Eimeria is a genus of apicomplexan parasites that includes various species capable of causing .. mice (M. musculus) Eimeria weybridgensis – sheep (O. aries) Eimeria wobati – southern hairy-nosed wombat (L. latifrons) Eimeria zuernii – cattle (B. taurus). Eimeria zuernii is a species of the parasite Eimeria that causes diarrheic disease known as eimeriosis in cattle (Bos taurus), and mainly affects younger animals. Coccidiosis is usually an acute invasion and destruction of intestinal mucosa by protozoa of the genera Eimeria or Isospora. Clinical signs include diarrhea.
|Published (Last):||1 June 2008|
|PDF File Size:||11.74 Mb|
|ePub File Size:||11.5 Mb|
|Price:||Free* [*Free Regsitration Required]|
There has been considerable success with control through immunoprophylaxis using attenuated or precocious strains of parasites, particularly in the poultry eimeris. Chromeraceae Chromera velia Vitrellaceae Vitrella brassicaformis.
Production of bovine coccidiosis with Eimeria zuernii.
Dinokaryota With a theca: This article has been cited by other articles in PMC. A number of species infect rodents, including E. Eieria oocysts contain a developing sporoblast which eventually undergoes sporulation forming sporocysts which contain the infective sporozoites. This genus contains a single species, Crystallospora cristalloides.
Others infect poultry E. The following drugs can be used for treatment of coccidiosis in cattle: Eimeria oocysts exhibit a characteristic 1: Eikeria Center Support Center. Retrieved 24 April Chromerida Chromeraceae Chromera velia Vitrellaceae Vitrella brassicaformis.
Uzernii Data Supplementary Materials. Thirty-one species are known to occur in bats Chiropteratwo in turtles, and named species infect fish. Eimeria Eimeria maxima oocysts Scientific classification Domain: Unstained oocysts are best observed by light microscopy using suboptimal transmitted illumination condenser wound down to introduce diffractionphase-contrast or interference-contrast optics.
Certain species, however, are highly zuernio and cause catarrhalic or haemorrhagic enteritis by severe erosion of the mucosal membranes through cell lysis resulting in profuse watery-to-bloody diarrhoea. This page was last edited on 10 Septemberat Chemical disinfection is usually impractical as the oocysts are resistant to many conventional disinfectants.
Eimeria zuernii auernii a species of the parasite Eimeria that causes diarrheic disease known as eimeriosis in cattle Bos taurusand mainly affects younger animals. This can be observed as bloody diarrhea. Species of this genus infect a wide variety of hosts. Oocysts excreted with host faeces contaminate the external environment, but they must undergo internal sporulation sporozoite formation before they become infective.
The second generation of schizonts undergo a sexual cycle gametogony which is also the time when clinical signs of the disease can be observed. An infected host releases oocysts into the environment in their unsporulated form. However, the search for zuenii immunogenic zurenii and overcoming antigenic variation of the parasites remains a challenge. The species in this genus are tetrasporocystic, dizoic, possess Stieda bodies, and undergo merogony and gametogony on the lumenal surface of the intestinal tract.
Selection and characteristics of a precocious and attenuated line”. Open in a separate window.
Eimeria zuernii – Wikipedia
Out of these, comparing oocyst structures was the most commonly used method. This process is known as gliding motilitywhich is conserved across all species of Apicomplexa. Researchers have recently used a range of molecular techniques to characterize genetic variation between and within parasite species, but few techniques are suitable for routine diagnostic use.
High humidity and temperature can speed up the sporulation time and facilitate new infections faster, which can lead to regular outbreaks of coccidiosis. Abstract The pathogenesis of the lesions caused by Eimeria zuernii in calves is described. It is hypothesised that this may be due to the fact that merozoites are short-lived and a greater antigen repertoire would permit faster binding and invasion.
Copyright eimeriw License information Disclaimer. Eimeriidae These protozoa are known as the enteric coccidia; monoxenous one-host parasites in the digestive tracts of herbivores or carnivores causing diarrhoeal disease known as coccidiosis. Development of Eimeria auburnensis in cell cultures. National Center for Biotechnology InformationU. Veterinary Clinics of North America: The meronts form numerous daughter merozoites by endogenous division of the nucleus followed by cytokinesis.
New hosts are infected when they ingest sporulated oocysts contaminating food or water supplies faecal-oral transmission.
Images in this article Fig. Illustrated Guide to Protozoa, In the case of E.