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| Eimeria |
|
| Eimeria maxima oocysts |
| Scientific classification |
| Domain: |
Eukaryota |
| Kingdom: |
Chromalveolata |
| Superphylum: |
Alveolata |
| Phylum: |
Apicomplexa |
| Class: |
Conoidasida |
| Order: |
Eucoccidiorida |
| Family: |
Eimeriidae |
| Genus: |
Eimeria
Schneider 1875 |
| Type species |
Eimeria falciformis [1]
(Eimer, 1870) Schneider, 1875 |
| Species |
|
See text
|
Eimeria is a genus of apicomplexan parasites that includes various species capable of causing the disease coccidiosis in cattle and poultry, among other animals. The most prevalent species of Eimeria that cause coccidiosis in cattle would be E. bovis, E. zuernii, and E. auburnensis[2] . In a young, susceptible calf it is estimated that as few as 50,000 infective oocysts can cause severe disease [3] . The oocysts of what was later called Eimeria steidai were first seen by the pioneering Dutch microscopist Antoni van Leeuwenhoek (1632–1723) in the bile of a rabbit in 1674. The genus is named for the German zoologist Theodor Eimer (1843–1898).
Contents
- 1 Description
- 2 Taxonomy
- 3 Pathology
- 4 Clinical
- 5 Host range
- 6 Genomics
- 7 Host-parasite relations
- 7.1 Fish
- 7.2 Reptiles
- 7.3 Birds
- 7.4 Mammals
- 8 List of species
- 9 Life cycle
- 10 References
Description
The coccidia genera can be identified from oocysts:
Eimeria - four sporocysts, each containing two sporozoites
Wenyonella - four sporocysts, each containing four sporozoites
Tyzzeria - eight sporozoites, not contained in sporocysts
Isospora - two sporocysts, each containing four sporozoites
Taxonomy
The Eimeria lie within the family Eimeriidae. This genus has ~75% of the species within this family, and it is the most specious of the genera of the Apicomplexia with 1,700 described species.
Attempts to subdivide this large taxonomic unit into separate genera have been made.
The Eimeria of fish have been divided into four genera based on available morphologic and life cycle data.
Eimeria: these species are tetrasporocystic with dizoic, nonbivalved sporocysts with or without Stieda bodies. This new genus retains the majority of the species.
Goussia (Labbe 1896): These species are tetrasporocystic, dizoic, lack Stieda bodies, and have sporocyst walls consisting of two valves joined by a longitudinal suture. This genus contains about 20 species.
Crystallospora (Labbe 1896): The species in this genus is tetrasporocystic and dizoic, and have dodecahedral sporocysts composed of two hexagonal, pyrimidal valves joined at their bases by a suture. This genus contains a single species, Crystallospora cristalloides (Thelohan 1893).
Epieimeria (Dykova and Lorn 1981): the species in this genus are tetrasporocystic, dizoic, possess Stieda bodies, and undergo merogony and gametogony on the lumenal surface of the intestinal tract. Three species are in this genus.
Pathology
Symptoms of Eimeria infection include bloody diarrhea due to intestinal epithelium dying off when a large number of oocysts and merozoites burst out of the cells. The severity of the disease is directly dependent on the number of infective Eimeria oocysts that are ingested by the bovine. In light infections the damage to the gut might only be minimal and be rapidly repaired as cells are rapidly replaced by the body. However, in heavy infections it may only take two weeks for many intestinal epithelial cells to be infected with either Eimeria meronts or gametocytes. These cause the epithelial cells to burst, which causes significant damage to the intestine epithelial layer, and releases blood, fluid, and electrolytes into the intestine [4] .
Clinical
Medications are available for the parasite; however, drug resistance is common, as well as possible drug residues in the meat once the animal is butchered. Vaccines have been developed, but one vaccine will only cover one species and not others. So far, the best practice is to vaccinate the chicks once they hatch from the egg so they are immune for life.
In case of an infection in cattle with Eimeria, the approximate amount of time it takes for diarrhea to occur after infection is 16-23 days for E. bovis and E. zuernii, and 3-4 days for E. alabamensis [5] .
