PROFESSOR SILAS KIRUKI

WORKING EXPERIENCE
Dec, 2021– Present: Associate Professor, in the Department of Physical Sciences, Chuka University.
Jan, 2015– Dec. 2021: Senior Lecturer, in the Department of Physical Sciences, Chuka University.
April 2013–Dec. 2014: Senior Lecturer, Department of Biochemistry and Molecular Biology, Egerton University.
August 2006–April 2013: Lecturer, Department of Biochemistry and Molecular Biology, Egerton University.
May 2002– Aug. 2006: Assistant Lecturer, Department of Biochemistry and Molecular Biology, Egerton University.
Sep. 2001– May 2002: Assistant Lecturer, Department of Applied Biology, Kenya Methodist University.
January 2000–Sep. 2001: Secondary School Teacher, ST. James Tutua Secondary School.

RESEARCH WORK ARTICLES/PUBLICATIONS IN REFEREED JOURNALS
1. Shikuku, B.O, Kiruki, S, Kuria, E,Mayo, D. and Ogola, F.O. (2023). Effect of pH, Carbon and Nitrogen Sources on Antibiotic
Production by Actinomycetes Isolates from River Tana and Lake Elementaita, Kenya. Asian Journal of Research in Biochemistry.
13(1) 42-51.
1. Shikuku, B.O, Kiruki, S, Kuria, E, Mutembei, M. and Ogola, F.O. (2023). Characterization of Antibiotic-producing Actinomycetes
Isolated from River Tana and Lake Elementaita in Kenya. Asian Journal of Research in Biochemistry. 13(1) 26-41.
Gitonga GM, Ngeranwa J, Machocho AK & Kiruki S. (2020). Phytochemical and Anti-inflammatory analysis of Prunus africana
Bark Extract. Research Journal of Pharmacognosy, 7(4): 31-38.
3. Gitonga GM, Ngeranwa J, Machocho AK & Kiruki S. (2020). Qualitative Phytochemical screening and Antipyretic activity of
methanolic stem bark extract of Mangifera indica in wistar rats. Journal of Phytopharmacology, 9(4):218-223.
Kainyu, R.M., Kiruki, S., Njagi, E.N.M. and George, O. (2019). Pediatric Reference Values for some Renal Biochemistry Tests in
Meru County, Kenya. Journal of Biochemistry & Molecular Medicine. 1(1): 25-30.
4. Kiruki, S. (2019). Virulence Gene Markers and Multiple Drug Resistance in Escherichia coli Isolated from River Njoro in Kenya.
Journal of Environment sustainability Advancement Research.6: 112.
5. Annastacia, M. M., Gitonga, L., Kiruki, S. (2019). Foot-care influence on foot ulcer development among type 2 diabetes mellitus
patients attending clinics in Embu. Journal of Environment sustainability Advancement Research. 6: 118.
6. Nthigah, A., Gitonga, L. & Kiruki, S. (2019). Unplanned pregnancies among nursing students. A study of Fidenza Nursing School
and KMTC, Embu County. Journal of Environment sustainability Advancement Research. 6:121.
7. Itotia T. K., Muia A. W., Kiruki S. & Getenga Z. (2018). Occurrence of pathogenic bacteria harbouring antibiotic resistant genes in
River Njoro in Nakuru County, Kenya. Journal of Environment Pollution and Human Health, 6(1), 31-37.
8. Kainyu, R. M., Njagi E.N.M., George, O. and Kiruki, S. (2018). Establishment of Reference Ranges for Liver Biochemistry Tests in
Children in Meru County, Kenya. Biochemistry and Analytical Biochemistry.7:349: 1-5. Doi:104172/2161-1009.
9. Kirianki, P. R., Othira, J.O. & Kiruki, S. (2017). Analysis of Microbial Quality of Drinking Water in Njoro Sub-county, Kenya. Journal
of Environment Pollution and Human Health. 5 (1): 15-21.
10. Thirika, A., Ndiritu, F. and Kiruki, S. (2016). Effects of Magnetic Flux density on the Population density of E. coli in River Njoro
Water. International Journal of Physics. 4 (4): 113-118.
11. Othira J. O., Josiah O. O., Kiruki, S., Leonzio, A. O. & Wachira, F. N. (2013). Molecular Diversity of Arbuscular Mycorrhizal Fungi
(AMF) in Lake Victoria Basin of Kenya. Journal of Ecology & Natural Environment. 6(4): 145-152.
12. Njeru, S. N., Kiruki, S., Limo M., Mbala, M. J., Njagi, E. N.M., Okemo, P. O. & Nathan L. (2012). Antimicrobial resistance and
plasmid profiles of Aeromonas hydrophila isolated from River Njoro, Kenya. African Journal of Biotechnology. 11 (96):16284-
16290.
13. Kiruki S., (2006). Career in Biomedical Science and Technology. Career Word Publication
Kiruki, S. & Othira J. O. (2009). Generation and characterization of Striga-resistant Maize and Sorghum using Azide-based
mutagenesis. Egerton Journal of Science & Technology. 9:13-24.
14. Kiruki, S., Leonzio A. O. & Limo, M. (2006). Azide-based mutagenesis suppresses Striga hermonthica seed germination and
parasitism on maize varieties. African Journal of Biotechnology. 5(10):866-870.
15. Kiruki S., Mageto, O. K., Ncene W. B. & Gikuru, S. K. (2006). Prevalence of Multidrug resistant enteropathogenic bacteria
causing diarrhoea in Kibera community in Nairobi, Kenya. Journal of Tropical Microbiology and Biotechnology, 2:24-30.
PUBLICATIONS OF BOOK CHAPTER
1. Kiruki, S., (2019). Bacteriological quality and diarrhoeagenic pathogens in Theory and Application of Microbiology &
Biotechnology. Book publisher international, ISBN 13(15): 978-93-89562-04 (print); 978-93-89562-05-7 (e-Book).

