Browsing Faculty of Science & Technology (FST) by Author "Kaaya Godwin P."
Now showing items 21-40 of 63
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Effects of combining the fungi Beauveria bassiana and Metarhiziumanisopliae on the mortality of the tick Amblyomma variegatum (ixodidae) in relation to seasonal changes
Maranga RO.; Kaaya Godwin P.; Mueke JM.; Hassanali A. (University of Nairobi.School of Biological Sciences, 2005-06)The effect of formulation, fungal concentration, type and seasonal changes on the mortality of the tick Amblyomma variegatum was investigated. A previous study demonstrated high pathogenicity of strains of the fungi Beauveria ... -
The effects of Trypanosoma congolense infection on the testis and epididymis of the goat
Kaaya Godwin P.; Oduor-Okelo D. (Uniiversity of Nairobi.School of Biological Sciences, 1980-03)Five male non-castrated goats were each injected with 2 ml of blood from an infected goat containing about 0.75 million T. congolense/ml. Two goats died 4 weeks after infection; the remainder and five controls were killed ... -
Experimental and natural infections of the tick Rhipicephalus appendiculatus with entomopathogenic fungi Beauveria bassiana and Metarhizium anisopliae, and natural infection of some ticks with bacteria and fungi
Mwangi EN.; Kaaya Godwin P.; Essuman S.; Kimondo MG.; Ouana E. (1994) -
Experimental infections of the tick Rhipicephalus appendiculatus with entomopathogenic fungi, Beauveria bassiana and Metarhizium anisopliae, and natural infections of some ticks with bacteria and fungi
Mwangi EN.; Kaaya Godwin P.; Essuman S. (University of Nairobi.school of biological sciences, 1995-09)Two strains of the entomogenous fungus, Beauveria bassiana, were found to be pathogenic to all stages of the tick Rhipicephalus appendiculatus in the laboratory. A mortality of up to 73 percent of unfed adults was recorded, ... -
Factors influencing vector/parasite transmission of Theileriosis in Africa
Sebitosi E.; Kaaya Godwin P.; Agbede RIS. (University of Nairobi.school of Biological Sciences, 1998) -
Fecundity and survival of tsetse maintained on immunized rabbits Kaaya Godwin P.; Alemu Patrick
Kaaya Godwin P.; lemu P. (1982)Female Glossina morsitans morsitans maintained on rabbits previously immunized with whole tsetse body (WTB), engorged tsetse guts (ETG) or gravid tsetse uteri (GTU) for three successive generations showed no increase in ... -
Further observations on survival and fertility of Glossina morsitans morsitans maintained on immunized rabbits
Kaaya Godwin P.; Alemu Patrick. (University of Nairobi.School of Biological Sciences, 1984)A significant increase in mortality was observed in Glossina morsitans morsitans maintained for approx. 45 days on rabbits immunized with tsetse or bovinetrypsin. Tsetse and bovine trypsin were observed to cross-react when ... -
Glossina morsitans morsitans: mortalities caused in adults by experimental infection with entomopathogenic fungi
Kaaya Godwin P. (University of Nairobi.School of Biological Sciences, 1989-03)Various strains of the entomopathogenic fungi: Beauveria bassiana, Metarhizium anisopliae, Paecilomyces fumosoroseus and P. farinosus were found to be pathogenic for adult tsetse, Glossina morsitans morsitans but B. bassiana ... -
The humoral defense system in tsetse: differences in response due to age, sex and antigen types.
