Switch to
| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:issue |
5
|
| pubmed:dateCreated |
1988-2-25
|
| pubmed:abstractText |
A transmission electron microscopic study of the intra-erythrocytic stages of a pathogenic Theileria parva from cattle and a previously uncharacterized Theileria sp. from waterbuck (Kobus defassa) in Kenya revealed several novel ultrastructural features, associated with feeding and multiplication, in these parasites. In trophozoites a connecting channel was observed between the parasite's cytostome and its intracytoplasmic food vacuole. In some cases the limiting membrane of the food vacuole was seen to be continuous with a close-meshed network of membrane-bounded, anastomosing tubules. This labyrinthine structure, which has not been described previously, may function as a digestive organelle in theilerial trophozoites. Electron micrographs also revealed the mode of intra-erythrocytic multiplication of these parasites in vivo. Prior to division, electron-dense cisternae and rhoptries appeared beneath the parasite's plasmalemmal membrane, marking the sites of merozoite formation. From a single parasite, a maximum of four merozoites were formed by schizogonous division and subsequently separated from a residual body by constriction at the base of each merozoite. In addition, observations on two double-membraned organelles seen in trophozoites and the intra-erythrocytic crystalline structures associated with Theileria sp. in waterbuck are reported.
|
| pubmed:language |
eng
|
| pubmed:journal | |
| pubmed:citationSubset |
IM
|
| pubmed:status |
MEDLINE
|
| pubmed:issn |
0040-8166
|
| pubmed:author | |
| pubmed:issnType |
Print
|
| pubmed:volume |
19
|
| pubmed:owner |
NLM
|
| pubmed:authorsComplete |
Y
|
| pubmed:pagination |
643-55
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| pubmed:dateRevised |
2003-11-14
|
| pubmed:meshHeading | |
| pubmed:year |
1987
|
| pubmed:articleTitle |
Ultrastructure of the intra-erythrocytic stage of Theileria species from cattle and waterbuck.
|
| pubmed:affiliation |
International Laboratory for Research on Animal Diseases, Nairobi, Kenya.
|
| pubmed:publicationType |
Journal Article
|