Question

Name a human disease, its causal organism, symptoms (any three) and vector, spread by intake of water and food contaminated by human faecal matter.

Answer 1

Amoebic dysentery [Amoebiasis]:

• Causal Organism: 
  Entamoeba histolytica, protozoa
• Symptoms:
  1. Abdominal pain
  2. Constipation
  3. Cramps
• Vector: Housefly

Answer 2

Causal organism:  Amoebiasis is an infection of the large intestine caused by a protozoan, Entamoeba histolytica. The infection spreads by food or water contaminated by flies carrying germs (cysts) from human faeces.

Symptoms: 

1. Intermittent or profuse diarrhea with blood and mucus alternating with constipation.
2. Flatulence and abdominal cramping.
3. Palpable tender ascending colon or right iliac pain.

Vector: Flies carrying germs (cysts) from human faeces contaminate food and water, facilitating the spread of Amoebiasis.