Publications

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arthropod parasites of springbok, gemsbok, kudus, giraffes and burchell's and hartmann's zebras in the etosha and hardap nature reserves, namibia.a total of 48 springbok, 48 gemsbok, 23 kudus and 6 giraffes were examined for ticks and lice, while 9 burchell's zebras and 6 hartmann's mountain zebras were examined only for ticks. springbok and gemsbok were shot in both the etosha national park in the north and the hardap nature reserve in the south of namibia. all the other animals were shot in the etosha national park. a total of 7 ixodid tick species and 8 lice species were recovered. the springbok carried few ticks. the adults of a rhipi ...19921297955
arthropod parasites of hartmann's mountain zebra, equus zebra hartmannae, in south west africa/namibia.twelve hartmann's mountain zebra, equus zebra hartmannae, were shot for arthropod parasite recovery during the period june 1980-june 1981 on a farm in the khomas hochland region of south west africa/namibia. four species of gasterophilus larvae, 1 species of rhinoestrus larvae and 3 ixodid tick species were recovered. the seasonal prevalence of the gasterophilus species larvae and of rhipicephalus evertsi mimeticus was determined. three horses examined on the same farm were infested with larvae ...19846533510
studies on the parasites of zebras. iv. cylicodontophorus reineckei n.sp. (nematoda: strongylidae) from the burchell's zebra, equus burchelli antiquorum h. smith, 1841 and the mountain zebra, equus zebra hartmannae matschie, 1898.a new species of nematode, cylicodontophorus reineckei, was collected from burchell's zebra, equus burchelli antiquorum h. smith, 1841, in both the etosha national and kruger national parks and from mountain zebra, equus zebra hartmannae matschie, 1898, in the namib naukluft park in south west africa/namibia. these nematodes have an external leaf-crown with longer elements than those of the internal leaf-crown and a well-developed dorsal gutter. the very well-developed oesophageal funnel is both ...19846533516
horse haemoglobin phenotyping by agarose gel isoelectric focusing comparison of thoroughbreds with other equidae.by using isoelectric focusing in thin agarose slab gels 1049 thoroughbred, 82 nooitgedachter, 45 percheron and 244 horses of other breeds were examined. the numbers of other equidae tested were 107 donkeys, 50 mules, 4 common zebras (equus burchelli boehmi) and 8 mountain zebras (equus zebra hartmannae). phenotypic data are presented for all tested animals and gene frequencies are calculated for the horses.19846742514
chromosomal distribution of the telomere sequence (ttaggg)(n) in the equidae.telomeres are a class of repetitive dna sequences that are located at chromosome termini and that act to stabilize the chromosome ends. the rapid karyotypic evolution of the genus equus has given rise to ten taxa, all with different diploid chromosome numbers. using fluorescence in situ hybridization (fish) we localized the mammalian telomere sequence, (ttaggg)(n), to the chromosomes of nine equid taxa. ttaggg signal was located at chromosome termini in all species, however additional signal was ...200111474195
chromosome homologies between man and mountain zebra (equus zebra hartmannae) and description of a new ancestral synteny involving sequences homologous to human chromosomes 4 and 8.using human chromosome painting probes, we looked for homologies between human and mountain zebra (equus zebra hartmannae, equidae, perissodactyla) karyotypes. except for two very short segments, all euchromatic regions were found to have a human homologous chromosome segment. conserved syntenies previously described in various mammalian orders were detected. each synteny corresponded to a chromosomal region homologous to two parts of human chromosomes: hsa3 and hsa21, hsa7 and hsa16, hsa12 and ...200111528128
comparative mapping in equids: the asine x chromosome is rearranged compared to horse and hartmann's mountain zebra.the x chromosomes of the extant equids, in general, share morphology and banding pattern similarities. however, the donkey x is, in part, an exception because of significantly different centromeric index and variant banding patterns in the pericentromeric region. to verify the underlying molecular basis of this difference, twelve equine bac clones were fish mapped to donkey (eas) and hartmann's mountain zebra (ezh) metaphase spreads. loci from the terminal region of xp and distal to terminal reg ...200212438800
