Browsing Faculty of Science & Technology (FST) by Author "Kaaya Godwin P."
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Acaricidal activity of Margaritaria discoidea (Euphorbiaceae) plant extracts against the ticks Rhipicephalus appendiculatus and Amblyomma variegatum (Ixodidae)
Kaaya Godwin P.; Esther Mwangi N.; Mutua Malonza M. (Uniiversity of Nairobi.School of Biological Sciences, 1995)A water soluble extract of M. discoidea, an African indigenous plant induced high mortalities in nymphs of both Rhipicephalus appendiculatus, and Amblyomma variegatum and in adult R. appendiculatus, but not in adult A. ... -
Acquisition of resistance to the tick Amblyomma variegatum in Boran cattle, Bos indicus and the effects of Trypanosoma congolense and Babesia bigemina on host resistance
Dossa SC.; Kaaya Godwin P.; Essuman S.; Odulaja A.; Assoku RG. (University of Nairobi.School of Biological Sciences, 1996-04)Resistance was induced in cattle to the tick Amblyomma variegatum by five consecutive infestations with nymphs and adults. Using the principal component analysis (PCA), it was found that percentage of adults engorged, ... -
Attraction of Amblyomma variegatum (ticks) to the attraction-aggregation-attachment-pheromone with or without carbon dioxide
Maranga RO.; Hassanali A.; Kaaya Godwin P.; Mueke JM. (University of Nairobi.School of Biological Sciences, 2003)The responses of adult Amblyomma variegatum ticks released from various distances to different doses of the synthetic attraction-aggregation-attachment pheromone (AAAP) (made up of orthonitrophenol, methyl salicylate and ... -
Biocontrol potential of the entomogenous fungi Beauveria bassiana and Metarhizium anisopliae for tsetse flies (Glossina spp.) at developmental sites
Kaaya Godwin P.; Munyinyi DM. (University of Nairobi.School of Biological Sciences, 1995-11)Spores of two entomogenous fungi, Beauveria bassiana and Metarhizium anisopliae, were mixed with sterile sand at two different concentrations (1.0 and 0.5 g/liter) and larvae of tsetse flies Glossina morsitans morsitans ... -
Bovine erythrocytic, granulocytic and macrophage colony formation in culture. A preliminary report
Kaaya Godwin P.; Valli VE.; Maxie M G. (University of NaitrobiSchool of Biological Sciences, 1978-07)Bovine erythrocytic colonies containing up to 300 cells each were produced by using a plasma clot technique with five percent CO2 at 37 degrees C. with high humidity and 2.5 units of sheep step III erythropoietin per ... -
Bovine granulocyte/macrophage and erythroid colony culture: characteristics of the colonies and the assay systems
Kaaya Godwin P.; Maxie MG.; Valli VE.; Losos GJ. (University of Nairobi.School of Biological Sciences, 1979-10)Bovine bone marrow granulocyte/macrophage colonies were cultured in vitro in methyl cellulose and in plasma clots using bovine endotoxin-stimulated serum as a source of colony stimulating activity. The endotoxin-stimulated ... -
Characteristics of erythroid colonies formed by bovine marrow progenitor cells in methyl cellulose cultures
Kaaya Godwin P.; Jamal N.; Maxie MG.; Messner HA. (University of Nairobi.School of Biological Sciences, 1982-03)Bovine erythroid colonies containing eight to 100 erythroid cells were successfully cultured in methyl cellulose. The colonies required four to five days to mature and a direct linear relationship (r = 0.99) between the ... -
Clinico-pathological Aspects Of Trypanosoma Congolense Infection In Goats
Kaaya Godwin P. (University of NairobiCollege of Humanities and Social Sciences, 1977)Abstract Not Available -
Comparative study of hemocytes and associated cells of some medically important dipterans
Norman Ratcliffe A.; Kaaya Godwin P. (University of Nairobi., 1982-09)The aim of this work is to study, characterize, and compare different morphological types of hemocytes of Glossina austeni, G. morsitans, Calliphora erythrocephala, Stomoxys calcitrans, Lucilia sericata, Aedes aegypti, and ... -
Comparative trypanotolerance of the small east African breed of goats from different localities to Trypanosoma congolense infection
Mutayoba BM.; Gombe S.; Waindi EN.; Kaaya Godwin P. (University of Nairobi.School of Biological Sciences, 1989-05)Differences in susceptibility of the Small East African breed of goats to an experimental Trypanosoma congolense infection were investigated. The goats were obtained from different areas of East Africa, Morogoro and Arusha ... -
Comparison of resistance in three breeds of cattle against African ixodid ticks.
