Refine search
Results 331-340 of 359
Schistosoma Weinland, 1858 from Hippopotamus amphibius Linnaeus, 1758 in the Kruger National Park
1981
Pitchford, R.J. | Visser, P.S.
Schistosoma edwardiense recovered from hippopotamus, measurements of adults and eggs, species validity, determined to be hippopotamus-specific based on examination of game droppings for schistosome eggs and on lack of experimental establishment in rodents, Biomphalaria salinarum believed to be intermediate host based on evidence from experimental exposure; S. hippopotami suggested to be synonymous with S. mansoni
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
Show more [+] Less [-]Evidence, nature, and implications of the constitutive resistance to Trichinella spiralis in gallinaceous birds
1981
Barriga, O.O.
Trichinella spiralis, digestion of infective larvae is important constitutive mechanism of resistance in chickens that probably precludes transmission of infection by gallinaceous birds in nature
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 [-]Ecological studies on Ixodes (Afrixodes) matopi Spickett, Keirans, Norval & Clifford, 1981 (Acarina: Ixodidae)
1981
Colborne, J. | Norval, R.A.I. | Spickett, A.M.
Ixodes matopi, ecological study (microclimatic temperatures and relative humidities recorded in 4 habitats; seasonal and daily activity patterns; distribution of larvae, nymphs, and adults in different habitats)
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 [-]Efficacy of ivermectin against cutaneous Draschia and Habronema infection (summer sores) in horses
1981
Herd, R.P. | Donham, J.C.
Draschia, Habronema, horses, cutaneous infection (summer sores), efficacy of ivermectin
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 [-]Theileria? taurotragi: A probable agent of bovine cerebral theileriosis
1981
De Vos, A.J. | Bessenger, R. | Banting, L.F.
Theileria? taurotragi, probable cause of death of 4 calves with cerebral theileriosis: Transvaal
Show more [+] Less [-]Plasma alpha-fetoprotein concentrations in pregnant cows exposed to Sarcocystis cruzi, Campylobacter fetus, or Aspergillus fumigatus
1981
Baetz, A.L. | Crandell, S.E. | Schmerr, M.J.F. | Barnett, D. | Bryner, J.H.
Sarcocystis cruzi, pregnant cows, plasma alpha-fetoprotein concentrations, cannot be used as diagnostic tool for fetal death
Show more [+] Less [-]