interstitial telomeric sites and nors in hartmann's zebra (equus zebra hartmannae) chromosomes.interstitial telomeric sites (itss) are considered as signatures of chromosomal rearrangements that take place during karyotype evolution. understanding that equids have undergone rapid karyotype evolution compared with the average in other mammals, a search of these signatures was carried out in the hartmann's mountain zebra (equus zebra hartmannae; ezh) chromosomes. six consistent itss were identified on five of the zebra chromosomes (ezh1p, 1q, 2q, 5q, 6q and 11q). the location of these itss ...200212498342
a comparison of the intestinal helminth communities of equidae in southern africa.the intestinal helminth communities of 8 horses, 12 donkeys, 21 hartmann's mountain zebras, and 44 burchell's zebras were compared using the original data from 6 studies in south africa and namibia. necropsy and worm recovery techniques were comparable between the studies. sixty helminth species (58 nematode, 1 cestode, and 1 trematode species) were recorded. there were significant differences in the helminth community structures of the 4 equus species. the helminth communities of the 2 closely ...200415715215
mass spectral analysis of domestic and wild equine apoa-i and a-ii: detection of unique dimeric forms of apoa-ii.in pigs, humans, chimpanzees and probably other great apes, a cysteine at residue 6 enables apolipoprotein a-ii to form a homodimer. however, the apoa-iis of other primates, lacking a cysteine residue, are monomeric. we have already reported that horse apoa-iis form homodimers due also to a cysteine at residue 6. in this study, we wanted to determine whether other equine apoa-iis might be monomeric. the high density lipoproteins were ultracentrifugally isolated from the plasmas of a horse (equus ...200516230041
sequencing of cdna and proximal promoter of equine hexokinase ii gene.in order to investigate the utilization of glucose in equine skeletal muscle, we determined the coding and proximal promoter sequences of the hexokinase type ii (hkii) gene in thoroughbred horse, grevy's zebra and hartmann's mountain zebra. the deduced amino acid sequence of thoroughbred horse hkii showed 100, 100, 94.4, 92.7 and 92.6% identities with grevy's zebra, hartmann's mountain zebra, human, mouse and rat hkiis, respectively. in equine hkiis, specific amino acid substitutions, ile 159 an ...200717454005
a serologic and polymerase chain reaction survey of equine herpesvirus in burchell's zebras (equus quagga), hartmann's mountain zebras (equus zebra hartmannae), and thomson's gazelles (eudorcas thomsonii) in a mixed species savannah exhibit.reports of equine herpesvirus (ehv) 1 and ehv-9 causing clinical disease in a wide range of species have been well documented in the literature. it is thought that zebras are the natural hosts of ehv-9 both in the wild and in captive collections. concerns about potential interspecies transmission of ehv-1 and ehv-9 in a mixed species savannah exhibit prompted serologic and polymerase chain reaction surveys. eighteen burchell's zebras ( equus quagga ), 11 hartmann's mountain zebras ( equus zebra ...201628080902
reproduction in female hartmann's zebra, equus zebra hartmannae.ovaries, fetuses and plasma were collected from zebra mares shot in the etosha national park in namibia between 15 and 25 august 1983. ovarian weight was affected by reproductive status and most of the non-pregnant mares were anoestrous. the number of follicles varied between individuals and only pro-oestrous/oestrous mares had follicles larger than 20 mm in diameter. the largest follicle in pregnant mares was only 9 mm in diameter. corpora lutea and corpora albicantia were found in non-pregnant ...19883199369
studies on the parasites of zebra. ii. cylicostephanus longiconus n. sp. (nematoda: stronglyidae) from the mountain zebra, equus zebra hartmannae (matschie, 1898).a new species of nematode, cylicostephanus longiconus, was collected from mountain zebra, equus zebra hartmannae (matschie, 1898), on the kelpie farm in the khomas hochland, south west africa/namibia. these nematodes have 1 large dorsal and 2 small subventral teeth in the oesophageal funnel and submedian papillae with very long tips. the males have a very well-developed dermal collar and genital cone.19836646657
