Science and Technology · Water-borne Diseases

Consider the following statements with reference to cholera and water-borne disease control: I. Cholera is caused by a bacterium that produces an enterotoxin leading to profuse watery diarrhoea and dehydration. II. Oral Rehydration Solution (ORS) treats cholera by directly killing Vibrio cholerae in the intestine. III. Leakage in drinking water pipelines increases the risk of faecal contamination and outbreaks of cholera in urban settings. IV. The Integrated Disease Surveillance Programme (IDSP) is responsible for international notification of cholera outbreaks under the International Health Regulations (IHR), 2005. How many of the above statements are correct?