Publications

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tick loads in cattle raised on sweet and sour rangelands in the low-input farming areas of south africa.the objective of this study was to compare tick loads and prevalence in nguni and non-descript cattle in the sweet (palatable throughout the year) and sour (palatable only in the rainy season) communal rangelands of the eastern cape province, south africa. engorged adult female ixodid ticks were collected and identified seasonally from 144 cattle raised on sweet and sour rangelands from august 2007 to april 2008. three tick species were identified in the sweet and sour rangelands namely rhipicep ...201020967568
the extent of acaricide resistance in 1-, 2- and 3-host ticks on communally grazed cattle in the eastern region of the eastern cape province, south africa.in order to determine the extent of acaricide resistance in the eastern region of the eastern cape province 1-, 2- and 3-host ticks were collected from cattle at 59 dip-tanks over a period of 2 years. these ticks were tested for resistance against 3 compounds, namely amitraz, cypermethrin and chlorfenvinphos. the shaw larval immersion test detected emerging resistance to amitraz in rhipicephalus (boophilus) microplus at 2 dip-tanks and resistance at a 3rd. it also revealed resistance in this tic ...200819244821
goats as alternative hosts of cattle ticks.the objective of this study was to compare the presence on goats and cattle of adult ticks that usually infest cattle. to this end ticks collected from sets of five goats were compared with those collected from sets of five cattle at 72 communal dip-tanks in the eastern region of the eastern cape province. amblyomma hebraeum was present on goats at 25 and on cattle at 39 dip-tanks, and a total of 61 goats and 138 cattle were infested. adult rhipicephalus (boophilus) microplus was present on goat ...200717708147
a sero-epidemiological survey of equine piroplasmosis in the northern and eastern cape provinces of south africa.serum samples from yearling thoroughbred horses (n = 176) in the magisterial districts of colesberg, venterstad, and wodehouse in the northern and eastern cape provinces were collected between september and november 1995 to determine the prevalence of antibodies to babesia equi and babesia caballi in these regions. samples were examined for specific antibodies using the indirect fluorescent antibody test. the 95% confidence intervals for the prevalence of serum antibodies in the 3 districts comb ...19969284032
parasites of domestic and wild animals in south africa. xxv. ixodid ticks on sheep in the north-eastern orange free state and in the eastern cape province.the tick burdens of 115 merino sheep, slaughtered over a period of 15 consecutive months on a farm in the north-eastern orange free state, were determined. a total of 7 ixodid and 1 argasid tick species were recovered and the seasonal abundances of boophilus decoloratus, hyalomma marginatum rufipes, margaropus winthemi and rhipicephalus evertsi evertsi were determined. one hundred and forty-nine merino sheep were slaughtered over periods varying from 10 to 25 months on 3 farms in eastern provinc ...19911923373
species composition and geographic distribution of ticks infesting cattle, goats and dogs in a temperate and in a subtropical region of south-east africa.the species and distribution of ticks infesting cattle, goats and dogs in the eastern region of the eastern cape province, south africa and maputo province, mozambique were determined from collections made from these animals at 72 localities in the former region and 30 in the latter. eleven ixodid and one argasid species were recovered in the eastern cape province and 15 ixodid species in maputo province. the most common ticks infesting cattle and goats in both provinces were amblyomma hebraeum, ...200921105593
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