Enatameoba Coli

·         Host- Human/Pigs/Dogs

·         Locomotion: Unidirectional pseudopodia

·         Only the cyst stage is released to the environment by human.

·         Other animals release trophozoites, but they cannot survive and die.

·         Enatameoba coli are a non-pathogenic protozoan in the small intestine.

Difference between cyst and trophozoites

Trophozoites	Cyst
It has a single nucleus with eccentric located endosomes.	It has 8nucleuses with eccentric located endosomes.
It is irregular in shape.	It is spherical in shape.
It has pseudopodia that are characteristically unidirectional.	It has not pseudopodia.
Chromatid bodies are absent.	Chromatid bodies with blunt ends.

Life cycle:

·         After human is infected by a cyst of Entamoeba histolytica through foods or water, cysts excyst in the small intestine.

    
     ·         Trophozoites feed and multiply aid in binary fission.

     ·         They attach to gut epithelium for feeding.

     ·         Some of trophozoites return into the small intestine and go              to the large intestine with the food stream.

     ·         They secrete cyst wall in order to serve in the dry condition of the large intestine.

                                                                                                             ·         Cysts are released through the fecal matter to the environment.

     ·     Cysts remain in the moist soil for weeks.  

     ·     Cysts go through runoff passively and survive for a month.