Reference Notes | Zoology
Plasmodium – Description of Habitat and Structure
For: Science Class 11 (Biology)
It is a kind of protozoa, which causes malaria. A French microbiologist Charles Laveran in 1880 discovers plasmodium in the blood of patient suffering form Malaria. In RBC, he found a cell which is amoeba like and this structure was not found in healthy man. Then he injected the blood of patient to the healthy man them the healthy man suffered from fever soon.
There are four species of malarial parasites.
Plasmodium vivax: It produces fever at every 48 hours. This is mostly found in India and Nepal.
Plasmodium malariae: It produces fever at every 72 hours.
Plasmodium falciperum: It produces continuous fever with high temperature
Plasmodium ovalae: It produces night fever.
Plasmodium lives in RBC and liver of man. It also lives in some stages in mosquito stomach and salivary gland. It is widely distributed in tropical to temperate region
It is unicellular. A stage of plasmodium in RBC is called trophozoite which is amoeba like and feeding stage. The cell in this stage is covered by plasma lemma and is filled with cytoplasm. In the cytoplasm, double membrane nucleus is present. Endoplasmic reticulum is scattered in cytoplasm and mitochondria are double membrane. Small vesicles form golgibody, food vacuoles and concentric bodies are included in the cytoplasm.