Title/Qualifications: Ph.D
Biochemistry, Microbiology and Biotechnology
Permanent Address:
P.O Box 5191-00200, Nairobi, Kenya.
Contact Address:
P.O Box 43844, Nairobi, Kenya
Email: This email address is being protected from spambots. You need JavaScript enabled to view it.
Position: Lecturer
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ORCID ID: https://orcid.org/0000-0002-9314-5115

Area of Specialization: Environmental Microbiology

Research Interests: Biological Nitrogen Fixation; Plant-Microbe Interactions, Biopesticides and Biofertilizers


  • Tweya O.M., Maingi J.M., Nyamache A.K. and Nyachieo A. (2022): Safety and Efficacy Assessment of Bacteriophages Isolated from Kibera, Kenya Wastewater Plant, against Multidrug-Resistant Pseudomonas aeruginosa Infection in BALB/c Mice. American Journal of Infectious Diseases and Microbiology, 10(1) 11-21: http://pubs.sciepub.com/ajidm/10/1/3
  • Gitonga, N.M., Njeru E.M, Cheruiyot R. and Maingi J.M (2021): Bradyrhizobium inoculation has a greater effect on soybean growth, production and yield quality in organic than conventional farming systems, Cogent Food and Agriculture, 7:1, 1935529, DOI: 10.1080/23311932.2021.1935529: https://doi.org/10.1080/23311932.2021.1935529
  • Gitonga NM, Njeru EM, Cheruiyot R and Maingi J.M. (2021) Genetic and Morphological Diversity of Indigenous Bradyrhizobium Nodulating Soybean in Organic and Conventional Family Farming Systems. Front. Sustain. Food Syst.4:606618. doi: 10.3389/fsufs.2020.606618 Jalloh, A.A. Njeru, E. M., Maingi J.M. (2020) Potential of native rhizobia isolates to improve production of legume crops in small holder farms. Bioscience Research, 17(2): 1498-1510.
  • Victoria Naluyange V., Ochieno D.M.W., Wandahwa P., Maingi J.M., Ombori O, Dative Mukaminega D., Amoding A., Odendo M., and Muoma J.V.O. (2020). Performance of Mwitemania Bean Under the Influence of Nitrogen-Fixing Rhizobium Inoculant, Water Hyacinth Composts and DAP Fertilizer in a Field Infested with Aphis fabae and Colletotrichum lindemuthianum. Book Chapter In: Sutton M.A. et al. (eds), Just Enough Nitrogen. Springer Nature Switzerland AG 2020. 125-138, https://doi.org/10.1007/978-3- 030-58065-0_9
  • Mburu, S.W., Koskey, G., Njeru, E.M., Ombori O.., Maingi J.M., Kimiti, J. (2020). Differential Response of Promiscuous Soybean to Local Diversity of Indigenous and Commercial Bradyrhizobium Inoculation Under Contrasting Agroclimatic Zones. International Journal of Plant Nutrition. https://doi.org/10.1007/s42106-020-00117-1
  • Chepkemboi A., Maingi J.M. and Nchore S.B. (2020): Screening of common bean genotypes for resistance against Xanthomonas campestris pv. phaseoli in Kakamega County, Kenya. European Journal of Biology 5(1),16-27.
  • Musyoka D.M., Njeru E.M., Nyamwange M.M., and Maingi J.M. (2020). Arbuscular mycorrhizal fungi and Bradyrhizobium co-inoculation enhances nitrogen fixation and growth of green grams (Vigna radiata L.) under water stress. Journal of Plant Nutrition, 43(7): 1036-1047. https://doi.org/10.1080/01904167.2020.171194
  • Akwa T.E., Ning T.R. and Maingi J.M. (2020). Assessing the perceptions and awareness of COVID-19 (Coronavirus) in Cameroon. European Journal of Medical and Educational Technologies, 13(2), Article No: em2007. https://doi.org/10.30935/ejmets/8236
  • Njeru E. M., Muthini M., Muindi M.M., Ombori O., Nchore S.B., Runo S., and Maingi J. (2020). Exploiting Arbuscular Mycorrhizal Fungi Rhizobia-Legume Symbiosis to Increase Smallholder Farmers’ Crop Production and Resilience Under a Changing Climate In: Singh et al. Climate Impacts on Agricultural and Natural Resource Sustainability in Africa. Springer Nature Switzerland AG 2020, 471-488. ISBN 978-3-030-37536-2 ISBN 978-3-030-37537-9 (eBook) https://doi.org/10.1007/978-3-030-37537-9