Human
Five genera are known to cause infections in humans: Cryptosporidium, Cyclospora, Isospora, Sarcocystis, and Toxoplasma. Of these, the first three normally are confined to the gastrointestinal tract and cause diarrhea and abdominal pain. The other two invade the body tissues and may be found in multiple organs.
Treatments
The following drugs can be used for treatment of coccidiosis in cattle: Amprolium, Sulfaquinoxaline, and Sulfamethazine. However, it is often more effective to prevent this disease in cattle, which can be aided by the products Lasalocid, Decoquinate, and Monensin [6] .
Host range
All mammalian coccidia are considered to be host-specific, but a limited number of exceptions to this rule have been identified. Thirty-one species are known to occur in bats (Chiroptera) and two in turtles; 130 named species infect fish.
Two species (E. phocae and E. weddelli) infect seals. Five species infect llamas and alpacas - E. alpacae, E. ivitaensis, E. lamae, E. macusaniensis, and E. punonensis. A number of species infect rodents, including E. couesii, E. kinsellai, E. palustris, E. ojastii and E. oryzomysi. Others infect poultry (E. necatrix and E. tenella), rabbits (E. stiedae) and cattle (E. bovis, E. ellipsoidalis, and E. zuernii).
Genomics
A genome-sequencing project is in progress. The species chosen is Eimeria tenella. The genome is about 60 megabases in size and has a GC content around 53%. The 14 chromosomes range in size from 1 to >6 megabases.
Host-parasite relations
Fish
Eimeria aurati - goldfish (Carassius auratus)
Eimeria baueri -crucian carp (Carassius carassius)
Eimeria lepidosirenis - lungfish (Lepidosiren paradoxa)
Eimeria leucisci - barbel (Barbus barbus bocagei)
Eimeria rutili - Europena chub (Leuciscus cephalus cabeda), Iberian nase (Chondrostoma polylepis polylepis)
Eimeria vanasi - blue tilapia (Oreochromis aurea)
Reptiles
Eimeria amphisbaeniarum - Mann's worm lizard (Amphisbaena manni)
Eimeria witcheri - Mann's worm lizard (A. manni)
Eimeria yemenensae - rock agama (Agama yemenensis)
Birds
Eimeria acervulina - chicken (Gallus gallus domesticus)
Eimeria adenoeides - turkey (Meleagris gallopavo)
Eimeria brunetti - chicken (G. g. domesticus)
Eimeria colchici - pheasant (Phasianus colchicus)
Eimeria curvata - ruddy ground dove (Columbina talpacoti), scaled dove (Scardafella squammata)
Eimeria dispersa - turkey (M. gallopavo), bobwhite quail (Colinus virginianus)
Eimeria duodenalis - pheasant (Phasianus colchicus)
Eimeria fraterculae - Atlantic puffin (Fratercula arctica)
Eimeria gallopavonis - turkey (M. gallopavo)
Eimeria innocua - turkey (M. gallopavo)
Eimeria praecox - chicken (G. g. domesticus)
Eimeria maxima - chicken (G. g. domesticus)
Eimeria meleagridis - turkey (M. gallopavo)
Eimeria meleagrimitis - turkey (M. gallopavo)
Eimeria mitis - chicken (G. g. domesticus)
Eimeria necatrix - chicken (G. g. domesticus)
Eimeria phasiani - pheasant (P. colchicus)
Eimeria praecox - chicken (G. g. domesticus)
Eimeria procera - grey partridges (Perdix perdix)
Eimeria tenella - chicken (G. g. domesticus)
Mammals
Eimeria ahsata - goat (Capra hircus), sheep (Ovis aries)
Eimeria alabamensis - cattle (Bos taurus)
Eimeria alijevi - goat (C. hircus)
Eimeria apsheronica - goat (C. hircus)
Eimeria arloingi - goat (C. hircus)
Eimeria arundeli - common wombat (Vombatus ursinus)
Eimeria bakuensis - sheep (O. aries)
Eimeria bovis - cattle (B. taurus)
Eimeria cameli - camels (Camelus bactrianus,Camelus dromedarius)
Eimeria caprina - goat (C. hircus)
Eimeria caprovina - goat (C. hircus)
Eimeria christenseni - goat (C. hircus)
Eimeria clethrionomyis - red-backed vole (Clethrionomys gapperi)
Eimeria coecicola - rabbit (Oryctolagus cuniculus)
Eimeria contorta - mouse (Mus musculus)
Eimeria couesii - rice rat (Oryzomys couesi)
