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the prevalence and intensity of infection with eimeria species in sheep in nyandarua district of kenya.the prevalence and numbers of coccidian oocysts in faecal samples from young (less than 6 months old), immature (6-12 months old) and adult (over 12 months old) sheep on 15 farms in nyandarua district were studied during the dry and wet seasons. the species of eimeria occurring in these sheep were also identified. the proportion of animals shedding coccidian oocysts did not vary significantly with season. the prevalence of the oocysts was significantly higher (p < 0.05) in young sheep (mean 85.3 ...19948091637
resistance to benzimidazoles and levamisole in nematode parasites of sheep in nyandarua district of kenya.the occurrence of anthelmintic resistance on 25 sheep farms in the nyandarua district of kenya was investigated, using the faecal egg count reduction test (fecrt), the egg hatch assay (eha) and a larval development assay (lda). in the fecrt, resistance to both benzimidazoles (bzs) and levamisole (lev) was detected on four farms, resistance to lev only on three farms and to bzs, only on two farms. haemonchus contortus was the predominant nematode species in both pre-treatment and post-treatment f ...19989588239
strategic control of gastrointestinal nematodes of sheep in the highlands of central kenya.the effectiveness of anthelmintic treatments given 3 weeks after the onset of rains to control gastrointestinal nematodes in sheep in the highlands of central kenya was investigated. the study was carried out on a farm situated approximately 85 km north west of nairobi in nyandarua district of central kenya. in may 1999, 35 corriedale ram lambs aged between 8 and 10 months were eartagged, weighed and given albendazole at 3.8 mg/kg body mass. the animals were then allocated to three treatment gro ...200212356170
rift valley fever outbreak in livestock in kenya, 2006-2007.we analyzed the extent of livestock involvement in the latest rift valley fever (rvf) outbreak in kenya that started in december 2006 and continued until june 2007. when compared with previous rvf outbreaks in the country, the 2006-07 outbreak was the most extensive in cattle, sheep, goats, and camels affecting thousands of animals in 29 of 69 administrative districts across six of the eight provinces. this contrasted with the distribution of approximately 700 human rvf cases in the country, whe ...201020682907
the strategic use of closantel and albendazole in controlling naturally acquired gastrointestinal nematodes of sheep in the kenya highlands.the strategic use of closantel, a narrow-spectrum salicylanilide anthelmintic against bloodsucking helminths, and of albendazole, a broad-spectrum benzimidazole anthelmintic, in the control of gastrointestinal nematodes of sheep was investigated on a farm in nyandarua district in the highlands of kenya. thirty corriedale female lambs aged between 9 and 12 months were assigned to three treatment groups of 10 lambs each. the three groups were set stocked on separate paddocks for 12 months. lambs i ...19979444078
the effects of a controlled-release albendazole capsule (proftril-captec) on parasitism in grazing corriedale ewes in the nyandarua district of kenya.the effects of intraruminal sustained-release capsules (irsrcs) on parasitism in grazing corriedale ewes were investigated over a period of 119 days (4 june-30 september 1993) using 40 ewes aged approximately 2 years and randomly divided into two groups of 20 ewes each. each of the ewes in the treatment group received an irsrc while the controls were left untreated. the groups were placed on adjacent 2.5-acre paddocks obtained by subdividing a 5.0-acre permanent pasture which had previously been ...19979061882
observations on rinderpest in kenya, 1986-1989.rinderpest was confirmed in kenya in 1986, 1987, 1988 and 1989. three epidemiologically distinct events appear to have occurred: repeated outbreaks in west pokot district related to cross-border movement of stock, an outbreak in marsabit district in 1987 (thought to have been caused by illegal movement of cattle, possibly in vehicles, from countries further north) and a series of related outbreaks in and near nairobi between 1988 and 1989 due to the unauthorized movement from abattoirs and holdi ...19921472724
worm control practices on sheep farms in nyandarua district of kenya.a questionnaire investigation was used to examine anthelmintic usage and practical worm control for sheep on 50 farms selected randomly in nyandarua district of central kenya. control of helminths was based primarily on the use of anthelmintics on all 50 farms. on the majority (54%) of these properties, lambs were drenched two times per year. ewes and rams were drenched three or four times per year on 74% of the farms. most treatments were given at intervals of approximately 3 months with no spe ...19979351998
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