Kaaya Godwin P.; Darji N. (University of Nairobi.School of Biological Sciences, 1988)Inoculation of live Escherichia coli into tsetse flies, Glossina morsitans morsitans, stimulated a higher antibacterial immune response in females than in males. It increased with age in females from emergence to approximately ... -
A Hymenopteran Parasitoid Of The Bont Tick Amblyomma-variegatum Fabricius (acarina, Ixodidae) In Kenya
Mwangi Esther N.; Newson RM.; Kaaya Godwin P. (1993) -
The impact of Ixodiphagus hookeri, a tick parasitoid, on Ambl yomma variegatum (Acari: Ixodidae) in a field trial in Kenya
Esther NM.; Kaaya Godwin P.; Suliman E.; Shawgi MH. (Uniiversity of Nairobi.School of Biological Sciences, 1997-02-01)In an experiment to investigate the effect of the tick parasitoid, Ixodiphagus hookeri, on tick numbers on cattle, 150 000 parasitoids were released over a period of 1 year in a field where ten cattle infested with multiple ... -
Incorporation of seaweed in mushroom cultivation substrates and mushroom iodization
Kaaya Godwin P.; Kadhila-muandingi PN.; Lotfy HR.; Mshigeni K. (University of Nairobi.school of Biological Sciences, 2012) -
Infections and mortalities induced by Metarhizium anisopliae in various developmental stages of the red-legged tick Rhipicephalus evertsi evertsi using 2 formulations
Hedimbi M.; Kaaya Godwin P.; Chimwamurombe M. (University of Nairobi.school of Biological Sciences, 2009) -
Inhibition of bovine bone marrow granulocyte/macrophage colony formation in vitro by serum collected from cattle infected with Trypanosoma vivax or Trypanosoma congolense
Kaaya Godwin P.; Valli VE.; Maxie MG.; Losos GJ. (University of Nairobi.School of Biological Sciences, 1979-06)Serum collected from cattle infected with Trypanosoma vivax or Trypanosoma congolense inhibited bovine granulocyte/macrophage colony formation in methyl cellulose cultures. Maximum inhibition was caused by serum collected ... -
Inhibition of leukopoiesis by sera from Trypanosoma congolense infected calves: partial characterization of the inhibitory factor
Kaaya Godwin P.; Tizard IR.; Maxie MG.; Valli VE. (University of Nairobi.School of Biological Sciences, 1980-06)Sera collected from calves infected with Trypanosoma congolense inhibited bovine granulocyte/macrophage colony formation in vitro, but not erythroid colony formation. The inhibitor was found to be TCA precipitable in nature ... -
Insect immunity: Induction of cecropin and attacin-like antibacterial factors in the haemolymph of Glossina morsitans morsitans
Kaaya Godwin P.; Casper Flyg.; Hans G Boman. (University of Nairobi.School of Biological Sciences, 1987)Injections of live Escherichia coli into adult tsetse flies, Glossina morsitans morsitans induced an antibacterial activity in the haemolymph after a lag period of 6–18 hr. Peak activity occurred after 24–72 hr with a dose ... -
The kinetics of haemopoietic differentiation assessed by in vitro bone marrow culture in endotoxin-treated and in anaemic calves
Kaaya Godwin P.; Maxie MG. (University of Nairobi.School of Biological Sciences, 1980-07)Marrow aspirates from calves injected with Pseudomonas aeruginosa endotoxin showed an increased number of granulocyte/macrophage progenitor cells, and a reduced number of erythroid progenitor cells. On the other hand, ... -
Laboratory and Field Evaluation of Entomogenous Fungi for Tick Control
Kaaya Godwin P. (University of Nairobi.school of biological sciences, 2000-12)Aqueous and oil-based formulations of two entomogenous fungi, Beauveria bassiana and Metarhizium anisopliæ were tested for their efficacy against the three major species of African ticks; namely, Amblyomma variegatum, ... -
Laboratory Evaluation of Pathogenicity of Entomogenous Nematodes to African Tick Species
Kaaya Godwin P.; Michael S.; Itamar G. (University of Nairobi.School of Biological Sciences, 2000)Five strains of entomogenous nematodes, Steinernema carpocapsæ strains DD, Mexican, SR, and Heterorhabditis bacteriophora strains 1S5 and HP88, were tested for their pathogenicity to various developmental stages of five ... -
Mortalities induced by entomopathogenic fungus Metarhizium anisopliae to different ticks of economic importance using two formulations
Hedimbi M.; Kaaya Godwin P.; Chinsembu KC. (2011)The objective of this study was to compare the infe ctivity of Metarhizium anisopliae at a concentration of 1 × 10 8 conidia/ml to developmental stages of Amblyomma variegatum, Rhipicephalus appendiculatus and ...