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VetMed Resource

Veterinary information to support practice, based on evidence and continuing education

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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 study vertical transmission of C. ruminantium from cows to their calves was demonstrated. 12 mixed-breed calves, born to dams living in a heartwater-endemic area of Zimbabwe, were tested postnatally for the presence of C. ruminantium. Vertical transmission was demonstrated to occur under...

Author(s)
Deem, S. L.; Norval, R. A. I.; Donachie, P. L.; Mahan, S. M.
Citation
Veterinary Parasitology, 1996, 61, 1/2, pp 119-132
Abstract

The occurrence of endemic stability for heartwater is a controversial issue, because the means by which young cattle and other neonatal ruminants become infected and acquire immunity to the disease have never been adequately explained. A study was conducted in a heartwater-endemic area in...

Author(s)
Norval, R. A. I.; Donachie, P. L.; Meltzer, M. I.; Deem, S. L.; Mahan, S. M.
Citation
Veterinary Parasitology, 1995, 58, 4, pp 335-352
Abstract

29 Mashona cows were allocated to 2 balanced groups and kept in separate paddocks at a stocking rate of 1 animal per 8 ha. One group received regular acaricide treatment to control bont (Amblyomma hebraeum) and other ticks with flumethrin pour-on preparation (Drastic Deadline) every 2 weeks. The...

Author(s)
Meltzer, M. I.; Norval, R. A. I.; Donachie, P. L.
Citation
Tropical Animal Health and Production, 1995, 27, 3, pp 129-144

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