Eimeria crandallis - sheep (O. aries)
Eimeria dammahensis - scimitar-homed oryx (Oryx dammah)
Eimeria dowleri - eastern red bat (Lasiurus borealis)
Eimeria exigua - rabbit (O. cuniculus)
Eimeria falciformis - mouse (M. musculus)
Eimeria farasanii - mountain gazelle (Gazella gazelle farasani)
Eimeria ferrisi - mouse (M. musculus)
Eimeria flavescens - rabbit (O. cuniculus)
Eimeria gallatii - red-backed vole (C. gapperi)
Eimeria granulosa - goat (C. hircus)
Eimeria hirci - goat (C. hircus)
Eimeria intestinalis - rabbit (O. cuniculus)
Eimeria irresidua - rabbit (O. cuniculus)
Eimeria intricata - goat (C. hircus)
Eimeria jolchijevi - goat (C. hircus)
Eimeria krijgsmanni - mouse (M. musculus)
Eimeria larimerensis - Uinta ground squirrel (Spermophilus armatus)
Eimeria macusaniensis - llamas (Lama glama), guanacos (Lama guanicoe), alpacas (Vicugna pacos), vicunas (Vicugna vicugna)
Eimeria magna - rabbit (O. cuniculus)
Eimeria marconii - red-backed vole (Clethrionomys gapperi)
Eimeria media - rabbit (O. cuniculus)
Eimeria melanuri - garden dormouse (Eliomys quercinus)
Eimeria myoxi - garden dormouse (E. quercinus)
Eimeria nagpurensis - rabbit (O. cuniculus)
Eimeria nieschulzi - black rat (R. norvegicus)
Eimeria ninakohlyakimovae - goat (C. hircus)
Eimeria ovinoidalis - sheep (O. aries)
Eimeria pallida - goat (C. hircus)
Eimeria palustris - marsh rice rat (Oryzomys palustris)
Eimeria papillata - mouse (M. musculus)
Eimeria perforans - rabbit (O. cuniculus)
Eimeria phocae - Sable Island harbour seals (Phoca vitulina)
Eimeria pileata - red-backed vole (Clethrionomys gapperi)
Eimeria pipistrellus - Kuhl's pipistrelle (Pipistrellus kuhlii)
Eimeria piriformis - rabbit (O. cuniculus)
Eimeria prionotemni - Bennett's wallaby (Macropus rufogriseus)
Eimeria procyonis - raccoon (Procyon lotor)
Eimeria punctata - goat (C. hircus)
Eimeria roobroucki - rabbit (O. cuniculus)
Eimeria saudiensis - Arabian oryx (Oryx leucoryx)
Eimeria sealanderi - eastern red bat (Lasiurus borealis)
Eimeria separata - mouse (M. musculus), rat (Rattus rattus)
Eimeria stiedae - rabbit (O. cuniculus)
Eimeria ursini - southern hairy nosed wombat (Lasiorhinus latifrons)
Eimeria vermiformis - mice (M. musculus)
Eimeria weybridgensis - sheep (O. aries)
Eimeria wobati - southern hairy-nosed wombat (L. latifrons)
Eimeria zuernii - cattle (B. taurus)
List of species
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Eimeria abramovi
Eimeria acervulina
Eimeria adenoides
Eimeria ahsata
Eimeria airculensis
Eimeria alabamensis
Eimeria albigulae
Eimeria alijevi
Eimeria alpacae
Eimeria amphisbaeniarum
Eimeria anatis
Eimeria anguillae
Eimeria ankarensis
Eimeria anseris
Eimeria arizonensis
Eimeria arabukosokokensis
Eimeria arnyi
Eimeria arundeli
Eimeria anseris
Eimeria arkhari
Eimeria arloingi
Eimeria aspheronica
Eimeria auburnensis
Eimeria augusta
Eimeria aurati
Eimeria aythyae
Eimeria azerbaidschanica
Eimeria bactriani
Eimeria bakuensis
Eimeria bareillyi
Eimeria baueri
Eimeria battakhi
Eimeria beckeri
Eimeria beecheyi
Eimeria berkinbaevi
Eimeria brinkmanni
Eimeria bombaynsis
Eimeria bonasae
Eimeria boschadis
Eimeria bovis
Eimeria brantae
Eimeria brasiliensis
Eimeria brevoortiana
Eimeria brinkmanni
Eimeria brunetti
Eimeria bucephalae
Eimeria bufomarini
Eimeria bukidnonensis
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Eimeria burdai
Eimeria callospermophili
Eimeria californicenis
Eimeria cameli
Eimeria canadensis
Eimeria canis
Eimeria caprina
Eimeria caprovina
Eimeria carinii
Eimeria carpelli
Eimeria catostomi
Eimeria catronensis
Eimeria caviae
Eimeria cerdonis
Eimeria citelli
Eimeria chelydrae
Eimeria christenseni
Eimeria clarkei
Eimeria clethrionomyis
Eimeria coecicola
Eimeria colchici
Eimeria columbae
Eimeria columbarum
Eimeria contorta
Eimeria coturnicus
