Eucoccidiorida is an order

Order (biology)

In scientific classification used in biology, the order is# a taxonomic rank used in the classification of organisms. Other well-known ranks are life, domain, kingdom, phylum, class, family, genus, and species, with order fitting in between class and family...

 of microscopic, spore-forming, single-celled parasites belonging to the apicomplexa

Apicomplexa

The Apicomplexa are a large group of protists, most of which possess a unique organelle called apicoplast and an apical complex structure involved in penetrating a host's cell. They are unicellular, spore-forming, and exclusively parasites of animals. Motile structures such as flagella or...

n class Conoidasida

Conoidasida

Conoidasida is a class of protists.The class was defined in 1988 by Levine and contains two subclasses - the coccidia and the gregarines. All members of this class have a complete, hollow, truncated conoid...

. Protozoans of this order include parasites of humans, and both domesticated and wild animals including birds. Among these parasites are the Toxoplasma gondii

Toxoplasma gondii

Toxoplasma gondii is a species of parasitic protozoa in the genus Toxoplasma. The definitive host of T. gondii is the cat, but the parasite can be carried by many warm-blooded animals . Toxoplasmosis, the disease of which T...

that cause toxoplasmosis

Toxoplasmosis

Toxoplasmosis is a parasitic disease caused by the protozoan Toxoplasma gondii. The parasite infects most genera of warm-blooded animals, including humans, but the primary host is the felid family. Animals are infected by eating infected meat, by ingestion of feces of a cat that has itself...

 and Isospora belli

Isospora belli

Isospora belli is a species of internal parasites classified under Coccidia. It is responsible for the condition isosporiasis. Autofluorescence aids detection....

, which results in isosporiasis

Isosporiasis

Isosporiasis is a human intestinal disease caused by the parasite Isospora belli. It is found worldwide, especially in tropical and subtropical areas. Infection often occurs in immuno-compromised individuals, notably AIDS patients, and outbreaks have been reported in institutionalized groups in the...

.

Definition

This is the largest order in the class Conoidasida and contains those species that all undergo merogony (asexual), gamogony (sexual) and sporogony (spore formation) during their life cycle

Genera

Adelea, Adelina

Adelina (genus)

Adelina is a genus of protozoa within the phylum Apicomplexa. They are coccidian parasites of of arthropods and oligochaetes. Host orders include Coleoptera, Diptera, Collembola, Embioptera, Lepidoptera and Orthoptera.-History:...

, Aggregata, Babesiosoma

Babesiosoma

Babesiosoma is a genus of parasitic protozoa in the phylum Apicomplexia.They have two hosts in their life cycle: the vertebrate hosts are fish and the invertebrate vectors are leeches.This genus has been poorly studied and little is known about it....

, Barrouxia, Besnoitia

Besnoitia

Besnoitia is a genus of Apicomplexan parasite.- Life cycle :The life cycle of many of the species in this genus are not known but it's probably complex with various intermediate hosts and many vectors...

, Calyptospora, Caryospora

Caryospora

Caryospora is a genus of fungi in the family Zopfiaceae....

, Caryotropha, Chagasella, Cryptosporidium

Cryptosporidium

Cryptosporidium is a protozoan that can cause gastro-intestinal illness with diarrhea in humans.Cryptosporidium is the organism most commonly isolated in HIV positive patients presenting with diarrhea...

, Cyclospora

Cyclospora

Cyclospora is a genus of apicomplexan parasites. It includes the species Cyclospora cayetanensis, the causative agent of Cyclosporiasis....

, Cyrilia

Cyrilia

Cyrilia is a genus of parasitic protoza in the phylum Apicomplexia. The genus was created by Lainson in 1981. Species in this genus infect fresh water fish and are transmitted by leeches.-Life cycle:...

, Dactylosoma

Dactylosoma

Dactylosoma is a genus of parasitic protozoa of the phylum Apicomplexia.Species in this genus have two hosts in their life cycle: the vertebrate host is a fish and the invertebrate host is a leech.-Description:...

, Defretinella, Desseria, Diaspora

Diaspora

A diaspora is "the movement, migration, or scattering of people away from an established or ancestral homeland" or "people dispersed by whatever cause to more than one location", or "people settled far from their ancestral homelands".The word has come to refer to historical mass-dispersions of...