PUBLICATIONS IN THE BOOKS OF PROCEEDINGS
1. Itotia, T. K., Muia, A. W., Kiruki, S. and Getenga, Z. (2015). Distribution and Diversity of Antibiotic Resistant Bacteria in Njoro
River in Nakuru County, Kenya, pp 319-324. Proceedings of the 2nd International Research Conference held in the Chuka Main
Campus from 28th- 30th October, 2015.
2. Njue, R., Kiruki, S., Muia, A. W. and Ngigi, A. (2018). Effects of 2,4-D and Hexazinone Application on soil Dehydrogenase activity
on Sugarcane Cultivated Soils in Nzoia Sugarcane Plantations, pp 361-371. Proceedings of the 4th International Research
Conference held in the Chuka Main Campus from 24th- 26th October, 2018, Chuka, Kenya.
3. Kiruki, S., (2012). Nostic Tool for Detection of Enteropathogenic Bacteria and Protozoa in Water. Abstract in proceedings;
International Scientific Conference on Hands-on Workshop in Point-of-Care Diagnostic held at National Museums on 25th to
29th June 2012, Nairobi, Kenya.

POSTGRADUATE SUPERVISION
1. Anti-Inflammation, Analgesic and Antipyretic Activities of Dichloromethane and Methanol Extract of Senna didymobotyra, Prunus africana, Bidens pilosa, Eucalyptus saligna and Mangifera indica.
2. Characterization of Bacteria that Degrade Herbicides in Soils Obtained from Coffee Farms in Tharaka Nithi County.
3. Biochemical Impact of Low and High Dose Catha Edulis Forsk Extracts on Rat Testicular Physiology
4. Prevalence of Aeromonas hydrophila in River Njoro, Kenya
5. Magnetic Field Intensities as an Alternative Water Purification Approach
6. Determination of the Combined Antibacterial and Antifungal Activities of Clove and Eucalyptus citriodora.
7. Distribution and Diversity of Antibiotic Resistant Bacteria in Selected Agro-Industrial Polluted Rivers in Nakuru and Nzoia Counties.
8. Characterization of Mineralogical composition and Chemical properties of Clay soils from selected Sites in Eastern and Western Kenya.
9. Molecular Characterization of Herbicide Degrading Bacteria in Sugar Plantation in Western Kenya
10. Synthesis, Antibacterial and Larvicidal activities of Fluorinated Hydroxytriazene Derivatives Bearing Sulphonamide Moiety and their Co (II) and Ni (II) Complexes.
11. Efficacy of the Kipevu Sewage Treatment Plant on Removal of Organic Matter and Coliforms in Mombasa County, Kenya.
12. Establishment of Reference Ranges for Biochemical parameters in Children in Meru county.
13. Secondary Prevention Practices Among Adult Patients with Type 2 Diabetes Mellitus at Meru Level 5 Hospital and Nkubu Consolata Hospital, Kenya
14. Patient’s and Family’s Perceptions Towards Diagnosis of Prostate Cancer in Tharaka Nithi County, Kenya
15. Influence of Foot Care on Foot Ulcer Development among non-insulin-dependent diabetes mellitus (NIDDM) Patients Attending Clinics in Embu County, Kenya.
16. Impact of Karatina Sewer Stabilization Ponds on Biological and Physio-chemical Properties of Water Along R. Ragati Ecosystem in Nyeri County, Kenya.
17. Characterization of Antibiotic Producing actinomycetes from River Tana and Lake Elementaita in Kenya
18. Phytochemical Analysis, in Vitro Antibacterial, Anti-Inflammatory, Cytotoxicity Testing of Aqueous and Ethanolic Leaf Extract of Solanum Incanum and Tamarindus Indica
19. Isolation, Identification and antibiogram of Staphylococcus aureus isolated in retail cow meat in Samburu County, Kenya.
20. Prevalence and Antimicrobial Susceptibility Patterns of Enteric Gram Negative Bacteria Isolated from Water and Fish in Upper Tana River
21. Isolation, characterization and determination of Secondary Metabolites of Acremonium chrysogenum Species from soils of Embu Municipal Dumpsite
22. Mycotoxicosis contamination of food products sold at Tharaka Nithi County, Kenya
23. Determination of the effect of chronic khat use on testosterone and cortisol in male winster rats
24. Determination of Antimicrobial Resistance and Genes of Escherichia coli and Pseudomonas aeruginosa isolated from water resources in Njoro sub-county, Kenya
25. Effects of antibiotics on neonate gut microflora