Eimeria couesii
Eimeria crandallis
Eimeria crassa
Eimeria curvata
Eimeria cylindrica
Eimeria cynomysis
Eimeria cyprini
Eimeria dammahensis
Eimeria danailovi
Eimeria danielle
Eimeria debliecki
Eimeria deserticola
Eimeria dispersa
Eimeria dolichotis
Eimeria dromedarii
Eimeria duszynskii
Eimeria ellipsoidalis
Eimeria elongata
Eimeria etheostomae
Eimeria eutamiae
Eimeria exigua
Eimeria falciformis
Eimeria fanthami
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Eimeria farasanii
Eimeria farra
Eimeria faurei
Eimeria fernandoae
Eimeria ferrisi
Eimeria filamentifera
Eimeria franklinii
Eimeria fraterculae
Eimeria freemani
Eimeria fulva
Eimeria funduli
Eimeria gallatii
Eimeria gallopavonis
Eimeria gasterostei
Eimeria gilruthi
Eimeria glenorensis
Eimeria gokaki
Eimeria gonzalei
Eimeria gorakhpuri
Eimeria granulosa
Eimeria grenieri
Eimeria guevarai
Eimeria hagani
Eimeria haneki
Eimeria hasei
Eimeria hawkinsi
Eimeria hermani
Eimeria hindlei
Eimeria hirci
Eimeria hoffmani
Eimeria hoffmeisteri
Eimeria hybognathi
Eimeria ictaluri
Eimeria illinoisensis
Eimeria innocua
Eimeria intestinalis
Eimeria intricata
Eimeria iroquoina
Eimeria irresidua
Eimeria ivitaensis
Eimeria judoviciani
Eimeria kinsellai
Eimeria koganae
Eimeria kotlani
Eimeria krijgsmanni
Eimeria krylovi
Eimeria kunmingensis
Eimeria lagopodi
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Eimeria lamae
Eimeria langebarteli
Eimeria larimerensis
Eimeria lateralis
Eimeria laureleus
Eimeria lepidosirenis
Eimeria leucisci
Eimeria ludoviciani
Eimeria macusaniensis
Eimeria magnalabia
Eimeria marconii
Eimeria maxima
Eimeria melanuri
Eimeria meleagridis
Eimeria menzbieri
Eimeria micropteri
Eimeria minasensis
Eimeria mitis
Eimeria monacis
Eimeria morainensis
Eimeria moronei
Eimeria mulardi
Eimeria muta
Eimeria myoxi
Eimeria myoxocephali
Eimeria natricis
Eimeria necatrix
Eimeria neitzi
Eimeria nieschulzi
Eimeria nigricani
Eimeria nocens
Eimeria nyroca
Eimeria ojastii
Eimeria ojibwana
Eimeria onychomysis
Eimeria oryzomysi
Eimeria os
Eimeria osmeri
Eimeria ovata
Eimeria ovinoidalis
Eimeria palustris
Eimeria papillata
Eimeria parvula
Eimeria pigra
Eimeria pilarensis
Eimeria pileata
Eimeria pipistrellus
Eimeria phocae
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Eimeria praecox
Eimeria prionotemni
Eimeria pseudospermophili
Eimeria pulchella
Eimeria pungitii
Eimeria punonensis
Eimeria ranae
Eimeria reedi
Eimeria reichenowi
Eimeria ribarrensis
Eimeria rjupa
Eimeria rutili
Eimeria salvelini
Eimeria saitamae
Eimeria saudiensis
Eimeria separata
Eimeria schachdagica
Eimeria sevilletensis
Eimeria sinensis
Eimeria sipedon
Eimeria somateriae
Eimeria spermophili
Eimeria squali
Eimeria stiedai
Eimeria stigmosa
Eimeria striata
Eimeria subepithelialis
Eimeria surki
Eimeria tamiasciuri
Eimeria tedlai
Eimeria tenella
Eimeria truncata
Eimeria truttae
Eimeria uekii
Eimeria uniungulati
Eimeria ursini
Eimeria vilasi
Eimeria weddelli
Eimeria weybridgensis
Eimeria witcheri
Eimeria vanasi
Eimeria vermiformis
Eimeria volgensis
Eimeria wobati
Eimeria wyomingensis
Eimeria yemenensae
Eimeria yukonensis
Eimeria zuernii
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Life cycle
References
- ^ Donald W. Duszynski, Steve J. Upton & Lee Couch. "Taxonomic Summary of Genera within the Eimeriidae". University of New Mexico. Retrieved November 8, 2010.
- ^ Constable, P. "Coccidiosis: Merck Veterinary Manual". Merck & Co., Inc. Retrieved 24 April 2014.
- ^ Maas, J. "Coccidiosis in Cattle". California Cattlemen's Magazine. Retrieved 24 April 2014.
- ^ Maas, J. "Coccidiosis in Cattle". California Cattlemen's Magazine. Retrieved 24 April 2014.
- ^ Constable, P. "Coccidiosis of Cattle". Merck & Co., Inc. Retrieved 24 April 2014.
- ^ Maas, J. "Coccidiosis in Cattle". California Cattlemen's Magazine. Retrieved 24 April 2014.
