History
The word cholera is from Greek word ‘kholera’. The disease first spread by trade routes (land & sea) to Russia in 1817, then to Western Europe, & from Europe to North America.
In Russia alone, between 1847 & 1851, more than one million people perished of the disease. It killed 150,000 Americans during the second pandemic between 1900 & 1920, perhaps eight million people died of cholera in India.
John Snow, in 1854, was the first to identify the importance of contaminated water in its cause. Cholera is now no longer considered a pressing health threat in Europe & North America due to filtering & chlorination of water supplies, but still heavily affects populations in developing countries. Last two year many people die of cholera in western region of Nepal.
Introduction
Cholera is an acute intestinal infection caused by ingestion of food or water contaminated with the bacterium Vibro Cholerae. Most persons infected with V. cholera do not become ill, although the bacterium is present in their feces for 7-14 days. Less than 20% of ill person develop typical cholera with signs of moderate or severe dehydration.
