Entamoeba histolytica

Definition

Entamoeba histolytica is a protozoan parasite that causes amoebic dysentery in humans. It primarily infects the intestines, leading to severe gastrointestinal symptoms.

5 Must Know Facts For Your Next Test

1. Entamoeba histolytica has a two-stage life cycle consisting of trophozoites and cysts.
2. The cyst form is highly resistant and can survive outside the host in harsh conditions.
3. Infection occurs through ingestion of contaminated food or water containing E. histolytica cysts.
4. E. histolytica produces enzymes like proteases that degrade host tissues, aiding in its invasive capabilities.
5. Metronidazole is commonly used as an effective antimicrobial drug against E. histolytica infections.

Review Questions

• What are the two stages of Entamoeba histolytica's life cycle?
• How does Entamoeba histolytica typically enter the human body?
• Which antimicrobial drug is most commonly used to treat Entamoeba histolytica infections?

Related terms

Amoebic Dysentery: A severe form of diarrhea caused by infection with Entamoeba histolytica.

Trophozoite:

The active, feeding stage of certain protozoan parasites, including Entamoeba histolytica.

Metronidazole:

An antimicrobial drug commonly used to treat infections caused by anaerobic bacteria and protozoa.