Phylum-Protozoa Entamoeba histolytica classification and life cycle

 

Phylum- Protozoa

·        Entamoeba  histolytica                           Video - 2

  Kingdom- Protista

         Phylum- Protozoa

                 Class- Sarcodina

                       Order-Amoebida

                             Family- Entamoebidae

                                  Genus- Entamoeba

                                      Species- histolytica

Ø  Enamoeba histolytica was discovered by – Lamble.

Ø  Pathogenic nature was discovered by – Losch.

Ø  Enamoeba histolytica is monogenetic intestinal parasite and causes Amoebic dysentery or amoebiasis.

Ø  The parasite possesses single broad Pseudopodium or lobopodium. It does not possess contractile vacuoles.  

Ø  It is dimorphic having non-pathogenic minuta and pathogenic magna or trophozoite stage.

Ø  The trophozoite damages intestinal wall and produces ulcers.

Ø  Amoebiasis results in abdominal pain and loose-motions having mucus and blood.

Ø  The infection is transmitted form old to new host by tetranucleate cysts through contaminated food or water.

Ø  In Entamoeba histolytica, the presence of chromoids bodies is characteristic of Precystic stage.

Ø  Metronidazole is the most effective amoebicide against Amoebiasis.

Ø  Entamoeba differs from Amoeba in absence of contractile vacuole.

Ø  Entamoeba gingivalis lives in between the teeth and gums.

 

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