Scanning electron microscopy of Strongylus spp. in zebra

Show simple item record Els, H.J. Malan, F.S. Scialdo-Krecek, Rosina C.
dc.contributor.editor Bigalke, R.D. 2015-11-20T13:30:58Z 2015-11-20T13:30:58Z 2015 1983
dc.description The articles have been scanned in colour with a HP Scanjet 5590; 600dpi. Adobe Acrobat XI Pro was used to OCR the text and also for the merging and conversion to the final presentation PDF-format. en_ZA
dc.description.abstract The external ultrastructure of the anterior and posterior extremities of the nematodes, Strongylus asini, Strongylus vulgaris, Strongylus equinus and Strongylus edentatus, was studied with scanning electron microscopy (SEM). Fresh specimens of S. asini were collected from the caecum, ventral colon and vena portae of Equus burchelli and Equus zebra hartmannae; S. vulgaris from the caecum, colon and arteria ileocolica of E. burchelli; S. equinus from the ventral colon of E. z. hartmannae and S. edentatus from the caecum and ventral colon of both zebras, during surveys of parasites in zebras in the Etosha Game Reserve, South West Africa/Namibia, and the Kruger National Park, Republic of South Africa. The worms were cleaned, fixed and mounted by standard methods and photographed in a JEOL JSM- 35C scanning electron microscope (SEM) operating at 12kV. The SEM showed the following differences: the tips of the external leaf-crowns varied and were fine and delicate in S. asini, coarse and broad in S. vulgaris and, in S. equinus and S.edentatus, closely adherent, separating into single elements for half their length. The excretory pores showed only slight variation, and the morphology of the copulatory bursae did not differ from those seen with light microscopy. The genital cones differed markedly: S. asini had a ventral triangular projection and laterally 2 finger-like projections: in S. vulgaris there were numerous bosses on the lateral and ventral aspects of the cone; in S. equinus 2 finger-like processes projected laterocaudally; and in S. edentatus 2 pairs of papilla-like processes projected laterally on the ventral aspects, and a pair of rounded projections and a pair of hair-like structures adorned the dorsal aspects. The most significant micrograph was the shedding of the cuticle of the 4th moult of a female S. asini. en_ZA
dc.description.sponsorship University of Pretoria. Council for Scientific and Industrial Research. Department of Agriculture and Fisheries of South Africa. en_ZA
dc.identifier.citation Els, HJ, Malan, FS & Scialdo-Krecek, RC 1983, 'Scanning electron microscopy of Strongylus spp. in zebra’, Onderstepoort Journal of Veterinary Research, vol. 50, no. 4, pp. 257-265. en_ZA
dc.identifier.issn 0330-2465
dc.language.iso en en_ZA
dc.publisher Published by The Government Printer, Pretoria en_ZA
dc.rights ©ARC - Onderstepoort and Faculty of Veterinary Science, University of Pretoria (original). ©University of Pretoria. Dept. of Library Services (digital). en_ZA
dc.subject Veterinary medicine en_ZA
dc.subject.lcsh Veterinary medicine -- South Africa
dc.title Scanning electron microscopy of Strongylus spp. in zebra en_ZA
dc.type Article en_ZA

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