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Resultados 311-320 de 360
Effects of clinical and subclinical gastrointestinal helminthiasis on digestion and energy metabolism in calves [Cooperia and Ostertagia].
1981
Randall R.W. | Gibbs H.C.
Immunogenicity of capsular antigens of Pasteurella multocida in turkeys.
1981
Kodama H. | Matsumoto M. | Snow L.M.
Experimentally induced thiamine deficiency in Beagle dogs: clinical observations.
1981
Read D.H. | Harrington D.D.
Induction of protective immunity to Strongyloides ransomi in pigs.
1981
Murrell K.D.
Longevity and productivity of Taenia taeniaeformis in cats.
1981
Williams J.F. | Shearer A.M.
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
Mostrar más [+] Menos [-]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
Mostrar más [+] Menos [-]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.
Mostrar más [+] Menos [-]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
Mostrar más [+] Menos [-]Non-specific esterase isoenzymes of adult schistosomes from the hippopotamus (Hippopotamus amphibius)
1981
Fripp, P.J.
isoenzyme patterns of extracts of adult schistosomes collected from Hippopotamus amphibius in Kruger National Park compared with similar extracts of adult Schistosoma mansoni and S. rodhaini, characteristics differed suggesting that H. amphibius schistosome is separate species
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