dehydrated and dies. The dreaded typhoid is also a water borne disease caused by Salmonellatyphae. These microbes reach the inestine and lymph glands and then they spread all over the body. In about 7 or 8 days after infection, fever develops. Another dreaded disease causing microbe is Entamoeba histolytica (a protozoan) which causes amoebic dysentery. These protozoa attack the intestine, causing wounds which develop into ulcers, and produce loose motions. There will be cysts of these microbes in the faeces. A patient suffering from this disease may discharge 5 crores of cysts in the excreta during a single day.