Document Detail

Light and electron-microscopical observations of the early developmental stages of Theileria sergenti in the gut of Haemaphysalis longicornis.
MedLine Citation:
PMID:  8286540     Owner:  NLM     Status:  MEDLINE    
Morphological characteristics of the early developmental stages of Theileria sergenti in the vector tick were observed by light and electron-microscopies and compared with those of other Theileria species. Just before the repletion of nymphs, various stages of the parasite were observed in gut contents of tick by light microscopy: the spherical intra-erythrocytic stage, the ring-form stage, the spindle-shaped stage and the round-form stage. Electron microscopy revealed that the spherical intra-erythrocytic stages were 1-2 microns in diameter and were marginally located in host erythrocytes. The organisms liberated from host erythrocytes into the tick gut lumen had a large nucleus, an endoplasmic reticulum, electron dense-organelles and a double-walled, mitochondrion-like organelle. In addition ticks had ray-bodies in the gut lumen. These bodies had short protrusions containing 1-3 microtubules and a labyrinthine structure containing highly electron-dense organelles, so they were considered as the developing microgamont of T. sergenti.
S Kawai; K Takahashi; T Kurosawa; M Sonoda
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The Journal of veterinary medical science / the Japanese Society of Veterinary Science     Volume:  55     ISSN:  0916-7250     ISO Abbreviation:  J. Vet. Med. Sci.     Publication Date:  1993 Oct 
Date Detail:
Created Date:  1994-02-22     Completed Date:  1994-02-22     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9105360     Medline TA:  J Vet Med Sci     Country:  JAPAN    
Other Details:
Languages:  eng     Pagination:  837-9     Citation Subset:  IM    
Department of Veterinary Internal Medicine, School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu, Japan.
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MeSH Terms
Digestive System / parasitology
Microscopy, Electron
Theileria / cytology*,  physiology*,  ultrastructure
Ticks / parasitology*

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