| 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 ... | 1992 | 1297955 |
| transmission and diagnosis of equine babesiosis in south africa. | the transmission and prevalence of babesia equi and b. caballi are being studied. rhipicephalus evertsi mimeticus an ixodid tick from namibia was identified as a new vector of b. equi, however, r. turanicus, previously reported to be a vector, failed to transmit both b. equi and b. caballi in the laboratory. the accurate diagnosis of b. caballi is being investigated because the nature of its low level parasitaemia does not allow easy detection in thin blood smears, routinely used for diagnosis, ... | 1992 | 1343683 |
| experimental studies on the replication and transmission of crimean-congo hemorrhagic fever virus in some african tick species. | seven african tick species were studied as potential vectors of crimean-congo hemorrhagic fever (cchf) virus. engorged nymphae of 4 ixodid species, hyalomma marginatum rufipes, h. truncatum, rhipicephalus evertsi mimeticus, and amblyomma hebraeum, were inoculated intracoelomically with cchf virus and assayed for virus content at varying times post-inoculation. the virus replicated in all 4 species, reaching maximum titers of 4.6-5.5(10) fluorescence focus units per ml on days 5-9 post-inoculatio ... | 1989 | 2494900 |
| [development and reproduction of rhipicephalus evertsi mimeticus (donitz, 1910). 1. the biology of reproduction]. | | 1986 | 3727870 |
| [development and reproduction of rhipicephalus evertsi mimeticus (donitz, 1910). 2. the biology of development]. | | 1986 | 3727871 |
| the experimental transmission of theileria ovis by rhipicephalus evertsi mimeticus and r. bursa. | | 1972 | 4197846 |
| seasonal prevalence of ixodid ticks on cattle in the windhoek district of south west africa/namibia. | the seasonal prevalence of ixodid ticks was determined over a 2-year period by the weekly removal from at least 5 cattle of all adult ticks and the immature stages of rhipicephalus evertsi mimeticus in the ears. the highest mean weekly burden was 286,6 adult ticks/cow/week in march 1979, and the lowest 6,9 adult ticks/cow/week in july 1979. virtually no tick control is practised in this area. rhipicephalus capensis group adults peaked in the summer from october to march/april. rhipicephalus ever ... | 1984 | 6533509 |
| 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 ... | 1984 | 6533510 |
| observations on cattle ticks in huila province (angola). | in huila province of angola, 3864 ticks were collected during a parasitological survey carried out in the rainy season from october 1990 to april 1991. the samples were collected from cattle gathered for the annual vaccination campaign against contagious bovine pleuropneumonia, anthrax and blackleg in 18 veterinary stations of six municipalities. after tick classification, the following proportions of ticks were obtained: rhipicephalus evertsi mimeticus (27.1%), amblyomma pomposum (26.4%), booph ... | 1994 | 8171837 |
| seasonal patterns of hormones, macroparasites, and microparasites in wild african ungulates: the interplay among stress, reproduction, and disease. | sex hormones, reproductive status, and pathogen load all affect stress. together with stress, these factors can modulate the immune system and affect disease incidence. thus, it is important to concurrently measure these factors, along with their seasonal fluctuations, to better understand their complex interactions. using steroid hormone metabolites from fecal samples, we examined seasonal correlations among zebra and springbok stress, reproduction, gastrointestinal (gi) parasite infections, an ... | 2015 | 25875647 |
| investigations into the paralysis-inducing ability of rhipicephalus evertsi mimeticus and that of hybrids between this subspecies and rhipicephalus evertsi evertsi. | studies performed on sheep showed that rhipicephalus evertsi mimeticus is a paralysis-competent tick species whose toxicity is either the same as, or only slightly less than that of r.e. evertsi. it was also proved that the paresis or paralysis induced by the mimeticus females is characterized by a constant incubation period which is independent of the tick infestation rate and body mass of the host, and consequently of its age. this period is entirely determined by the state of repletion of the ... | 1986 | 3960488 |
| [the subspecific validity of rhipicephalus evertsi mimeticus donitz, 1910]. | | 1986 | 3705799 |
| [interaction of temperature and relative humidity on preimaginal stages of rhipicephalus evertsi mimeticus off the host]. | | 1987 | 3439392 |
| [interactions of temperature and relative humidity on the adult phase of rhipicephalus evertsi mimeticus off the host]. | | 1987 | 3434029 |
| on the morphology and organization of the eye of unfed adult rhipicephalus evertsi mimeticus (acari: ixodidae). | investigations by scanning and transmission electron microscopy and freeze-etching revealed that eyes of adult rhipicephalus evertsi mimeticus consist of a lens and photoreceptor cells, which are separated by an acellular layer and the hypodermis. the lens contains numerous pore channels, which open beneath the epicuticula of the outer portion, converge uninterrupted to the inner closure and end in approximately 420 pore fields. the inner closure of the lens is formed as a deep circular invagina ... | 1990 | 2352920 |
| on the reaction of adult rhipicephalus evertsi mimeticus and hyalomma truncatum to horizontally incidenting optical radiation of various wavelengths ranges and different irradiances and to optical radiation of a sun-simulating wavelength spectrum. | the valence of horizontally incidenting light/optical radiation for host-seeking-inclined ixodid ticks was investigated by exposing male and female adults of rhipicephalus evertsi mimeticus and hyalomma truncatum to narrow-band monochromatic radiation in the wavelength range of 300-801 nm at irradiances corresponding to an overcast to clear sunny day, a cloudy day and a full-moon night as well as to optical radiation of a sun-simulating wavelength spectrum of 190-2600 nm within a test chamber fr ... | 1991 | 1866424 |
| distribution of endemic and introduced tick species in free state province, south africa. | the distributions of endemic tick vector species as well as the presence of species not endemic to free state province, south africa, were determined during surveys or opportunistic collections from livestock, wildlife and vegetation. amongst endemic ticks, the presence of rhipicephalus appendiculatus was confirmed in the north of the province, whilst rhipicephalus decoloratus was collected at 31 localities mostly in the centre and east, and ixodes rubicundus at 11 localities in the south, south ... | 2015 | 26244582 |
| bunyavirus-vector interactions. | the bunyaviridae family is comprised of more than 350 viruses, of which many within the hantavirus, orthobunyavirus, nairovirus, tospovirus, and phlebovirus genera are significant human or agricultural pathogens. the viruses within the orthobunyavirus, nairovirus, and phlebovirus genera are transmitted by hematophagous arthropods, such as mosquitoes, midges, flies, and ticks, and their associated arthropods not only serve as vectors but also as virus reservoirs in many cases. this review present ... | 2014 | 25402172 |
| ehrlichia ruminantium variants which do not cause heartwater found in south africa. | in 1994 a batch of apparently healthy goats was selected for intended export to the usa from a heartwater-free and vector tick-free region of south africa. the animals were tested serologically for heartwater, using either or both an ifa and an elisa test, and 52% were found to be serologically positive. a pcr assay based on ehrlichia ruminantium 16s gene sequences gave positive results for 54% of the animals, suggesting that apparently non-pathogenic e. ruminantium variants existed in this hear ... | 2007 | 17123750 |