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2. Coccidia of genus Caryospora (Apicomplexa: Eimeriidae) from the long nosed vine snake, Ahaetulla nasuta (Serpentes: Colubridae: Boiginae) from southern India, with a description of C. veselyi sp. n.
- Creator:
- Modrý, David and Koudela, Břetislav
- Format:
- Type:
- model:internalpart and TEXT
- Subject:
- Apicomplexa, Eimeriidae, Caryospora ahaetullae, Caryospora veselyi sp. n., Serpentes, Colubridae, Ahaetulla nasuta, and India
- Language:
- English
- Description:
- Faecal examination of the long nosed vine snake Ahaetulla nasuta Lacépède, 1789 revealed two species of caryosporan coccidia. The morphology of one species fits well with a description of Caryospora ahaetullae Modrý et Koudela, 1994, the second is a previously undescribed species. Oocysts of Caryospora veselyi sp. n. were spherical, 18.9 (16.5-21.5) pm in diameter, with pitted and brownish oocyst wall about 1.5 pm thick. An irregular polar granule about 2,0 x 1.0 pm was observed in 35% of the oocysts examined. Sporocysts were octozoic, ovoidal to ellipsoidal, 13.7 (13.0-15.5) x 10.3 (9.0-11.0) pm with a shape index 1.3 (1.2-1.4). Stieda and substieda bodies were present. Sporocyst residuum was present as small granules of irregular size scattered among sporozoiles. Both species sporulated within 72 hours. The infected snake did not show clinical signs of disease.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
3. Discovery of the life cycle of Sarcocystis lacerine Babudieri, 1932 (Apicomplexa: Sarcocystidae), with a species redescription
- Creator:
- Volf, Jiří, Modrý, David, Koudela, Břetislav, and Šlapeta, Jan R.
- Format:
- Type:
- model:internalpart and TEXT
- Subject:
- Apicomplexa, Sarcocystidae, Sarcocystis lacertae, life cycle, and redescription
- Language:
- English
- Description:
- Oocysts/sporocysts of Sarcocystis sp. were found in the intestinal contents of the smooth snake, Coronella austriaca I .aurenti. Common voles Microtus arvalis (Pallas), bank voles Clethrionomys glareolus (Schreber), green lizards Lacerta viridis (Laurcnti), and common wall lizards Podarcis muralis (Laurenti) were experimentally inoculated as potential intermediate hosts. Only common wall lizards were found to be susceptible intermediate hosts. Transparent, macroscopically hardly visible sarcocysts found in tail striated muscles of lizards were 480 (390-640) x 210 (190-230) pm in size 72 days post-infection. Using the light microscopy, the sarcocyst wall was about 1 pm thick with an apparent layer of villi approx. 2 pm thick. Ullraslruclurally, the primary cyst wall was characterised by spine-like villar protrusions up to 2.5 pm in length and 0.5 pm in diameter. Based on sarcocyst morphology and experimental data, the discovered Sarcocystis species is suggested to be conspccific with Sarcocystis lacertae Babudieri, 1932. A redescription of Sarcocystis lacertae is presented in this study.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
4. Eimeria burdai sp. n. (Apicomplexa: Eimeriidae), a new parasite species from subterranean African silvery mole-rat, Heliophobius argenteocinereus
- Creator:
- Koudela, Břetislav, Šumbera, Radim, and Sedláček, František
- Format:
- Type:
- model:internalpart and TEXT
- Subject:
- Apicomplexa, Eimeriidae, Eimeria burdai, Rodontia, Bathyergidae, and Heliophobius argenteocinereus
- Language:
- English
- Description:
- A new coccidian parasite of the genus Eimeria Schneider, 1875 is described from the subterranean African silvery mole-rat Heliophobius argenteocinereus Peters, 1846. Oocysts of Eimeria burdai sp. n. were subspherical to broadly ellipsoidal 17.8 (16-19) x 14.1 (12-15), with ashape index 1.2 (1.1-1.4). Oocyst wall was bilayered, smooth and colourless, approximately 1.0 thick. Outer layer was significantly thicker than inner one. A micropyle and oocyst residuum were absent. One or two ellipsoidal or spherical polar granules were present. Sporocysts were ellipsoidal, 10.8 (9-12) x 6.2 (5-8) with a shape index 1.7 (1.5-1.9). Sporocyst wall was single-layered, thin, smooth and colourless, with small Sticda body at the pointed end. In freshly sporulated oocysts, spherical sporocyst residuum was composed of small granules enclosed by a thin membrane. Sporozoites were elongate, lying length-wise in the long axis of the sporocyst, partially curled around each other, with single large refractile body located posteriorly. Faintly distinguishable nucleus was in the central part of the sporozoite. This eimerian represents the first coccidian species described from subterranean African silvery mole-rat (Rodentia: Bathyergidae).
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
5. Eimeria nycteae sp. n. (Apicomplexa: Eimeriidae), a new parasite species from the snowy owl, Nyctea scandiaca
- Creator:
- Wolf, Jiří, Koudela, Břetislav, and Modrý, David
- Format:
- Type:
- model:internalpart and TEXT
- Subject:
- Apicomplexa, Eimeriidae, Eimeria nycteae sp. n., Aves, Strigifonnes, and Nyctea scandiaca
- Language:
- English
- Description:
- Coprological examinations of three snowy owls, Nyctea scandiaca (L.) revealed the presence of a coecidium of the genus Eimeria that apparently represents a previously undescribcd species. Oocysts of Eimeria nycteae sp. n. were spherical to subspherical, 23.6 (23-25) x 22.2 (22-23) pm with a shape index 1.1 (1.0-1.1). The oocyst wall was bilayered, smooth - 0.75 pin thick. A polar granule was absent. Sporocysts were ellipsoidal, 18.5 (18-19) x 9.8 (9-10) pm with a shape index 1.9 (1.8-2.1) with Stieda and substieda bodies. A sporocyst residuum was present as small granules scattered among sporozoitcs. The sequence of the sporulation process of this new species is given and illustrated with photomicrographs. Owls examined did not exhibit any signs of alteration of their health status.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
6. Infection dynamics of Cryptosporidium parvum in ICR outbred suckling mice
- Creator:
- Upton, Steve J. and Gillock, Hilary H.
- Format:
- Type:
- model:internalpart and TEXT
- Subject:
- Cryptosporidium parvum, Apicomplexa, coccidia, suckling mouse, in vivo, age, and weight
- Language:
- English
- Description:
- An ICR outbred suckling mouse model of cryptosporidiosis was used to explain some of the variability associated with experimental Cryptosporidium parvum infections in neonate mice. Fourty four groups of 12 mice each, ranging in age from 4-12 days, each received 1.0 x 104 CsCl purified oocysts per os in 5 pm PBS. At 6 days post-inoculation (PI), mice were killed by C02 overdose and individually weighed. Intestines were then homogenized and oocysts were quantified by hemacytometer. Results revealed that both age and weight have pronounced effects on numbers of oocysts produced in vivo, with larger and older mice producing higher numbers of parasites. Mice 8-9 days of age at the time of inoculation displayed the least amount of weight dependent variability, produced the highest numbers of oocysts, and were judged to be superior over other ages for pharmaceutical screening. Significant reductions in numbers of oocysts occurred in mice inoculated at 10 days of age, and only a few oocysts were found in mice inoculated at 11-12 days of age. These studies suggest that at least some data on Cryptosporidium generated from suckling mouse studies to date are probably unreliable and should be viewed skeptically.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public