What is the structure of Entamoeba histolytica?
histolytica have a diameter of 15 to 20 m. They are spherical or oval shaped with a thin cell membrane and a single nucleus with a prominent nuclear border, central karysome and vacuole. They move via finger-like pseudopods towards colon. Trophozoites ingest red blood cells and absorbs their nutrients to survive.
Can Entamoeba histolytica affect the brain?
Background. Entamoeba histolytica is the causal agent of amoebiasis, an emerging disease found worldwide . This disease is prevented by improving sanitation. Although usually manifested in the human intestine , this agent can spread to the liver or brain and generate abscesses.
What part of the brain does Amoebiasis affect?
Amoebas are single-celled organisms. The so-called brain-eating amoeba is a species discovered in 1965. Its formal name is Naegleria fowleri. It usually lurks in warm freshwater bodies or untreated, contaminated waters.
Where does Entamoeba histolytica lives in the human body?
Entamoeba histolytica is an anaerobic parasite that is primarily found in the colon; however, for unknown reasons, it can become invasive, breaching the gut barrier and migrating toward the liver causing amoebic liver abscesses.
What is the pathogenicity of Entamoeba histolytica?
The pathogenicity of Entamoeba histolytica is discussed from an immunologic point of view. The evidence that there is some “trigger” mechanism which converts a commensal dwelling organism into a tissue invasive pathogen is rejected as inadequate.
What is the phylum of Entamoeba histolytica?
AmoebozoaEntamoeba histolytica / Phylum
What is amoebic brain abscess?
Amoebic brain abscess is an affliction caused by the anaerobic parasitic protist Entamoeba histolytica. It is extremely rare; the first case being reported in 1849.
What causes brain-eating amoeba?
Naegleria fowleri usually infects people when contaminated water enters the body through the nose. Once the ameba enters the nose, it travels to the brain where it causes PAM, which is usually fatal. Infection typically occurs when people go swimming or diving in warm freshwater places, like lakes and rivers.
What is the vector of Entamoeba histolytica?
Contamination of food may occur with cysts as a result of the contact of food with the fly, which is a vector in the transmission of various cysts of protozoa, including Entamoeba histolytica and other pathogenic microorganisms (e.g. Salmonella, Shigella).
What are the two stages of Entamoeba histolytica?
The category B agent of bioterrorism, Entamoeba histolytica has a two-stage life cycle: an infective cyst stage, and an invasive trophozoite stage.
What is pathogenicity of Entamoeba histolytica?