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Abstract

Species distribution modelling is a very useful tool in vector management. Ticks are vectors of various pathogens which cause serious problems in livestock production in tropical countries. They have a high dispersal potential which is mainly facilitated by the movement of animals from one area to...

Author(s)
Sungirai, M.; Moyo, D. Z.; Clercq, P. de; Madder, M.; Vanwambeke, S. O.; Clercq, E. M. de
Publisher
Elsevier, Amsterdam, Netherlands
Citation
Veterinary Parasitology: Regional Studies and Reports, 2018, 14, pp 41-49
Abstract

A cross-sectional survey was conducted to determine tick infestation, and udder and teat damage in 286 lactating cows and heifers at six properties in the smallholder and commercial sectors in Gwanda district of Matabeleland South Province, Zimbabwe. Eight tick species were identified: Amblyomma...

Author(s)
Ndhlovu, D. N.; Makaya, P. V.; Penzhorn, B. L.
Publisher
Onderstepoort Veterinary Institute, Onderstepoort, South Africa
Citation
Onderstepoort Journal of Veterinary Research, 2009, 76, 2, pp 235-248
Abstract

Lactating Sanga cows of the Mashona breed from Zimbabwe, receiving either a low or a high level of nutritional supplement, were exposed to 2 levels of infestation of adult R. appendiculatus in the highveld of Zimbabwe. The effect of the ticks on the milk yield was measured over an 11-week period...

Author(s)
Norval, R. A. I.; Sutherst, R. W.; Kurki, J.; Kerr, J. D.; Gibson, J. D.
Citation
Medical and Veterinary Entomology, 1997, 11, 2, pp 148-154
Abstract

The effect is reported of artificially controlled levels of infestation with adult R. appendiculatus on the milk yield of 20 commercial dairy cattle on a high plane of nutrition and 18 crossbred Bos taurus × Sanga cattle on a lower plane of nutrition in the highveld of Zimbabwe. The results showed...

Author(s)
Norval, R. A. I.; Sutherst, R. W.; Gibson, J. D.; Kerr, J. D.; Thorne, L. M.; Ellenhauge, A.
Citation
Medical and Veterinary Entomology, 1997, 11, 2, pp 155-158
Abstract

For the past decade, treatment of cattle with 0.00375% deltamethrin at 2-weekly intervals has been part of an integrated approach to counteract continuous invasion of Zimbabwe by Glossina morsitans morsitans and G. pallidipes from the Mozambique fly-belt. To determine the effect of these regular...

Author(s)
Bossche, P. van den; Mudenge, D.
Citation
Tropical Animal Health and Production, 1999, 31, 4, pp 215-222
Abstract

Theileria parva bovis (a protozoan causing January disease of cattle in Zimbabwe) was transmitted experimentally by nymphs of the tick Rhipicephalus appendiculatus to 6 of 14 cattle. Animals either became seriously ill or did not become infected. Attempts to induce mild or inapparent infection by...

Author(s)
Koch, H. T.; Kambeva, L.; Norval, R. A. I.; Ocama, J. G. R.; Munatswa, F. C.
Citation
Preventive Veterinary Medicine, 1993, 17, 1/2, pp 89-93
Abstract

Control of major livestock diseases in the tropics, such as theileriosis or trypanosomosis, is still largely based on the control of their vectors. Understanding the distribution of vectors, such as ticks and tsetse flies, is needed in order to improve the efficiency and economical viability of...

Author(s)
Garine-Wichatitsky, M. de
Publisher
New York Academy of Sciences, New York, USA
Citation
Annals of the New York Academy of Sciences, 2000, 916, pp 222-232
Abstract

Controlled repeated infestation of Bos taurus (Friesland×Hereford) and B. indicus (Brahman×Afrikander) cattle resulted in a decline in the recovery of all R. appendiculatus instars. Resistance to infestation varied between individuals although all individuals manifested severe hypersensitivity at...

Author(s)
Fivaz, B. H.; Norval, A.
Citation
Experimental & Applied Acarology, 1990, 8, 1,2, pp 51-63
Abstract

The findings of an FAO project on the effects of R. appendiculatus and A. hebraeum on productivity in cattle (performed at the veterinary field station in Mazowe in the highveld of Zimbabwe) are reviewed. [Some of this work has already been published in Veterinary Parasitology, 30: 149-164 (1988); ...

Author(s)
Norval, R. A. I.
Citation
Parassitologia (Roma), 1990, 32, 1, pp 153-163
Abstract

The effects of larvae, nymphs and adults of R. appendiculatus on the growth of Bos indicus × B. taurus (Sanga) steers and on B. taurus (Friesian × Hereford) steers and heifers was measured by exposing groups, maintained in the same pastures in Zimbabwe, to different levels of tick challenge. Larvae ...

Author(s)
Norval, R. A. I.; Sutherst, R. W.; Kurki, J.; Gibson, J. D.; Kerr, J. D.
Citation
Veterinary Parasitology, 1988, 30, 2, pp 149-164

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