Q.Which of the following diseases is caused by a protozoan parasite?
(A) Ascariasis
(B) Amoebiasis
(C) Ringworm
(D) Typhoid

Amoebic dysentery (amoebiasis) is caused by the protozoan parasite Entamoeba histolytica.

Entamoeba histolytica is a protozoan pathogen transmitted through contaminated food and water. It infects the large intestine, causing amoebic dysentery, characterised by abdominal pain and stools containing mucus and blood clots. Wuchereria causes filariasis, Plasmodium causes malaria, and Ascaris causes ascariasis (roundworm infection) — none of these cause amoebic dysentery.

Amoebiasis (amoebic dysentery) is caused by the protozoan parasite Entamoeba histolytica.

Entamoeba histolytica is a protozoan that infects the large intestine of humans, causing amoebiasis, characterised by constipation, abdominal pain and cramps, and stools with excess mucus and blood clots. It spreads mainly through contaminated food and water (housefly acts as a mechanical carrier of the cysts from faeces to food).

Amoebiasis is caused by the protozoan parasite Entamoeba histolytica, transmitted through contaminated food and water.

Entamoeba histolytica is a protozoan parasite that infects the large intestine, causing amoebiasis (amoebic dysentery), characterised by symptoms like constipation, abdominal pain/cramps and stools with excess mucus and blood clots. It spreads through houseflies carrying the pathogen from faeces to food/water, which act as a mechanical carrier of the parasite's cysts.

Entamoeba histolytica is the parasite responsible for the disease amoebiasis.

Entamoeba histolytica is a protozoan parasite that infects the large intestine, causing amoebiasis (amoebic dysentery), characterised by symptoms like constipation, abdominal pain/cramps, and stools with excess mucus and blood clots. It spreads mainly through contaminated food and water (house flies act as mechanical carriers of cysts).

Amoebic dysentery (amoebiasis) is caused by the protozoan parasite Entamoeba histolytica, which infects the large intestine.

Entamoeba histolytica is a parasitic protozoan that infects the human large intestine, causing amoebiasis, commonly known as amoebic dysentery. It is transmitted through contaminated food and water (faeco-oral route, via housefly-carried cysts). Symptoms include abdominal pain, constipation, stools with excess mucus and blood clots.

The other options are not the causative agent of amoebic dysentery:

• Escherichia coli - normally a harmless gut commensal bacterium; certain pathogenic strains cause diarrhoea, but not amoebic dysentery specifically.

• Amoeba proteus - a free-living, non-parasitic amoeba found in freshwater, used as a model organism in biology labs; it does not infect humans.

• Plasmodium vivax - a protozoan parasite that causes malaria, transmitted by the female Anopheles mosquito, not dysentery.

Entamoeba histolytica, a parasitic protozoan, is the causative agent of amoebic dysentery, an intestinal disease.

Entamoeba histolytica is a protozoan parasite that infects the human large intestine, causing amoebic dysentery, characterised by abdominal pain and mucus/blood-containing stools; it spreads through contaminated food and water. Plasmodium vivax causes malaria, Ascaris lumbricoides is a roundworm causing ascariasis, and Wuchereria bancrofti is a filarial worm causing elephantiasis — none of these causes amoebic dysentery.

Entamoeba histolytica is the protozoan parasite that causes amoebiasis (amoebic dysentery) in humans.

Entamoeba histolytica is a parasitic protozoan that infects the human large intestine, spread through contaminated food and water (with houseflies acting as mechanical carriers of the cysts). It causes amoebiasis, characterised by symptoms such as constipation, abdominal pain and cramps, and stools containing excess mucus.

Entamoeba histolytica, a protozoan parasite, causes amoebiasis (amoebic dysentery), an intestinal disease commonly spread through contaminated food and water.

Entamoeba histolytica is a protozoan parasite that infects the large intestine of humans, causing the disease amoebiasis, also called amoebic dysentery. It spreads mainly through contaminated food and water (a faecal-oral route), and through houseflies acting as mechanical carriers of the cysts from faeces to food. Symptoms include constipation, abdominal pain and cramps, and stools with excess mucus and blood clots. Maintaining personal hygiene and public sanitation are the main means of prevention.

Amoebic dysentery is caused by the protozoan parasite Entamoeba histolytica.

Entamoeba histolytica is a parasitic protozoan that infects the large intestine of humans, causing amoebiasis (amoebic dysentery) — characterised by constipation, abdominal pain/cramps, and stools with excess mucus and blood clots. It spreads mainly through contaminated food and water (faecal-oral route).

The other options are pathogens of different diseases: (a) Wuchereria causes filariasis (elephantiasis);

(b) Plasmodium causes malaria;

(c) Ascaris causes ascariasis (a roundworm infection), not amoebic dysentery.