Assertion : Escherichia coli, Shigella sp. and Salmonella sp. are...

E.coli, Shigella sp. and Salmonella species are all bacteria which are responsible for the diarrhoea diseases. Diarrhoea is a frequent bowel evacuation or the passage of abnormally soft or liquid faeces. It may be caused by intestinal infections, other form of intestinal inflammation (such as Colitis or Crohn's disease), malabsorption, anxiety and the irritable bowel syndrome. Severe or prolonged diarrhoea may lead to excess losses of fluid, salts and nutrients in the faeces. Dehydration (whose symptoms includes great thirst, nausea and exhaustion) is common to all types of diarrhoeal diseases. The condition is treated by drinking plenty of water, severe cases require oral rehydration therapy or intravenous administration of water and salts. One litre of ORS (Oral rehydration solution) contains $1.5 \mathrm{gm}$ glucose, $3.5 \mathrm{gm} \mathrm{NaCl}, 2.9 \mathrm{gm} \mathrm{KCl} \& 2.9 \mathrm{gm}$ trisodium citrate.