  • Wasonga M. O., Maingi J. and Ombori O. (2020). Occurrence of Enteric Viruses in 3 Surface Water and the Relationship with Changes in Season and Physical Water Quality Dynamics. Advances in Virology, 2020, 1-11. https://doi.org/10.1155/2020/9062041
  • Wasonga M.O., Maingi J.M. and Ombori O. (2020): Molecular Detection of Human Enteric Adenoviruses in Water Samples Collected from Lake Victoria Waters Along Homa Bay Town, Homa Bay County, Kenya. Food and Environmental Virology. https://doi.org/10.1007/s12560-020-09444-y
  • Akwa T.E., Maingi J.M. and Birgen J.K. (2020): Assessing the incidence of common bean (Phaseolus vulgaris L.) infection by fungi during harvest and storage in Cameroon. Studies in Fungi 5(1): 435–446. Doi 10.5943/sif/5/1/24
  • Akwa T.E., Maingi J.M. and Birgen J.K. (2020): Susceptibility of CommonBean (Phaseolus Vulgaris L) Cultivars Grown in Menoua Division, West Region of Cameroon to Storage Fungi Pathogens. Journal of Horticultural Science and Research 3(1): 94-103. DOI: 10.36959/745/404
  • Towett G., Maingi J. Ombori O. and Mbuvi H. (2020): Reduction of Mobile Heavy Metals During Composting of Water Hyacinth Weed. International Journal of Biological, Physical and Chemical Studies 2(1): 1-7.
  • Wasonga M.O, Maingi J. and Ombori O. (2021): Effects of Contamination of Freshwater Habitat With Common Heavy Metals and Anions on the Prevalence of Human Adenoviruses and Enteroviruses. Frontiers in Public Health. doi: 10.3389/fpubh.2020.603217.
  • Gershom, N. A., Stella, K., John, M., & Anthony, K. (2020). Variation of Total Coliforms and Bacteria during Dry and Wet Seasons in Rivers of Sigor Division, West Pokot County, Kenya. Journal of Advances in Microbiology 20(11), 41-51. https://doi.org/10.9734/jamb/2020/v20i1130299 Langata
  • M.L., Maingi J.M., Musonye H.A., Kiiru J., Nyamache A.K. (2019). Antimicrobial resistance genes in Salmonella and Escherichia coli isolates from chicken droppings in Nairobi, Kenya. BMC Research Notes, https://doi.org/10.1186/s13104-019- 4068-8. Beesigamukama D., Tumuhairwe J.B,
  • Muoma J., Maingi J.M., Ombori O., Mukaminega D., Nakanwagi J. and Amoding A. (2018). Improving Water Hyacinth-Based Compost for Crop Production. Journal of Agricultural Science and Food Technology 4 (3), 52-63.
  • Beesigamukama D., Tumuhairwe J.B., Muoma J., Maingi J.M., Ombori O., Mukaminega D., Nakanwagi J. and Amoding A. (2018). Agronomic effectiveness of water hyacinthbased composts. African Journal of Agricultural Research 13(39), 2055-2062.
  • Gitari J. M., Maingi J.M. and Onyango B.O. (2018). Biological and chemical Approach In The Management Crown Gall Disease Of Roses Under Greenhouse Conditions. IOSR Journal of Pharmacy and Biological Sciences 13 (6) I, 25-33. 4
  • Koskey G., Mburu, SW, Kimiti, J.M., Ombori, O., Maingi, J.M. and Njeru, E.M. (2018) Genetic Characterization and Diversity of Rhizobium Isolated from Root Nodules of MidAltitude Climbing Bean (Phaseolus vulgaris L.) Varieties. Frontiers in Microbiology, 9:968. doi: 10.3389/fmicb.2018.00968
  • Kawaka, F, Dida, M., Opala, P., Ombori, O., Maingi, J., Amoding, A. and Muoma, J. (2018). Effect of nitrogen sources on the yield of common bean (Phaseolus vulgaris) in Western Kenya. Journal of Plant Nutrition, https://doi.org/10.1080/01904167.2018.1458870.Page 7 of 13

