1.

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

Answer»

Amoebiasis (Amoebic Dysentery) 

→ It is caused by Entamoeba histolytica

→ Infection is through contaminated food and water. 

→ Its symptoms include :

(i) Abdominal pain and cramps. 

(ii) Stools with excess mucus and blood clots. 

(iii) Constipation alternating with diarrhoea. Houseflies act as mechanical carriers and transfer the parasite from the faeces of infected person articles and water.



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