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Resistance to nematode parasites can be improved by selection, but efforts to include appropriate traits in commercial livestock breeding programs are only a recent development. Procedures for including resistance in breeding programs are similar to those involving other traits. The steps are des...


Woolaston, R.R.Baker, R.L.[Prospects of breeding small ruminants for resistance to internal parasites]Prospects of breeding small ruminants for resistance to internal parasites

Assessment of adult female tick burden was performed on 160,151 and 150 yearling sheep in coastal Kenya at the end of three consecutive infestation periods, respectively. The main attachment sites of fully engorged female ticks were ears, head, body sides, perianal and scrotal/udder regions. Aver...


Ogore, P.B.Baker, R.L.Kenyanjui, M.Thorpe, W.R.[Assessment of natural ixodid tick infestations in sheep]Assessment of natural ixodid tick infestations in sheep

The survival rates of Dorper, Red Maasai and crossbred lambs born over a period of 6 years at Diani Estate, Coast Province, Kenya were compared using the Cox mixed proportional hazards model with a random (frailty) term for sire. Of the 1785 lambs born, proportionately 0.44 died before they were ...


Nguti, R.Janssen, P.Rowlands, G.J.Audho, James O.Baker, R.L.[Survival of Red Maasai, Dorper and crossbred lambs in the sub-humid tropics]Survival of Red Maasai, Dorper and crossbred lambs in the sub-humid tropics

The paper reviews the evidence of genetic resistance to endoparasites both within and between breeds of sheep and goats and assesses the possibilities of breeding for increased resistance. In light of this evidence, ILCA has developed a Pan-African research programme to investigate and characteri...


Baker, R.L.Lahlou-Kassi, A.Rege, J.E.O.Reynolds, L.Tekelye BekeleMukasa-Mugerwa, E.Rey, B.[A review of genetic resistance to endoparasites in small ruminants and an outline of ILCA's research programme in this area]A review of genetic resistance to endoparasites in small ruminants and an outline of ILCA's research programme in this area

A study was carried out at the International Livestock Research Institute (ILRI) Debre Berhan Research Station in Ethiopia from 1992 to 1995 to compare the peri-parturient rise (PPR) in faecal nematode egg counts (FEC) in ewes of two indigenous sheep breeds. A total of 1439 Menz and 1347 Horro ew...


Tembely, S.Lahlou-Kassi, A.Rege, J.E.O.Mukasa-Mugerwa, E.Anindo, D.O.Sovani, S.Baker, R.L.[Breed and season effects on the peri-parturient rise in nematode egg output in indigenous ewes in a cool tropical environment]Breed and season effects on the peri-parturient rise in nematode egg output in indigenous ewes in a cool tropical environment

Breeding objectives were developed for meat sheep in smallholder production circumstances in the tropics. The traits considered were litter size, lambing frequency, pre-weaning, and post-weaning lamb survival to 12 months, ewe survival, lamb live weight at 12-month, mature ewe live weight, consum...


Kosgey, I.S.Arendonk, Johan A.M. vanBaker, R.L.[Economic values for traits of meat sheep in medium to high production potential areas of the tropics]Economic values for traits of meat sheep in medium to high production potential areas of the tropics

Albizia anthelmintica Brong., belongs to the plant family Mimosaceae. The plant is widely used in East Africa by poor smallholder farmers and pastoralists to treat their livestock against internal parasites. The anthelmintic effects of water extracts from the bark of A. anthelmintica, obtained f...


Githiori, J.B.Hoglund, J.Waller, P.J.Baker, R.L.[The anthelmintic efficacy of the plant, Albizia anthelmintica, against the nematode parasites Haemonchus contortus of sheep and Heligmosomoides polygyrus of mice]The anthelmintic efficacy of the plant, Albizia anthelmintica, against the nematode parasites Haemonchus contortus of sheep and Heligmosomoides polygyrus of mice

The effects of breed and dietary protein supplementation on the development of resistance and resilience to gastrointestinal nematode parasites (endoparasites) were examined in artificially infected Horro and Menz lambs from 4 to 12 months of age. The factorial design involved two breeds, two inf...


Haile, AynalemTembely, S.Anindo, D.O.Mukasa-Mugerwa, E.Rege, J.E.O.Yami, A.Baker, R.L.[Effects of breed and dietary protein supplementation on the responses to gastro intestinal nematode infections in Ethiopian sheep]Effects of breed and dietary protein supplementation on the responses to gastro intestinal nematode infections in Ethiopian sheep

Myrsine africana L. and Rapanea melanophloeos L. belong to the plant family Myrsinaceae. Various rural communities in Kenya, such as smallholder farmers and pastoralists, use them to treat their livestock. The anthelmintic effects/activities of leaves and fruits of M. africana and fruits of R. me...


Githiori, J.B.Höglund, J.Waller, P.J.Baker, R.L.[Anthelmintic activity of preparations derived from Myrsine africana and Rapanea melanophloeos against the nematode parasite, Haemonchus contortus, of sheep]Anthelmintic activity of preparations derived from Myrsine africana and Rapanea melanophloeos against the nematode parasite, Haemonchus contortus, of sheep

Four experiments, two with sheep and two with goats, were carried out to determine the efficacy of ivermectin, fenbendazole, levamisole, closantel and some of their combinations by faecal egg count reduction tests. In the first experiment, injectable ivermectin, oral ivermectin, fenbendazole and ...


Mwamachi, D.M.Audho, James O.Thorpe, W.R.Baker, R.L.[Evidence for multiple anthelmintic resistance in sheep and goats reared under the same management in coastal Kenya]Evidence for multiple anthelmintic resistance in sheep and goats reared under the same management in coastal Kenya

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