Twenty-five Burchell's zebras (Equus burchelli antiquorum) which were culled at monthly intervals in the Kruger National Park were examined for helminths. Twenty-nine species of nematodes belonging ...to the families Atractidae, Habronematidae, Onchocercidae, Oxyuridae, Strongylidae, Strongyloididae and Trichostrongylidae were recovered. The cyathostomes (small strongyles) most abundant were Cyathostomum tetracanthum, Cylicostephanus calicatus, Cylindropharynx sp. (? C. intermedia Theiler, 1923) and Cylicocyclus auriculatus. Cyathostomum alveatum, Cyathostomum montgomeryi, Cylicostephanus calicatus and Cylindropharynx sp. (? C. intermedia Theiler, 1923) were the most prevalent cyathostomes (small strongyles) while Craterostomum acuticaudatum was the most prevalent of the large strongyles. Of all the species recovered those most abundant were Crossocephalus viviparus and Probstmayria vivipara with intensities of 100 to 3,857,772 and 18,400 to 104,120,467, respectively. Four new species, two Triodontophorus spp. (Strongylidae) and two Habronema spp. (Habronematidae) were identified. Furthermore, this study furnishes a first report of Triodontophorus minor in zebras. The fourth stage cyathostomes as well as the adults of 11 of the 14 species were present in significantly greater intensities in autumn and winter.
Previous studies from this laboratory have described the properties of purified luteinizing hormone (LH) and follicle-stimulating
hormone (FSH) from horse and donkey anterior pituitary glands. The ...present study afforded the opportunity to further characterize
these previously purified hormone preparations and to compare them with enriched gonadotropin fractions from zebra pituitary
glands. Although a single LH and FSH fraction was usually obtained for each pool of pituitaries, two separate zebra LH and
two donkey FSH preparations were generated. Purified hormone preparations from the horse were designated eLH and eFSH. Preparations
zLH-A, zLH-B, and zFSH were obtained from zebra pituitaries, and fractions dLH, dFSH-A, and dFSH-B were prepared from donkey
pituitary glands. These preparations were analyzed by LH and FSH radioimmunoassays (RIAs), radioreceptor assays (RRAs), LH
bioassay, and chromatofocusing. Clear immunological differences were observed between equid gonadotropins. Homologous RIAs
for eLH and eFSH did not cross-react similarly, or in a parallel fashion, with gonadotropins from the donkey and zebra. In
contrast, RIAs capable of assessing LH or FSH in a wide number of species showed all equid gonadotropin preparations to have
considerable activity and to produce parallel dilution curves. Relative to eLH (1.00), zLH-A was found to have higher LH bioactivity:LH
RIA (2.50), LH RRA:LH RIA (1.42), and LH bioactivity: LH RRA (2.21) activity ratios. The dLH and zLH-B fractions only differed
from eLH in LH RRA:LH RIA activity (0.69 and 0.62, respectively). Only LH from the horse possessed clear intrinsic FSH-receptor-binding
activity.
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Streptococcus suis infections in horses and cats Devriese, L.A; Haesebrouck, F. (Faculty of Veterinary Medicine, University of Ghent, Casinoplein 24, B9000 Ghent (Belgium))
Veterinary Record (United Kingdom),
(1992), Letnik:
130, Številka:
17
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