  • Koskey G., Mburu S.W., Njeru E.M., Kimiti J.M., Ombori M., Maingi J.M., (2017). Potential of Native Rhizobia in Enhancing Nitrogen Fixation and Yields of Climbing Beans (Phaseolus vulgaris L.) in Contrasting Environments of Eastern Kenya. Frontiers in Plant Science 8, 1-12.

  • Kago E.K, Kinyua Z.M., Maingi J.M. and Okemo P.O. (2017): Diversity of Ralstonia solanacerum Strains in Solanaceous Crops Production Regions of Central Kenya. Journal of Experimental Agriculture International 16(1): 1-12.

  • Wekesa C., Muoma J., Ombori O., Maingi J., Okun D., Juma K., Okoth P., Wamalwa E., Kollenberg M. and Mauti E. (2017): Genetic Characterization of Rhizosphere Bacteria that Inhabit Common Bean Nodules in Western Kenya Soils. Applied Microbiology: Open Access, 3: 128. doi:10.4172/2471-9315.1000128.

  • Nyamwaka I.S., Nyamache A.K. and Maingi J.M. (2017): Microfungi Associated with Sun Dried Rastrineobola argentea Sold in Gucha South District in Kenya. Microbiology Research Journal International 19(3): 1-8.

  • Mburu S.W., Koskey G, Kimiti J.M., Ombori M., Maingi J.M. and Njeru E.M. (2016), Agrobiodiversity conservation enhances food security in subsistence-based farming systems of Eastern Kenya; Agriculture and Food Security Journal 5 (19): 1-10.

  • E.W. Ouma, AM Asango, J Maingi, EM Njeru (2016): Elucidating the Potential of Native Rhizobial Isolates to Improve Biological Nitrogen Fixation and Growth of Common Bean and Soybean in Smallholder Farming Systems of Kenya. International Journal of Agronomy.

  • Naluyange V., Ochieno D.M.W, Wandahwa P., Odendo M., Maingi J.M., Amoding A., Ombori O., Mukaminega D. and Muoma J (2016): Belowground Influence of Rhizobium Inoculant and Water Hyacinth Composts on Yellow Bean Infested by Aphis fabae and Colletotrichum lindemuthianum under Field Conditions. Journal of Plant Studies 5 (2), 32-46.

  • Kamau E.W., Kariuki G. M and Maingi J. (2016): Effect of Trichoderma asperellum on growth of Rhizobium leguminosarum in vitro. Global Journal of Biology, Agriculture and Health Sciences, 5(1):43-48.

