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About Insomnia Definition Insomnia is difficulty falling asleep or staying asleep, even when a person has the chance to do so. It is a common…

About Photon Definition A photon (also called light quantum) is the quantum of electromagnetic radiation. The term quantum is the smallest elemental unit of a…

About Pyridine Definition Pyridine is a colorless hygroscopic liquid with a characteristic odor. It is a basic chemical compound containing one nitrogen atom and five…

Cryptosporidiosis Definition Cryptosporidiosis is a diarrheal disease caused by microscopic parasites, Cryptosporidium, that can live in the intestine of humans and animals and is passed…

Pyrimidine Definition Pyrimidine is a liquid or crystalline organic compound with a penetrating odour; 1, 3-diazine. It is a weakly basic soluble heterocyclic compound and…

About Babesiosis Definition Babesiosis is a disease caused by infection with the parasite Babesia microti. It is a rare infection of the blood caused by…

Rheumatoid Arthritis Definition Rheumatoid Arthritis (or RA) is an autoimmune disease where the body attacks the lining tissue of joints, causing chronic joint inflammation. While…

About Purines Definition Purines are one of two families of nitrogen-containing molecules called nitrogenous bases. They can be found in every cell of the human…

Arthralgia (Joint Pain) Definition Arthralgia actually means joint pain. It is a combination of two Greek words – Arthro – joint and algos – pain.…

Chikungunya Definition Chikungunya is an RNA virus and a member of the alphavirus genus of the Togaviridae family. The virus is passed on through bites…

About Malaria Definition Malaria is caused by Plasmodium parasites. The parasites are spread to people through the bites of infected female Anopheles mosquitoes, called “malaria…

About Apicomplexa Defintion Apicomplexa is a phylum comprised of organisms (also called apicomplexans) such as coccidian, gregarines, piroplasm, haemogregarines, and plasmodia. All apicomplexans are parasitic…