The correctsequenceoflife cycle ofEntamoeba is-a)TrophozoiteMinuteBinu...
The correctsequenceoflife cycle ofEntamoeba is-a)TrophozoiteMinuteBinu...
The correct sequence of the life cycle of Entamoeba is Trophozoite - Minute Binucleate cyst - Quadrinucleate cyst - Excystation - Quadrinucleate metacystic form - Metacystic trophozoite.
1. Trophozoite:
The life cycle of Entamoeba begins with the trophozoite stage. The trophozoite is the active feeding form of the parasite and is characterized by its typical amoeboid shape. It resides in the large intestine of the host and feeds on bacteria and other particles.
2. Minute Binucleate cyst:
Under favorable conditions, the trophozoite undergoes encystation, where it transforms into a cyst form. This cyst is called the Minute Binucleate cyst and is characterized by the presence of two nuclei. It is smaller in size compared to other cyst forms.
3. Quadrinucleate cyst:
After the Minute Binucleate cyst, the next stage in the life cycle is the Quadrinucleate cyst. As the name suggests, this cyst contains four nuclei. It is the most commonly encountered cyst form and is highly resistant to environmental conditions.
4. Excystation:
When the Quadrinucleate cyst is ingested by a suitable host, it undergoes excystation. This process involves the release of the cyst wall and the conversion of the cyst into a trophozoite. Excystation occurs in the small intestine of the host.
5. Quadrinucleate metacystic form:
After excystation, the trophozoite undergoes further changes and transforms into the Quadrinucleate metacystic form. This intermediate stage is characterized by the presence of four nuclei and is considered a transitional stage between the cyst and trophozoite forms.
6. Metacystic trophozoite:
The Quadrinucleate metacystic form finally develops into the Metacystic trophozoite. This stage resembles the original trophozoite and is capable of colonizing the large intestine of the host, leading to the continuation of the life cycle.
In conclusion, the correct sequence of the life cycle of Entamoeba is Trophozoite - Minute Binucleate cyst - Quadrinucleate cyst - Excystation - Quadrinucleate metacystic form - Metacystic trophozoite. Understanding the life cycle of Entamoeba is crucial for the diagnosis and treatment of amoebic infections.