Articles | Nigerian Journal of Microbiology

1

Research Article DOI: 10.67614/njm.2026.396g1pua

Isolation and Screening of Aspergillus niger Mutant for Improved Gluconic Acid Production

Ayodele E. O., Afolabi F. T.^*

Gluconic acid (GA, C6H12O7, or 2, 3, 4, 5, 6-pentahydroxyhexanoic acid) is a mild organic acid resulting from the oxidation of D-glucose. Gluconic acid has low toxicity, low corrosion and form complexes with metal ions giving it wide application in several industries. This study aimed to isolate and screen for Aspergillus niger mutant for improved gluconic acid production. A total of 204 A. niger ...

Jun, 2026 pp. 7943 - 7954 12 views 4 downloads

2

Research Article DOI: 10.67614/njm.2026.028ne9ai

Effect of Physiochemical Characteristics and Microbial Water Quality on Tensile Strength of Eichhornia crassipes Harvested from Four Rivers in Southwest Nigeria

Akinmola E. A.^*, Olalemi A. O., Emidun O. B., Adiji B. E.

This study investigated the influence of microbial water quality and physicochemical characteristics of the aquatic environment supporting the growth of water hyacinth on the mechanical properties of its fibre. Water hyacinth and water samples were collected from four rivers (Igbokoda, Makun, Epe and Badagry) in Southwest Nigeria. The load of faecal indicator bacteria in the water samples and the ...

Jun, 2026 pp. 7933 - 7942 12 views 5 downloads

3

Research Article DOI: 10.67614/njm.2026.qt3dn6ni

High Prevalence of Multidrug-Resistant Pseudomonas aeruginosa in Pre-Treated Pharmaceutical Wastewater: Evidence of Treatment Failure in Nigerian Manufacturing Facilities

Olaosebikan O. O., Nomeh O. L., Ogba R. C., Peter I. U.^*, Iroha I. R.

Pharmaceutical wastewater treatment plants are intended to mitigate environmental contamination, yet their efficacy against critical priority pathogens like Pseudomonas aeruginosa in low- resource settings remains unverified. This study isolated P. aeruginosa exclusively from pre-treated effluents across three Nigerian pharmaceutical facilities to assess treatment performance and compare inter-fac...

Jun, 2026 pp. 7921 - 7932 15 views 7 downloads

4

Research Article DOI: 10.67614/njm.2026.s0ja544x

Evaluation of Chicken Feathers Degraded by Keratinase for Poultry Feed Supplement

Okediji E. F.^*, Adegunloye D. V.

Chicken feathers pose a significant environmental challenge due to their high resistance to natural degradation. It accumulates in the environment and constitutes serious problems to human health. The study was conducted to degrade chicken feathers by keratinase from selected bacteria isolated from soil samples containing chicken feather waste and the resulting hydrolysate used as a supplement in ...

Jun, 2026 pp. 7913 - 7920 12 views 5 downloads

5

Research Article DOI: 10.67614/njm.2026.tt1kekj2

Occurrence of Multidrug-Resistant Escherichia coli in Abuja Wastewater Treatment Plant and Wupa River

Stella N Madueke, Ibangha I-A. I., Ozochi A. C., Onyeiwu S. C., Anyanwu C. U., Chigor V. N.^*

The discharge of multidrug-resistant bacteria into the environment can promote the transfer of resistance genes to clinically important bacteria, thereby posing a substantial public health risk. This study evaluated Escherichia coli isolated from the Abuja wastewater treatment plant and the Wupa River in Abuja, Nigeria, for multidrug resistance (MDR) and antibiotic resistance genes (ARGs). Isolate...

Jun, 2026 pp. 7900 - 7912 14 views 7 downloads

6

Research Article DOI: 10.67614/njm.2026.vccxp7qp

Biodegradation of Hydrocarbons by Bacillus cereus and Enterococcus casseliflavus Isolated from Crude oil Contaminated Seafood

Akomah-Abadaike O. N.^*, Mbolo P. F.

This study aims to determine the biodegradability capacity of Enterococcus casseliflavus and Bacillus isolated from crude oil contaminated seafood. Fresh seafood samples such as crude oil contaminated periwinkle and prawn were obtained. BOD, COD, pH, nitrate, phosphate, heavy metals (Cr, Cd, Pb, Zn), polyaromatic hydrocarbons (PAHs), total petroleum hydrocarbon (TPH} were determined. Standard micr...

Jun, 2026 pp. 7887 - 7899 13 views 5 downloads

7

Research Article DOI: 10.67614/njm.2026.8l64d5uy

Optimisation of Lipases from Fungi Associated with Palm Oil Mill Soils

Abiola O. F. A.^*

Lipases are industrially significant enzymes applied in food processing, detergents, pharmaceuticals, cosmetics, and biodiesel manufacture. Palm oil mill effluent (POME), though nutrient- rich and supportive of microbial growth, is also a major pollutant of the environment. Exploring lipolytic fungi from such soils provides a dual benefit of waste management and enzyme generation. Soil samples fro...

Jun, 2026 pp. 7880 - 7886 15 views 5 downloads

8

Research Article DOI: 10.67614/njm.2026.3f8blobr

Cephalosporin, Colistin, and Beta-Lactamase Inhibitor Resistance in Clinical Pseudomonas aeruginosa Isolates: Associations with Patient Age and Gender in a Nigerian Tertiary Hospital

Uzoeto H. O.^*, Mohammed I. D., Ukpai E. G., Peter I. U.

Pseudomonas aeruginosa is a leading cause of healthcare-associated infections with remarkable capacity for antimicrobial resistance. This study investigated the resistance profiles of clinical P. aeruginosa isolates, focusing on cephalosporins, colistin, and beta-lactamase inhibitors, and examined associations with age group and gender. A total of 250 clinical samples (150 urine, 100 wound swabs) ...

Jun, 2026 pp. 7870 - 7879 12 views 5 downloads

9

Research Article DOI: 10.67614/njm.2026.vdvtilqx

Prevalence, Antibiotic Susceptibility Profile, and Multiple Antibiotic Resistance Index of Gram-Negative Bacteria Isolated from Skin and Nasal Samples of Goats Bred in Abakaliki, Ebonyi State, Nigeria

Ukpai E. G.^*, Okwuonu C. A.

Antimicrobial resistance (AMR) is a critical global public health threat, with food-producing animals recognized as important reservoirs of multidrug-resistant (MDR) bacteria. In Nigeria, indiscriminate antibiotic use and weak regulatory frameworks have exacerbated resistant pathogen spread. Goats (Capra hircus) are widely reared in Abakaliki, Ebonyi State, serving as major meat and income sources...

Jun, 2026 pp. 7857 - 7869 13 views 5 downloads

10

Research Article DOI: 10.67614/njm.2026.3a85uf7r

Antibacterial Activities of Tiger Nuts Extracts against Bacteria Isolated from Diarrheagenic Stools Obtained from Selected Hospitals in Akure, Nigeria

Olalemi A. O., Adetoye A. A.^*

Diarrheal diseases remain a global health burden, especially in developing countries where antibiotic resistance complicates treatment. This study investigated the antibacterial activities of n-hexane and ethanolic extracts of tiger nut (Cyperus esculentus) against bacterial isolates obtained from diarrheagenic stool samples collected from selected hospitals in Akure, Nigeria. Stool samples were c...

Jun, 2026 pp. 7846 - 7856 12 views 5 downloads