Entamoeba histolytica is the name given to an anaerobic parasitic protozoan and it belongs to the genus entamoeba. This species is known to infect humans but it may also infect animals like cats and dogs as well as other primates.

A major cause for the transmission parasite is by contamination from the faeces of an infected individual.

The parasite entamoeba histolytica may enter the host in the trophozoite stage and it cause infection in the individual including various liver abscesses the cystic condition is very sensitive to extreme temperatures as it cannot survive under very hot or cold climates.

entamoeba histolytica

The parasite cannot survive in highly acidic environment and is killed. The identification of entamoeba histolytica can be done by studying a wet mount of the parasite. It has been found that there are many morphological similarities between amoeba and entamoeba histolytica.

In a broad spectrum, the cystic stage of the parasite appears to be spherical and it measures 12 to 15 units. A mature form of the cyst may contain more than one nucleus. It has been observed that the entamoeba histolytica dispar cyst may contain one to three nulei.

The peripheral chromatin is found to be evenly distributed and very fine in structure. The cells also contain chromatoid bodies that have blunt edges. The cells also contain glycogen which may be diffused or appears to be clumped depending on the maturity of the entamoeba histolytica cysts.

Entamoeba fragilis is known to infect not only human beings but also gorillas as well as pigs. This parasitic infection occurs mainly in the gastrointestinal tract of the infected mammal. The various symptom associated with entamoeba histolytica infection include diarrhea and dehydration. In most common cases travelers may be infected by ingesting contaminated food or water.

This infection causes diarrhea that is known as traveler’s diarrhea and when present in children it leads to excessive dehydration due to loss of body fluids by diarrhea. This species of entamoeba histolytica is very sensitive and does not service for a long time under various unfavorable conditions.

The most common form of the amoeba histolytica occurs in the cystic stage. This dormant stage of it is known to survive for long periods of time as it is covered by a hard sheath that protects it from various environmental conditions under moist conditions.

But they cannot survive extremely high for cold temperatures and acidic environment. However the trophozoites stage of entamoeba histolytica may be found in fresh loose stools of the infected individual.

When a normal individual accidentally swallows the cysts along with contaminated food the out cyst is released in the digestive tract of the infected individual and the trophozoite stage of the amoeba histolytica parasite emerges thus spreading by binary fission to different parts of the digestive tract of the infected individual.

In case of infections due to entamoeba histolytica, which belongs to the genus amoebae, the free living protozoon may be present in soil and may also spread by injecting contaminated water and food tat is prepared with the contaminated water.

The acanthamoeba polyphaga consists to small cells which may vary in length and shapes. They may be oval or triangular and they move to different locations with the help of pseudopods.

The pseudopodes that are found on the entamoeba histolytica has a clear hemispherical lobe at the anterior end and they also contain filia like extensions that emerges from the outer layer of the bacteria.