Why does a person with cholera lose so much body fluid?

A person with cholera loses so much body fluid because of the severe diarrhea and vomiting caused by the infection. The bacterium Vibrio cholerae, which causes cholera, produces a toxin that affects the cells in the small intestine. This toxin causes the cells to secrete large amounts of fluid into the intestine, leading to severe watery diarrhea. Additionally, the bacteria can also cause increased water secretion into the colon, further contributing to diarrhea.

Due to this excessive fluid loss, individuals with cholera can rapidly become dehydrated if they do not receive adequate fluid replacement. Dehydration can further lead to other severe complications, such as electrolyte imbalances, low blood pressure, kidney failure, and eventually death, making cholera a potentially deadly disease.

Therefore, prompt rehydration, typically through oral rehydration salts (ORS) or intravenous fluids, is critical in treating cholera and preventing dehydration-related complications. By replacing verloren fluids and electrolytes, the body's normal functions can be restored, and the patient's health can improve.