Question

Typhoid is caused by
a. Escherichia
b. Shigella
c. Salmonella
d. Giardia

Answer 1

Hint: Typhoid is caused by bacteria that infect the blood. It is a gram-negative bacteria responsible for typhoid fever which spreads through contaminated water and food. The symptoms for typhoid include abdominal pain, fever, rash headache, etc.

Complete answer:
> Salmonella typhi – it is the gram-negative that infects the blood and intestinal tract. It causes disease typhoid/ typhoid fever. Paratyphoid is caused by the bacteria salmonella paratyphi and it is of short duration as compared to typhoid.

Typhoid- it spreads by the intake of contaminated food and water. The contamination may be caused by the feces of the person infected with typhoid. The symptoms may start to show from 6 to 30 days after the exposure. The symptoms of typhoid include weaknesses, headache, vomiting, abdominal pain, constipation, etc. It can vary from mild to severe depending on person to person.

Also,
> Escherichia- Escherichia coli is a bacteria which are also found in the intestine to keep our digestive tract healthy. But some of the strains of bacteria cause diarrhea if there is an intake of contaminated food and water. It can also cause pneumonia.

> Shigella- is a bacteria that causes intestinal infection shigellosis. It is also spread through contaminated food and water.

> Giardia- is a parasite that causes intestinal infection giardiasis. It spreads through contact with the infected people.

Hence, the correct answer is option (C).

Note: In the case of typhoid some people without being affected may carry the bacteria, but they can still be able to spread the disease to others. Typhoid can be caused only to humans. Prevention of this disease may include proper sanitation, hygiene, hand washing, etc.