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SAR: Chromalveolata: Alveolata
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- Domain
- Archaea
- Bacteria
- Eukaryota
- (Kingdom
- Plant
- Hacrobia
- Heterokont
- Alveolata
- Rhizaria
- Excavata
- Amoebozoa
- Animal
- Fungi)
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| Ciliophora |
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Postciliodesmatophora
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- Heterotrichea (Stentor)
- Karyorelictea (Loxodes)
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Intramacronucleata
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- Spirotrichea (Stylonychia)
- Litostomatea (Didinium, Balantidium)
- Phyllopharyngea (Tokophrya)
- Nassophorea (Nassula)
- Colpodea (Colpoda)
- Oligohymenophorea (Tetrahymena, Ichthyophthirius, Vorticella, Paramecium)
- Plagiopylea (Plagiopyla)
- Prostomatea (Coleps)
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Prostomatea
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| Myzozoa |
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Apicomplexa
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Aconoidasida
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Haemospororida
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- Garniidae (Garnia)
- Haemoproteidae (Haemoproteus)
- Leucocytozoidae (Leucocytozoon)
- Plasmodiidae (Plasmodium)
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Piroplasmida
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- Babesiidae (Babesia)
- Theileriidae (Theileria)
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Conoidasida
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Coccidia
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Agamococcidiorida
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- Gemmocystidae (Gemmocystis)
- Rhytidocystidae (Rhytidocystis)
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Eucoccidiorida
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Adeleorina
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- Adeleidae
- Dactylosomatidae
- Haemogregarinidae (Haemogregarina)
- Hepatozoidae (Hepatozoon)
- Karyolysidae (Karyolysus)
- Klossiellidae
- Legerellidae
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Eimeriorina
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- Aggregatidae
- Atoxoplasmatidae
- Barrouxiidae
- Calyptosporiidae
- Caryotrophidae
- Cryptosporidiidae (Cryptosporidium)
- Eimeriidae (Cyclospora, Eimeria, Isospora)
- Elleipsisomatidae
- Lankesterellidae
- Selenococcidiidae
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Sarcocystidae
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Sarcocystinae
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Frenkelia, Sarcocystis
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Toxoplasmatinae
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Besnoitia, Hammondia, Hyaloklossia, Nephroisospora, Neospora, Toxoplasma
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Ixorheorida
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Protococcidiorida
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- Angeiocystidae (Angeiocystis)
- Eleutheroschizonidae (Coelotropha, Defretinella, Eleutheroschizon)
- Grelliidae (Coelotropha, Grellia)
- Mackinnoniidae (Mackinnonia)
- Myriosporidae (Myriosporides, Myriospora)
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Gregarinia
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Archigregarinorida
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- Exoschizonidae (Exoschizon)
- Selenidioididae (Filipodium, Merogregarina, Meroselenidium, Platyproteum, Selenidium, Selenidioides, Veloxidium)
