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2. Extraintestinal stages of coccidia in liver of Schneider’s skink Eumeces schneideri (Sauria: Scincidae) from Northern Egypt
- Creator:
- Koudela, Břetislav and Modrý, David
- Format:
- Type:
- model:internalpart and TEXT
- Subject:
- extraintestinal tissue cysts, liver, sporozoite, crystalloid body, Isospora, and Reptilia
- Language:
- English
- Description:
- An extrainlestinal coccidian parasite was identified in Schneider’s skinks Eumeces schneideri Daudin, 1802. Numerous tissue cysts were found in melanomacrophage aggregations in the liver of six of ten examined skinks. No tissue cysts were found in other tissues. Tissue cysts were 22-26 x 9-13 pm and contained a single sporozoite. Sporozoitcs were 10-13 x 2-4 pm, and contained a single nucleus, homogeneous inclusion and PAS positive granules, and were surrounded by PAS negative, 1.5-3.0 pm thick cyst wall. Transmission electron microscopy revealed that the tissue cyst wall was composed of granular material and the sporozoites contained crystalloid body with regular arrangements of units. Appearance of tissue cyst and structure of crystalloid body indicate that Schneider's skinks represent a paratenic host for non-determined Isospora species.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
3. Intestinal microsporidiosis in African skink Mabuya perrotetii
- Creator:
- Koudela, Břetislav, Didier, Elisabeth S., Rodgers, Linda B., and Modrý, David
- Format:
- Type:
- model:internalpart and TEXT
- Subject:
- microsporidia, Reptilia, Encephalitozoon, electron microscopy, PCR-RFLP, and heteroduplex mobility
- Language:
- English
- Description:
- Intestinal microsporidiosis was documented by detecting abundant slightly curved spores (2.9 x 1.2 pm) in the faeces of five of twelve skinks Mabuya perrotetii Duméril et Bibron, 1839 that originated from Ghana. Clinically, the microsporidiosis was characterized by decreased appetite, diarrhea, and weight loss. Histopathological changes consisted of villous atrophy, blunting of mucosa and flattening of individual epithelial cells in the large intestine. The ultrastructure of microsporidian spores was consistent with an Encephalitozoon species. The PCR-RFLP assay and the heleroduplex mobility shift analyses were used to verify that the skink microsporidian is a species of the genus Encephalitozoon Levaditi, Nicolau et Schoen, 1923 and indicate that this microsporidian is not E. hellem, E. intestinalis or a strain of E. cuniculi. The microsporidia in African skink represent an Encephalitozoon species morphologically identical to Encephalitozoon lacerine Canning, 1981.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public
4. New species of Cryptosporidium (Apicomplexa: Cryptosporidiidae) from lizards
- Creator:
- Koudela, Břetislav and Modrý, David
- Format:
- Type:
- model:internalpart and TEXT
- Subject:
- Reptilia, Sauria, Cryptosporidium saurophilum sp, n., and transmission studies
- Language:
- English
- Description:
- A new Cryptosporidium species, C. saurophilum, is described from Schneider’s skinks Eumeces schneidert Daudin, 1802. Oocysts were fully sporulated in fresh faeces and measured 5.0 x 4.7 pm (4.4-5.6 x 4.2-5.2 pm). The new species differs from C. serpentis Levine, 1980 by having smaller oocysts, developing in a different location of intestine, and by the inability to infect snakes.
- Rights:
- http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public