Question

Entamoeba histolytica cysts have _______ nuclei
A. 1-4
B. 5
C. 9
D. 6-8

Answer 1

Hint:
Entamoeba histolytica is a parasitic amoeba from the phylum Sarcomastigophora. It possesses an infectious cyst stage that is resistant to environmental factors. Cysts are excysted in the gut, when the intestinal stage, called a trophozoite, is liberated and starts to proliferate asexually.
E histolytica can survive in the colon's big intestine without harming the gut. It can sometimes penetrate the colon wall and cause colitis, acute dysentery, or persistent diarrhoea. The liver may potentially become infected through the bloodstream.
Entamoeba histolytica/Entamoeba dispar cysts are mature when they have four nuclei, each of which has fine, uniformly distributed peripheral chromatin and karyosomes positioned in the center.

Complete answer:
Entamoeba histolytica/Entamoeba dispar cysts are mature when they have four nuclei, each of which has fine, uniformly distributed chromatin in the periphery and centrally positioned karyosomes. There are two types of E. histolytica: the hardy cyst, which is infectious and has four nuclei, and the trophozoite, which causes invasive sickness but has a single nucleus and has a terrible prognosis outside the human body.
So, Entamoeba histolytica cysts have 1-4 nuclei.

Option ‘A’ is correct

Note:
The large intestine is where E. histolytica often lives. It can stay there for months or years and create an asymptomatic intestinal infection. The majority of those who have this parasite will not show any symptoms. Those who do get sick could have little or major symptoms. The illness typically lasts for two weeks, but if you do not receive treatment, it may return.
Cysts are abnormal sacs filled with fluid that can form in any section of the body's tissues. They come in a wide variety and are relatively frequent.