  • Moto J. N., Maingi J.M. and Nyamache A. K. (2015). Prevalence of Tinea capitis in school going children from Mathare, informal settlement in Nairobi, Kenya. BMC Research Notes 8: 274-279

  • P.N. Waithaka, J.M. Maingi, A.K. Nyamache (2014): Isolation of microorganisms and screening of heavy metals from Municipal Council’s treated sewage from Nakuru sewage treatment plant in Nakuru County, Kenya. Scientific Journal of Microbiology 3(12), 118-125.
  • Paul Njenga Waithaka, J. Maingi, A. K Nyamache (2014): Microbial contamination ofenvironmental, food and treated water samples in Nakuru North Sub-county, Kenya International Journal of Microbiology and Allied Sciences, 1(2):78-9
  • Paul Njenga Waithaka, John Muthini Maingi, A. K. Nyamache (2014): Physico-chemical and Salmonella isolates in community taps and river Kandutura in Nakuru North Sub-county, Kenya. International Journal of Microbiology and Epidemiological Research, 2(4), 29-37,
  • Kago E.K, Kinyua Z.M., Okemo P.O. and Maingi J.M. (2014): Effects of Cabbage Tissue and Calcium Hypochlorite on Soil Fertility and Yields of Selected Solanaceous Crops. Annual Research and Review in Biology, 4(3) 547-559.
  • Njeru, E.M., Maingi, J.M., Gitonga, N.M. and Cheruiyot, R. Symbiotic N2 Fixation in Promiscuous Soybeans (Glycine max L. Merr.) as Influenced by Phosphorus, Potassium and Sulphur Nutrition. Conference proceedings on 1st East African Regional Scientific Conference of Pure and Applied Sciences 10th-14th August, 2010 Kenyatta University, Nairobi Kenya.

Articles in Conference Proceedings

  • Muthini, M., Maingi J.M., Muoma, J.O., Amoding, A.M., Mukaminega, D., Newton Osoro, N. and Ombori, O. (2013). Morphological assessment and effectiveness of 8 indigenous rhizobia isolates that nodulate P. vulgaris in water hyacinth compost testing field in Lake Victoria basin. Proceedings of the Natural Resource Management and Ethnobotany and Health Cluster Workshop held from 7th – 12th April 2013, at Mukono, Uganda. 2. Osoro, N.,
  • Ombori, O., Muoma, J.O., Amoding, A.M., Mukaminega, D., Muthini, M. and Maingi, J.M. (2013). Effects of water hyacinth (Eichhornia crassipes [mart.] solms) compost on growth and yield of common beans (Phaseolus vulgaris) in Lake Victoria Basin. Proceedings of the Natural Resource Management and Ethnobotany and Health Cluster Workshop held from 7th – 12th April 2013, at Mukono, Uganda.
  • Muoma, J.O., Ombori, O., Amoding, A.M., Mukaminega, D., Muthini, M., Maingi, J.M. and Osoro, N. (2013). Production of organic fertilizer from water hyacinth (Eichhornia crassipes [Mart.] Solms) for sustainable organic farming and conservation of ecosystem in Lake Victoria basin. Proceedings of the Natural Resource Management and Ethnobotany and Health Cluster Workshop held from 7th – 12th April 2013, at Mukono, Uganda.
  • Muoma, J.V.O., Maingi, J., Ombori, O., Amoding, A. and Mukaminega, D. (2012). Production of organic fertilizer from water hyacinth (Eichhornia crassipes [Mart.] Solms) for organic farming and conservation of ecosystem in Lake Victoria basin. Proceeding of the Workshop for the VicRes projects held in Kigali-Rwanda between 14th–16th June 2012.
  • Kago E.K, Kinyua Z.M., Okemo P.O. and Maingi J.M.: Effects of Brassica tissue, ChalimTM and Metham sodium on soil chemical properties and yields of selected solanaceous crops. PACN Congress on Agricultural Productivity, Water and Waste. United Nations Conference Centre, Addis Ababa, Ethiopia, 26th November – 27th November 2012.
  • Kago E.K., Kinyua Z.M., Okemo P.O. and Maingi J.M.: Management of bacterial wilt (Ralstonia salnacearum) of selected solanaceous crop species using organic and inorganic pesticides. 13th Biennial KARI Scientific Conference. KARI Headquarters, Kaptagat Road, Loresho, Nairobi, 22nd October - 26th October 2012