, Dorisa, Dorisiella, Eimeria

Eimeria

Eimeria is a genus of Apicomplexan parasites that includes various species responsible for the poultry disease coccidiosis. The genus is named for the German zoologist Theodor Eimer...

, Elleipsisoma

Elleipsisoma

Elleipsisoma is a genus of parasitic protozoa within the phylum Apicomplexia.-History:This parasite was described in 1912 by Franca. This genus may have been described earlier by Graham-SmithThe type species is Elleipsisoma thomsoni-Hosts:...

, Frenkelia, Ganapatiella, Gibbsia, Gousseffia, Grasseella, Hammondia, Haemogregarina

Haemogregarina

Haemogregarina is a genus of haemoprotozoans, parasitic mainly on cold-blooded vertebrates. They are unicellular organisms which are parasitic in the red blood cells.-History:...

, Hemolivia

Hemolivia

Hemolivia is a genus of the phylum Apicomplexia.-History:This genus was described in 1990 by Petit et al.The type specis is Hemolivia stellata.-Characteristics of the genus:...

, Hepatozoon

Hepatozoon

Hepatozoon is a genus of Apicomplexan protozoa which incorporates over 300 species obligate intraerythrocytic parasites. Species have been described from all groups of tetrapod vertebrates, as well as a wide range of haematophagous arthropods, which serve as both the vectors and definitive hosts of...

, Hoarella

Hoarella

Hoarella' is a genus of parasitic protozoa in the phylum Apicomplexa. This genus infects reptiles.Only one species in this genus is recognised.-Description:This genus was described in 1963 by Arcay de Peraza....

, Isospora

Isospora

Isospora is a genus of internal parasites classified under Coccidia.It is responsible for the condition isosporiasis.At least 248 species have been described in this genus, but most of them are little studied and it is doubtful whether all should be recognized as distinct species...

, Ithania, Karyolysus

Karyolysus

Karyolysus is a genus of coccidia. With the exception of K. sonomae whose vertebrate host is the yellow legged frog species in this genus only infect lizards of the genus Lacerta.-History:...

, Klossia, Klossiella, Lankesterella

Lankesterella

Lankesterella is a genus of flowering plants from the orchid family, Orchidaceae.- References :*Pridgeon, A.M., Cribb, P.J., Chase, M.A. & Rasmussen, F. eds. . Genera Orchidacearum 1. Oxford Univ. Press....

, Legerella, Matonella, Merocystis, Neospora

Neospora

Neospora is an important pathogen in cattle and dogs. It was not discovered until 1984 in Norway, where it was found in dogs. It is highly transmissible and some herds can have up to a 90% prevalence. Neospora causes abortions in cattle and up to 33% of pregnancies can result in aborted fetuses on...

, Octosporella

Octosporella

Octosporella is a genus of fungi in the family Pyronemataceae.-External links:*...

, Ovivora, Pfeiffinella, Polysporella, Pseudoklossia, Pythonella, Rasajeyna, Sarcocystis

Sarcocystis

Sarcocystis is a genus of protozoa. Species in this genus infect reptiles, birds and mammals. The name is dervived from Greek: sarx = flesh and kystis = bladder.There are about 130 recognised species in this genus...

, Schellackia

Schellackia

Schellackia is a genus of parasitic protozoa within the phylum Apicomplexa. The genus was described in 1919 by Reichenow. Species in this genus infect reptiles and amphibians.The type species is Schellackia bolivari.-Life cycle:...

, Selococcidium, Selysina, Sivatoshella, Skrjabinella, Spirocystis, Toxoplasma, Tyzzeria

Tyzzeria

Tyzzeria is a genus of parasitic protozoa that with one exception infect the cells of the small intestine.-History:The genus Tyzzeria was first described by Allen in 1936....

, Wenyonella

Families

Some of the genera have been organised into families.

• Family Barrouxiidae
  • Genera
    • Barrouxia
    • Defretinella
    • Goussia
      Goussia
      Goussia is a genus of parasitic protozoa belonging to the phylum Apicomplexia. Although most species in this genus infect fish but a small number infect frogs.-Description:...
      
      

External links

• Taxon: Order Eucoccidiorida Léger & Duboscq, 1910, The Taxonomicon.