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Observations on the transmission of Theileria mutans in South Africa
1981
De Vos, A.J. | Roos, J.A.
Theileria mutans, 4 isolates obtained from geographically distant parts of South Africa by subinoculation of infected blood were readily transmitted to cattle by Amblyomma hebraeum, all attempts to transmit these isolates with Rhipicephalus appendiculatus were unsuccessful
Show more [+] Less [-]Studies on a bovine Babesia transmitted by Hyalomma marginatum rufipes Koch, 1844
1981
Gray, J.S. | De Vos, A.J.
Babesia occultans n. sp. originally obtained from engorged female Hyalomma marginatum rufipes collected from cattle in Northern Transvaal, transmission studies in laboratory strain of ticks and splenectomized cattle, morphological, serological, and cross-immunity studies distinguished parasite as previously undescribed species highly infective for H. marginatum rufipes but of low virulence in cattle, unsuccessful attempt to transmit transovarially with Boophilus microplus
Show more [+] Less [-]Some effects of 60CO irradiation on Cowdria ruminantium in its tick host Amblyomma hebraeum Koch (Acarina: Ixodidae)
1981
Amblyomma hebraeum, 60CO irradiation of nymphs failed to attenuate Cowdria ruminatium
Show more [+] Less [-]Isolation and transmission of an unidentified Babesia sp. infective for cattle
1981
Thomas, S.E. | Mason, T.E.
Babesia sp. in Hyalomma marginatum rufipes, laboratory transmission to susceptible cattle achieved both biologically (tick feeding) and mechanically (injection of infected blood), low pathogenicity, apparently not transmissible to horses
Show more [+] Less [-]Staining characteristics of colonies of Anaplasma marginale Theiler in Dermacentor andersoni Stiles
1981
Oberst, R.D. | Kocan, K.M. | Hair, J.A. | Ewing, S.A.
Anaplasma marginale, several techniques used to determine effectiveness of stains for demonstrating colonies of Anaplasma in Dermacentor andersoni
Show more [+] Less [-]The retention of Babesia bigemina infection by Boophilus decoloratus exposed to imidocarb dipropionate during engorgement
1981
Gray, J.S. | Potgieter, F.T.
Babesia bigemina infection in population of Boophilus decoloratus cannot be eliminated in short term by treating cattle prophylactically with imidocarb dipropionate, Babesia retained by ticks for at least complete generation
Show more [+] Less [-]An investigation into the toxic principle in eggs of the tick Amblyomma hebraeum
1981
Amblyomma hebraeum, purification procedure used to obtain pure toxic components of tick eggs, characterization of toxin structure, histopathologic lesions observed in guinea pigs inoculated with egg extract or purified toxin, lesions in guinea pigs inoculated with crude egg extracts of 3 other ticks were histopathologically similar
Show more [+] Less [-]Ixodes (Afrixodes) matopi n. sp. (Acarina: Ixodidae): A tick found aggregating on pre-orbital gland scent marks of the klipspringer in Zimbabwe
1981
Spickett, A.M. | Keirans, J.E. | Norval, R.A.I. | Clifford, C.M.
Ixodes (Afrixodes) matopi n. sp. is described from females and males collected off twigs bearing deposits of intraspecific communication marks secreted by the pre-orbital glands of the klipspringer Oreotragus oreotragus and from laboratory-reared immature specimens. One female was also found on a goat. The 4 collections were all from Zimbabwe, 3 of them from Matabeleland South Province and the fourth from Inyanga District, Zimbabwe.
Show more [+] Less [-]Rhipicephalus zambeziensis sp. nov., a new tick from eastern and southern Africa, together with a redescription of Rhipicephalus appendiculatus Neumann, 1901 (Acarina, Ixodidae)
1981
Walker, J.B. | Norval, R.A.I. | Corwin, M.D.
Rhipicephalus zambeziensis n. sp., all stages of life cycle compared with life cycle of R. appendiculatus, redescription of R. appendiculatus, attempts to cross breed these 2 species in laboratory were unsuccessful thus validating their taxonomic separation, the 2 species can live sympatrically
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