Browsing School of Science, Technology and Engineering by Author "Otieno-Ayayo, Z. Ngalo"
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Efficacy of Securidaca longipedunculata Fresen (Polygalaceae) against Two Standard Isolates of Neisseria gonorrhoeae
Otieno-Ayayo, Z. Ngalo; Wekesa, Euginia Makinia; Ojunga, Michaiah (International Journal of Biochemistry Research & Review, 2020)Aim: A study was carried out to determine the in vitro antibacterial activity of ethanol extract of root and bark of Securidaca longipedunculata against two standard isolates of Neisseria gonorrhoeae NO.0296 and WHO- ... -
Enduring toxicity of transgenic Anabaena PCC 7120 expressing mosquito larvicidal genes from Bacillus thuringiensis ssp. israelensis
Otieno-Ayayo, Z. Ngalo; Manasherob, Robert; Miaskovsky, Rina; Ben-Dov, Eitan; Boussiba, Sammy; Zaritsky, Arieh (National Library of Medicine, 2003)Persistence of biological control agents against mosquito larvae was tested under simulated field conditions. Mosquito larvicidal activity of transgenic Anabaena PCC 7120 expressing cry4Aa, cry11Aa and p20 from Bacillus ... -
Factors contributing to bacterial diversity and load in Bulawayo restaurants, Zimbabwe
Otieno-Ayayo, Z. Ngalo; Siband N.; Siband M.M. (Baraton Interdisplinary Research Journal, 2012)An analysis of factors contributing to bacterial diversity and count was done on Bulawayo restaurants. Focus was on equipment, foods, personnel and working surfaces. Twenty five restaurants were selected using simple ... -
Health Care Workers Adherence to Infection Prevention Practices and Control Measures: A Case of a Level Four District Hospital in Kenya
Otieno-Ayayo, Z. Ngalo; Gichuhi, Alice W.; Kamau, Simon M.; Nyangena, Elijah (American Journal of Nursing Science, 2015)Infection prevention practices and control are critical activities that influence the quality of health care services. This study was conducted to determine the health workers adherence to infection prevention and control ... -
Integrity of 130 kDa polypeptide of Bacillus thuringiensis var israelensis delta-endotoxin in K-S defined (sporulation) medium
Otieno-Ayayo, Z. Ngalo; Chipman, David M; Zaritsky, Arieh; Khawaled, Kamal (ICIPE, 1992) -
Knowledge, attitudes and practices of trained traditional birth attendants on hiv/aids, Kenya
Otieno-Ayayo, Z. Ngalo; G.C. Seroney; Minnie, K; F.M, Mulaudzi; E Nyangena (Baraton Interdisplinary Research Journal, 2012)HIV and AIDS is a global pandemic with cases being reported from virtually every country in the world. There is a growing awareness in many African countries that the Trained Traditional Birth Attendants (TTBAs) have a ... -
Response of three mosquito species to recombinant bacterial toxins from bacillus thuringiensis subsp. Israelensis expressed in two model systems
Otieno-Ayayo, Z. Ngalo; Eitan, Ben-Dov; Rivka, Cahan; Manasherob, Robert; Zaritsky, Arieh (Baraton Interdisplinary Research Journal, 2012)Toxicity of lyophilized powders prepared prepared 16 combinations of four genes, cry4Aa, cry11Aa, cyt1Aa and p20 from Bacillus thuringiensis subsp.israelensis (Bti) expressed in Escherichia coli were examined against ... -
The silver cyprinid Rastrineobola argentea as the main diet source for rearing Anopheles arabiensis mosquitoes
Otieno-Ayayo, Z. Ngalo; J O, Yugi; Ochanda, H; WR, Mukabana (Journal of Mosquito Research, 2014)Background & objectives: All organisms that are cultured for laboratory bioassays need food for sustenance and amplification of the colony to such numbers that would not compromise the progress of the research at hand. ... -
Variations in the mosquito larvicidal activities of toxins from Bacillus thuringiensis ssp. israelensis
Otieno-Ayayo, Z. Ngalo; Zaritsky, Arieh; Wirth, Margaret C.; Manasherob, Robert; Khasdan, Vadim; Cahan, Rivka; Ben-Dov, Eitan (2008)Comparing activities of purified toxins from Bacillus thuringiensis ssp. israelensis against larvae of seven mosquito species (vectors of tropical diseases) that belong to three genera, gleaned from the literature, disclosed ...