enterolithiasis in a confined hartman's mountain zebra.enterolithiasis was observed on necropsy of a hartman's mountain zebra (equus zebra hartmannae). a single enterolith had caused obstruction and rupture of the small colon. the gross lesions are described and the possible etiology discussed.19751152174
evidence of african horse sickness virus infection of equus zebra hartmannae in the south-western khomas region, namibia.equine mortalities suspected to be due to african horse sickness (ahs) were reported from the arid khomas region, namibia, in 2008. the area was previously considered a localized ahs-free area. hartmann's mountain zebra (equus zebra hartmannae), a potential but unconfirmed reservoir host of african horse sickness virus (ahsv), occurs in the region. between 2009 and 2010 serum, blood and tissue samples from 31 culled e. z. hartmannae were analysed by reverse transcription-polymerase chain reactio ...201728406577
contrasting results from molecular and pedigree-based population diversity measures in captive zebra highlight challenges facing genetic management of zoo populations.zoo conservation breeding programs manage the retention of population genetic diversity through analysis of pedigree records. the range of demographic and genetic indices determined through pedigree analysis programs allows the conservation of diversity to be monitored relative to the particular founder population for a species. such approaches are based on a number of well-documented founder assumptions, however without knowledge of actual molecular genetic diversity there is a risk that pedigr ...201727981608
klossiella equi infection in a hartmann's mountain zebra (equus zebra hartmannae).an 18-mo-old female hartmann's mountain zebra (equus zebra hartmannae) died secondary to a traumatically induced cervical fracture. microscopic examination of renal tissues revealed occasional coccidian sporocysts and budding sporonts containing sporoblasts encased within a bilaminated cell membrane within the renal tubules, compatible with a morphologic diagnosis of klossiella equi, a coccidian parasite of renal parenchyma in equids. repeated urinalyses of several hartmann's mountain zebra fail ...200617319148
scanning electron microscopy of strongylus spp. in zebra.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. ...19836676687
studies on the parasites of zebras. v. nematodes of the burchell's and hartmann's mountain zebras from the etosha national park, south west africa/namibia.nine burchell's and 6 hartman's mountain zebras were culled during the 3 climatic periods characteristic of the etosha national park, south west africa/namibia, and were examined for helminths. the burchell's zebras ranged in age from 4 1/2 to 19 years and the mountain zebras from 3 1/2 to 13 years. twenty-five species of nematodes, belonging to the families atractidae, strongylidae, oxyuridae, onchocercidae and habronematidae, were recovered. of the family cyathostominae, the following species ...19873587931
karyotypic relationships among equus grevyi, equus burchelli and domestic horse defined using horse chromosome arm-specific probes.using laser microdissection we prepared a set of horse chromosome arm-specific probes. most of the probes were generated from horse chromosomes, some of them were derived from equus zebra hartmannae. the set of probes were hybridized onto e. grevyi chromosomes in order to establish a genome-wide chromosomal correspondence between this zebra and horse. the use of arm-specific probes provided us with more information on the mutual arrangement of the genomes than we could obtain by means of whole-c ...200717874215
in vitro maturation and fertilization of oocytes recovered from free-ranging burchell's zebra (equus burchelli) and hartmann's zebra (equus zebra hartmannae).a noninvasive repeatable method to harvest oocytes for in vitro fertilization (ivf) could potentially be used to assist reproduction in endangered equid species. the objectives of this study were to evaluate a specific transvaginal ultrasound-guided oocyte recovery procedure for use in zebra mares and the general applicability of ivf procedures in zebra. ovaries were collected from burchell's zebra (equus burchelli) and hartmann's zebra (equus zebra hartmannae) mares at routine culling for expt. ...19979365936
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