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Fredrick O. Ogolla

Publications (6)

Pathogenicity of Alternaria Species Causing Tomato Blight in Agro-Ecological Zones of Kirinyaga County in Kenya

Fredrick O. Ogolla, Moses M. Muraya & Benson O. Onyango · Asian Journal of Advances in Agricultural Research · 2023

Tomato (Lycopersicon esculentum Mill) is a highly consumed and produced vegetable crop with an annual global production of over 185 million tonnes. High consumption and production are due to its nutritional and health benefits. However, tomato production is characterized by incon...

Open access Research Article 10.9734/ajaar/2023/v22i1430

Antimicrobial Profiling of Selected Medicinal Plants from West Pokot, Kenya: Plant Parts and Concentration-Specific Effects

Gershom Ayora Nyasimi, David Mutisya Musyimi, Nkatha Gacheri Muriira & Fredrick O. Ogolla · Microbiology Research Journal International · 2026

Antimicrobial resistance has increased interest in evaluating medicinal plants as potential sources of bioactive compounds. This study evaluated the antibacterial and antifungal activities of selected medicinal plants from West Pokot County, Kenya, and determined the effects of p...

Open access Research Article 10.9734/mrji/2026/v36i71759

Species- and Organ-dependent Variation in Phytochemical Composition and Antioxidant Activity of Selected Medicinal Plants from West Pokot, Kenya

Gershom Ayora Nyasimi, David Mutisya Musyimi, Nkatha Gacheri Muriira & Fredrick O. Ogolla · Asian Journal of Research in Botany · 2026

Medicinal plants remain important sources of bioactive compounds; however, comparative evidence on how plant species and organs influence phytochemical composition and antioxidant potential remains limited for several traditionally used taxa in sub-Saharan Africa. This study eval...

Open access Research Article 10.9734/ajrib/2026/v9i2322

Screening of Antimicrobial Activity of Poly Herbal Extracts against Bacterial Pathogens Causing Gastroenteritis in Tharaka Nithi County, Kenya

Mbithe P. Kiteme, Benson O. Onyango, Eric C. Njagi & Fredrick O. Ogolla · South Asian Journal of Research in Microbiology · 2023

Herbals   have been used for decades to treat gastrointestinal infections across the world, including in Tharaka-Nithi County, Kenya. Crude extracts from herbs have long been prescribed by traditional healers for treatment of typhoid, cholera, and shigellosis. However, the effect...

Open access Research Article 10.9734/sajrm/2023/v15i2284

Effect of pH, Carbon and Nitrogen Sources on Antibiotic Production by Actinomycetes Isolates from River Tana and Lake Elementaita, Kenya

Bonface O. Shikuku, Silas Kiruki, Eric Kuria, Domnic Mayo & Fredrick O. Ogolla · Asian Journal of Research in Biochemistry · 2023

The escalating concern over antibiotic resistance and its profound impact on public health have underscored the urgent need to explore alternative reservoirs of antimicrobial agents. In this regard, Actinomycetes have emerged as a compelling area of investigation due to their rem...

Open access Research Article 10.9734/ajrb/2023/v13i1248

Characterization of Antibiotic-producing Actinomycetes Isolated from River Tana and Lake Elementaita in Kenya

Bonface O. Shikuku, Silas Kiruki, Eric Kuria, Martin Mutembei & Fredrick O. Ogolla · Asian Journal of Research in Biochemistry · 2023

The rise of antibiotic-resistant bacteria has become a global health concern, necessitating the search for novel sources of antibiotics. Actinomycetes, a group of microorganisms, have been known for their ability to produce bioactive compounds with antimicrobial properties. This...

Open access Research Article 10.9734/ajrb/2023/v13i1247