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Microsporidia are a group of spore-forming unicellular parasites. These spores contain an extrusion apparatus that has a coiled polar tube ending in an anchoring disc at the apical part of the spore. They were once considered protozoans or protists, but are now known to be fungi, or a sister group to fungi. These fungal microbes are obligate eukaryotic parasites that use a unique mechanism to infect host cells. They have recently been discovered in a 2017 Cornell study to infect Coleoptera on a large scale. So far, about 1500 of the probably more than one million species are named. Microsporidia are restricted to animal hosts, and all major groups of animals host microsporidia. Most infect insects, but they are also responsible for common diseases of crustaceans and fish. The named species of microsporidia usually infect one host species or a group of closely related taxa. Approximately 10 percent of the species are parasites of vertebrates —several species, most of which are opportunistic, can infect humans, in whom they can cause microsporidiosis.
Microsporidiosis is an opportunistic intestinal infection that causes diarrhea and wasting in immunocompromised individuals. It results from different species of microsporidia, a group of microbial (unicellular) fungi.
A xenoma is a growth caused by various protists and fungi, most notably microsporidia. It can occur on numerous organisms; however is predominantly found on fish.
Enterocytozoon bieneusi is a species of the order Chytridiopsida which infects the intestinal epithelial cells. It is an obligate intracellular parasite.
Paleoparasitology is the study of parasites from the past, and their interactions with hosts and vectors; it is a subfield of paleontology, the study of living organisms from the past. Some authors define this term more narrowly, as "Paleoparasitology is the study of parasites in archaeological material." K.J. Reinhard suggests that the term "archaeoparasitology" be applied to "... all parasitological remains excavated from archaeological contexts ... derived from human activity" and that "the term 'paleoparasitology' be applied to studies of nonhuman, paleontological material." This article follows Reinhard's suggestion and discusses the protozoan and animal parasites of non-human animals and plants from the past, while those from humans and our hominid ancestors are covered in archaeoparasitology.
Gigantorhynchida is an order containing a single family, Gigantorhynchidae of parasitic worms that attach themselves to the intestinal wall of terrestrial vertebrates. Gigantorhynchida contains the following three genera:
The microsporidian Cucumispora dikerogammari is a parasitic fungal species that infects the invasive amphipod Dikerogammarus villosus. The first recorded evidence of Cucumispora dikerogammari was, as cited by Ovcharenko and Vita, in Germany, circa 1895, by Dr. L. Pfeiffer in the Dnieper Estuary. The Dnieper Estuary and lower parts of the Danube River are considered to be the parasite’s native range. As its host, D. villosus, began to invade novel habitats, C. dikerogammari followed, and has now expanded its range to be found in many of the main bodies of water in Central and Western Europe. At this time, only limited research has been conducted regarding the ecological implications of C. dikerogammari spreading beyond its native range. However, there is evidence to suggest that C. dikerogammari may cause imbalance to the male/female sex ratio of its host D. villosus.
Pseudorhabdosynochus is a genus of monopisthocotylean monogeneans, included in the family Diplectanidae. The type-species of the genus is Pseudorhabdosynochus epinepheli .
The Diplectanidae are a family of monopisthocotylean monogeneans. They are all parasitic on the gills of fish. Diplectanids are small animals, generally around 1 mm in length. As parasites, they can be extremely numerous, up to several thousand on an individual fish.
Lee Hong Susan Lim, more commonly known as Susan Lim, was a Malaysian parasitologist who specialised on the Monogenea, a class of parasitic flatworms which are important ectoparasites of fishes. She was the first and only Malaysian commissioner elected to the International Commission on Zoological Nomenclature. Her research was mainly in the fields of taxonomy and faunistics, although in later years, she became involved in a wide range of parasitological disciplines.
Calydiscoides is a genus of monopisthocotylean monogeneans, included in the family Diplectanidae.
Louis Euzet was a French parasitologist.
Hexabothriidae is a family of monogenean parasites. The family name was proposed by Emmett W. Price in 1942. The family includes 14-16 genera according to authors and about 60 species; all are parasitic on the gills of chondrichthyan fishes.
Doris Mackinnon was a British zoologist. Born in Scotland, her father was a Consular Agent and her mother managed a "women's home". Influenced by Maria Gordon, Mackinnon studied botany and geology at Aberdeen University, graduating in 1906. She received the "Carnegie scholarship", studying abroad for two years before returning to Scotland. She achieved her doctorate from Aberdeen University in 1914, becoming a lecturer at University College, Dundee, in 1916.
Lamellodiscus is a genus of monopisthocotylean monogeneans in the family Diplectanidae; all species of Lamellodiscus are small worms, parasitic on the gills of teleost fish.
Hamiltosporidium is a genus of Microsporidia, which are intracellular and unicellular parasites. The genus, proposed by Haag et al. in 2010, contains two species; Hamiltosporidium tvaerminnensis, and Hamiltosporidium magnivora. Both species infect only the crustacean Daphnia magna (Waterflea).
František Moravec is a Czech parasitologist who specialises on the Nematodes, especially the nematodes parasites of fishes. His research is mainly in the field of taxonomy of the Nematoda.
Allantonematidae is a family of insect-parasitic nematodes from the order Tylenchida. Allantonematid nematodes infect a variety of insects including beetles, butterflies, flies, thrips, ants, and more. For instance, the nematode Howardula aoronymphium parasitizes mushroom-feeding fruit flies, Formicitylenchus oregonensis parasitizes carpenter ants, and Metaparasitylenchus hypothenemi parasitizes a pest of coffee beans, the coffee berry borer.
Carlos José Correia de Azevedo is a Portuguese biologist specialising in microparasites of aquatic organisms, particularly Apicomplexa, Haplosporidia, Microsporidia, and Myxozoa.
References
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- ↑ Carlos Azevedo; Edlison Matos (2003). "Amazonspora hassar n. gen. and n. sp. (Phylum Microsporidia, Fam. Glugeidae), a Parasite of the Amazonian Teleost Hassar orestis (Fam. Doradidae)". Journal of Parasitology. 89 (2): 336–341. doi:10.1645/0022-3395(2003)089[0336:AHNGAN]2.0.CO;2. PMID 12760650.
- ↑ Mykola Ovcharenko (September 21, 2009). "Cucumispora dikerogammari n. gen. (Fungi: Microsporidia) infecting the invasive amphipod Dikerogammarus villosus: a potential emerging disease in European rivers". Parasitology. 137 (2): 191–204. doi:10.1017/S0031182009991119. PMID 19765341. S2CID 206245737.
- ↑ Haag, Karen Luisa; Larsson, J. I. Ronny; Refardt, Dominik; Ebert, Dieter (2011-04-01). "Cytological and molecular description of Hamiltosporidium tvaerminnensis gen. et sp. nov., a microsporidian parasite of Daphnia magna, and establishment of Hamiltosporidium magnivora comb. nov" (PDF). Parasitology. 138 (4): 447–462. doi:10.1017/S0031182010001393. hdl: 20.500.11850/33393 . ISSN 1469-8161. PMID 20946698. S2CID 6811605.