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Eugregarinorida
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Aseptatorina
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- Aikinetocystidae
- Allantocystidae
- Diplocystidae
- Enterocystidae
- Ganymedidae
- Lecudinidae
- Monocystidae
- Schaudinnellidae
- Selenidiidae
- Urosporidae
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Blastogregarinorina
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- Siedleckiidae (Siedleckia)
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Septatorina
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- Fusionicae (Fusionidae)
- Gregarinicae (Cephaloidophoridae, Cephalolobidae, Didymophoridae, Gregarinidae, Hirmocystidae, Metameridae, Uradiophoridae)
- Porosporicae (Porosporidae)
- Stenophoricae (Actinocephalidae, Acutidae, Amphiplatysporidae, Brustiophoridae, Cnemidosporidae, Dactylophoridae, Leidyanidae, Monoicidae, Monoductidae, Sphaerocystidae, Stylocephalidae, Trichorhynchidae, Stenophoridae)
- Stylocephaloidea (Blabericolidae)
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Neogregarinorida
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- Schizogregarinina (Caulleryellidae, Ophryocystidae)
- Gigaductidae (Gigaductus)
- Lipotrophidae (Apicystis, Farinocystis, Lipotropha, Lipocystis, Mattesia, Menzbieria)
- Schizocystidae (Lymphotropha, Machadoella, Schizocystis)
- Syncystidae (Syncystis)
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Chromerida
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- Chromeraceae (Chromera velia)
- Vitrellaceae (Vitrella brassicaformis)
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Colpodellida
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- Colpodellidae (Acrocoelus, Colpodella)
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Dinoflagellata
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Dinokaryota
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- With a theca: Peridiniales (Pfiesteria, Peridinium)
- Gonyaulacales (Ceratium, Gonyaulax)
- Prorocentrales (Prorocentrum)
- Dinophysiales (Dinophysis, Histioneis, Ornithocercus, Oxyphysis)
- Without theca: Gymnodiniales (Gymnodinium, Karenia, Karlodinium, Amphidinium)
- Suessiales (Polarella, Symbiodinium)
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Noctilucea
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Syndinea
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- Syndiniales: Amoebophryaceae (Amoebophyra)
- Duboscquellaceae (Duboscquella)
- Syndiniaceae (Hematodinium, Syndinium)
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Other
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Dinozoa
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Algovorida
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Algovoridae (Algovora)
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Colponemea
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Ellobiopsea
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- Ellobiopsidae (Elliobiocystis, Ellobiopsis, Thalassomyces)
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Myzomonadea
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Chilovorida
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Voromonadida
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- Alphamonadidae (Alphamonas)
- Voromonadidae (Voromonas)
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Perkinsozoa
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Perkinsea
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- Cryptophagus
- Perkinsidae (Perkinsus)
- Phagodinida (Phagodinium)
- Rastromonadida (Parvilucifera, Rastromonas)
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Unclassified
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