Solomon G.; Kaaya Godwin P. (University of Nairobi.School of Biological Sciences, 1996-04)Tick resistance in three breeds of cattle, two indigenous breeds (Arssi and Boran) and one Boran x Friesian cross-bread, were compared following natural tick infestations at Abernossa ranch in Ethiopia. The local Arssi ... -
Control of tick populations by spraying Metarhizium anisopliae conidia on cattle under field conditions
Kaaya Godwin P.; Samish M.; Hedimbi M.; Gindin G.; Glazer I. (University of Nairobi.School of Biological Sciences, 2011-11)Conidia of the entomopathogenic fungus, Metarhizium anisopliae, in oil/water formulation (1 × 10(8) conidia/ml) were sprayed at 3 weekly intervals on Rhipicephalus evertsi evertsi and Rhipicephalus (Boophilus) decoloratus ... -
Cryopreservation of bovine hemopoietic progenitor cells in liquid nitrogen
Kaaya Godwin P.; Maxie MG.; Valli VE. (University of Nairobi.School of Biological Sciences, 1981-04)Bovine marrow granulocyte/macrophage and erythroid progenitor cells maintained viability after storage in liquid nitrogen for 2 to 4 weeks. The granulocyte/macrophage progenitor cells maintained 100% viability for 4 weeks, ... -
Cuticular lesions: a non-infectious integumental disease of Glossina species
Odindo MO.; Turner DA.; Otieno WA.; Kaaya Godwin P. (University of Nairobi.School of Biological Sciences, 1981-12)Purified suspensions of macerated cuticular lesions from the insectary-reared tsetse Glossina morsitans morsitans were applied on laboratory-reared newly emerged teneral tsetse by three pathways: topical application on the ... -
Depression of ovarian function and plasma progesterone and estradiol-17 beta in female goats chronically infected with Trypanosoma congolense
Mutayoba BM.; Gombe S.; Waindi EN.; Kaaya Godwin P. (University of Nairobi.School of Biological Sciences, 1988-04)Adult normocyclic female goats experimentally infected with Trypanosoma congolense developed irregular and shorter estrous cycles before complete cessation at the fourth cycle post-infection. This was followed within a ... -
Determination of optimum seaweed concentration for mushroom cultivation and the ability of mushrooms to absorb iodine
Kaaya Godwin P.; Kadhila-Muandingi PN.; Lotfy HR.; Mshigeni KE. (©2012 Academic JournalsSchool of biological sciences, 2012-07)The optimum concentration of seaweed (Laminaria schinzii) in grass as substrate for cultivation of the Oyster mushroom Pleurotus sajor caju was observed to be 10%. This concentration supported growth of highest numbers and ... -
Development, reproductive capacity and survival of Amblyomma variegatum and Boophilus decoloratus in relation to host resistance and climatic factors under field conditions
Solomon G.; Kaaya Godwin P. (University of Nairobi.School of Biological Sciences, 1998-02)To determine the developmental periods, fecundity and survival of Amblyomma variegatum and Boophilus decoloratus and the effect of host resistance, a study was carried out in the field at Abernossa ranch in Ethiopia using ... -
Drop-off patterns for engorged adult females, nymphs and larvae of Rhipicephalus appendiculatus
Mwangi Esther N.; Newson Robin M; Kaaya Godwin P. (University of Nairobi.School of Biological Sciences, 1991-12)A drop off rhythm of engorged Rhipicephalus appendiculatus Neumann was demonstrated for females and engorged nymphs, but not for larvae. Seventy per cent of 1279 engorged R. appendiculatus females dropped off the animals ... -
Effect of chronic experimental Trypanosoma congolense infection on the ovaries, pituitary, thyroid and adrenal glands in female goats.
Mutayoba BM.; Gombe S.; Kaaya Godwin P.; Waindi EN. (Uniiversity of Nairobi.School of Biological Sciences, 1988-03)Changes in the ovaries, pituitary, thyroid and adrenal glands in Small East African normally cycling female goats chronically infected with T. congolense are described. Marked fibrosis of the ovaries, a decrease in the ... -
Effects of bacteria, antibacterial compounds and trypanosomes on tsetse reproduction and longevity
Kaaya Godwin P.; Darjia N.; Otieno LH. (University of Nairobi.School of Biological Sciences, 1987-04)Haemocoelic injections of live Escherichia coli and oral administration of three tetracycline compounds, namely Reverin, Maxitet and Terramycin to female Glossina morsilans morsitans prior to their first larviposition, ...