Zobrazeno 1 - 10
of 39
pro vyhledávání: '"R. A I Norval"'
Publikováno v:
Medical and Veterinary Entomology. 11:143-147
The effects of adults of the bont tick. Amblyomma hebraeum on the milk production of Sanga and Sanga x zebu (Brahman) cattle were measured over a period of I I weeks in the lowveld of Zimbabwe in the summer of 1986. Four groups of lactating cows, con
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::074c02c55a774fb208b491f871078a31
https://doi.org/10.1111/j.1365-2915.1997.tb00304.x
https://doi.org/10.1111/j.1365-2915.1997.tb00304.x
Publikováno v:
Medical and Veterinary Entomology. 11:148-154
Lactating Sanga cows of the Mashona breed from Zimbabwe, receiving either a low or high level of nutritional supplement, were exposed to two levels of infestation of adults of the brown ear-tick, Rhipicephalus appendiculatus in the highveld of Zimbab
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::baac06a3dd3ed7fed2913dd4167d1f12
https://doi.org/10.1111/j.1365-2915.1997.tb00305.x
https://doi.org/10.1111/j.1365-2915.1997.tb00305.x
Publikováno v:
Medical and Veterinary Entomology. 10:149-154
A self-medicating applicator for killing ticks on deer and domestic ungulates by passive transfer of acaricides during feeding is described. The applicator consists of a barrel divided into a food bin (above) and a sealed self-contained acaricide res
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5f26ec0161abb5171092e8b425f13aee
https://doi.org/10.1111/j.1365-2915.1996.tb00721.x
https://doi.org/10.1111/j.1365-2915.1996.tb00721.x
Publikováno v:
Tropical Animal Health and Production. 27:129-144
The effects of ticks and tick-borne disease infections on the lactation and weight gain of Mashona cattle were studied at Mbizi Quarantine Station in the south-eastern lowveld of Zimbabwe. Twenty-nine Mashona cows were allocated to 2 balanced groups
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f89fd04003a9aeacb8337f7ec2612c7a
https://doi.org/10.1007/bf02248956
https://doi.org/10.1007/bf02248956
Autor:
R. A. I. Norval
Publikováno v:
International Journal of Tropical Insect Science. 13:489-494
Amblyomma hebraeum differs from many ixodid tick species in that it is not susceptible to the direct effects of the host immune response. All stages of the life cycle are able to feed repeatedly on laboratory hosts and show no progressive declines in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6e7f12c6e0283402cf46876364dc5a4a
https://doi.org/10.1017/s1742758400016064
https://doi.org/10.1017/s1742758400016064
Publikováno v:
Experimental & Applied Acarology. 13:11-18
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7b0ef4ff23e182c166e2913031fc49f5
https://doi.org/10.1007/bf01268935
https://doi.org/10.1007/bf01268935
Publikováno v:
Journal of Insect Behavior. 3:557-565
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b1b83032c0cbe80cfe85eba4e4b81cda
https://doi.org/10.1007/bf01052018
https://doi.org/10.1007/bf01052018
Publikováno v:
Veterinary Parasitology. 36:277-283
Cowdria ruminantium (heatwater) infection rates of field populations of the bont tick, Amblyomma hebraeum, were determined at two locations in the southern lowveld of Zimbabwe. At Mbizi Quarantine Station, unfed adult males and females, and nymphs we
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::327cfd69e1f11f959d48a450652c1145
https://doi.org/10.1016/0304-4017(90)90039-e
https://doi.org/10.1016/0304-4017(90)90039-e
Autor:
L. Chieves, J. R. Livengood, C. Smith, John B. Dame, Jennifer Ann Marie Calder, R. A. I. Norval, G.R. Reddy, R. Littell, C. H. Courtney
Publikováno v:
ResearcherID
The sensitivity and specificity of PCR tests based on the small-subunit rRNA gene sequence of Babesia bovis were compared in a blind study of experimentally infected cattle with the corresponding parameters of the complement fixation (CF) test curren
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::53b4bdfa0df57b5e76f808ab0f22bc05
https://pubmed.ncbi.nlm.nih.gov/8897177
https://pubmed.ncbi.nlm.nih.gov/8897177
Publikováno v:
Experimentalapplied acarology. 20(10)
Infestations of adults and nymphs of Amblyomma hebraeum were counted on Brahman (Br), Brahman x Simmental (BS), Sanga (Sa) and Hereford (He) steers exposed to infested pastures at Mbizi in southern Zimbabwe in 1986-1987. Herefords were always the mos
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::16f8326576b221a839e8c934682e9825
https://pubmed.ncbi.nlm.nih.gov/8952073
https://pubmed.ncbi.nlm.nih.gov/8952073