Write short notes on typhoid fever and its prophylaxis.

Typhoid fever 

• Cause: It is a bacterial disease caused by bacterium Salmonella typhi.
• Infected part: It mainly lives in the small intestine of man and then migrates to other organs through blood.
• Method of infection: It spreads through contaminated food and water.
  Symptoms: High temperature, weakness, stomach pain, constipation, headache and loss
  of appetite.

Prevention:

• Usage of boiled and filtered water for drinking.
• Proper washing of hands, fruits and vegetables.
• Open defecation must be avoided.