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an order of protozoans of the class Cnidosporidia. There are more than 20 genera, comprising more than 300 species. They are intracellular parasites of animals, predominantly arthropods and fish. Microsporidian amoeboids reproduce asexually (by simple division and schizogony) in the cell cytoplasm of the animal host. After the sexual process (autogamy), formation of spores (sporogony) begins. The spores are usually oval (2–10 microns in length) and have a spirally wound polar thread that serves to embed the parasite in the tissue of a new host.

Microsporidians cause diseases, microsporidioses, in various animals. For example, microsporidians of the genus Nosema are the causative agents of nosematoses, and Nosema cuniculi is possibly the cause of the human disease multiple sclerosis. Many species of Microsporidia are parasites of fish and commercial arthropods. More than 100 species are beneficial as parasites of harmful arthropods, since they cause their mass destruction; the possibility of using these species for the biological control of pests is being investigated.


Zhiznzhivotnykh, vol. 1. Moscow, 1968.
Weiser, J. Die Mikrosporidien als Parasiten der Insekten. Hamburg-Berlin, 1961. I. V. Issi
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Pylori, Hepatitis, Herpes Influenza, Legionella, Lyme disease, Lymphogranuloma, Malaria, Measles, Meningitis, Microsporidium, Mononucleosis, Mumps, Mycoplasma, HPV, Parvovirus, Pneumonia, Polyomaviruses, Pseudomonas, Rabies, RSV, Rhinovirus, Rotavirus, Rubella, Salmonella, Septicemia, Shigella, Staphylococci, Streptococci, Syphilis, Toxoplasmosis, Trichomonas, TB, Vibrio, West Nile, Yersinia.
a microsporidium causing "white larvae" disease is a significant impediment to large-scale production (Inglis et al.
Human vocal cord infection with the microsporidium Anncaliia algerae.
Within eukaryotes, genome size variations of more than 200,000-fold, from the microsporidium Encephalitozoon cuniculi (0.
Protozoa that typically involve the small bowel include Cryptosporidium, Microsporidium, Isospora, Cyclospora, and Giardia lamblia.
9) With a CD4 count of less than 50 opportunistic infections such as Cryptosporidium and Microsporidium play a significant role.
With a T cell count under 100, infections such as Cryptosporidium, Microsporidium, and cytomegalovirus (CMV) become more prevalent.
Two parasitic wasp species used to target house and stable flies were infected by a microsporidium in the Nosema genus.
This stain has also been used to detect parasites such as Acanthamoeba, Microsporidium, Pneumocystis jiroveci, and Naegleria.
SOURCE POSSIBLE PATHOGENS Feces Clostridium difficile Cryptosporidium Hepatitis A virus Pseudomonas eriginosis Rotavirus Salmonella Vancomycin-resistant enterococcus (VRE) Urine Adenoviruses Cytomegalovirus (CMV) Microsporidium Blood Hepatitis A (unusual) Hepatitis B Hepatitis C HIV Adult T-cell leukemia Arboviral infections Brucellosis Babesiosis Creutzfeldt-Jakob disease Lymphoma from HTLV-I and II Malaria Viral hemmoraghic fever Skin Fungi Lice Microbacterium fortuitum Scabies Staphylococcus Streptococcus Yeast
unlike the microsporidium Kneallhazia solenopsae, SINV-3 can be disseminated via bait formulation (valles et al.
for the human microsporidium Nosema corneum Shadduck, Meccoli, Davis & Font, 1990, based on its ultrastructure in the liver of experimentally infected athymic mice.