http://ir.library.ui.edu.ng/handle/123456789/350 Microbiology Fri, 03 Apr 2026 17:23:50 GMT 2026-04-03T17:23:50Z http://ir.library.ui.edu.ng/handle/123456789/3155 Title: Candidaemia or candidasis: controversy of staphylococcus sexually transmitted infection? Authors: Ogunshe, A. O. Abstract: Herbal medications are becoming increasingly popular but a most-extraordinary claim by traditional/herbal medical practitioners relates to a Gram-positive bacterium, Staphylococcus, which has been depicted as a deadly sexually transmitted disease that manifest in the form of worms and other symptoms; with contributory roles including infertility, sexual dysfunction and impotency. They further boasted that they are the only ones that possessed the remedy (herbal) for the Staphylococcus sexually transmitted scourge. In the absence of distinguishing phenotypic taxonomic tools, Staphylococcus and Candida spp. may be confused for each other. However, Staphylococcus is a bacterium and not an infection; therefore, there must be more to the traditional medical practitioners’ boasts in ability to cure an infection that was not an infection in the first place. In conclusion, the common sense is that candiaemia or candidiasis is most likely the misdiagnosed sexually transmitted Staphylococcus disease, which is of significant human clinical health issue. Fri, 01 Jan 2016 00:00:00 GMT http://ir.library.ui.edu.ng/handle/123456789/3155 2016-01-01T00:00:00Z http://ir.library.ui.edu.ng/handle/123456789/3102 Title: Phytochemical screening and microbial inhibitory activities of ficus capensis Authors: Adebayo-Tayo, B. C.; Odeniyi, A. O. Abstract: Ficus plant components have application in traditional medicine because of the myriad uses they have been subjected to. The ease of application is based on the secondary metabolites this plant contains. The challenges faced by modern medicine especially in the complete cure of microbially-associated diseases through abrupt and unpredictable genetic mutations in the presence of conventional drugs informed the investigation of the microbial inhibitory activities of the stem, root and leaf parts of F. capensis against test disease causing microorganisms. The phenolic, alkaloid and tannin phytochemical fractions were highest in F. capensis bark extract (180, 165 and 155 μg/ml respectively) followed by that contained in the stem extract (100, 90 and 85 μg/ml respectively). While Streptococcus faecalis and Pseudomonas mirabilis were resistant to many different antibiotics (87.5%), they were effectively inhibited by all concentrations of ethanolic F. capensis extracts. The minimum inhibitory concentration of ethanolic extracts ranged from 25% leaf and stem extract concentration respectively (4mm) against S. faecalis and (2mm) against P.mirabilis. All test isolates were 100% susceptible to ethanol extract growth inhibition.. Sun, 01 Jan 2012 00:00:00 GMT http://ir.library.ui.edu.ng/handle/123456789/3102 2012-01-01T00:00:00Z http://ir.library.ui.edu.ng/handle/123456789/3095 Title: Candidaemia or candidasis: controversy of staphylococcus sexually transmitted infection? Authors: Ogunshe, A. O. Abstract: Herbal medications are becoming increasingly popular but a most-extraordinary claim by traditional/herbal medical practitioners relates to a Gram-positive bacterium, Staphylococcus, which has been depicted as a deadly sexually transmitted disease that manifest in the form of worms and other symptoms; with contributory roles including infertility, sexual dysfunction and impotency. They further boasted that they are the only ones that possessed the remedy (herbal) for the Staphylococcus sexually transmitted scourge. In the absence of distinguishing phenotypic taxonomic tools, Staphylococcus and Candida spp. may be confused for each other. However, Staphylococcus is a bacterium and not an infection; therefore, there must be more to the traditional medical practitioners’ boasts in ability to cure an infection that was not an infection in the first place. In conclusion, the common sense is that candiaemia or candidiasis is most likely the misdiagnosed sexually transmitted Staphylococcus disease, which is of significant human clinical health issue. Fri, 01 Jan 2016 00:00:00 GMT http://ir.library.ui.edu.ng/handle/123456789/3095 2016-01-01T00:00:00Z http://ir.library.ui.edu.ng/handle/123456789/814 Title: DEGRADATION OF POLYAMIDE-6 BY MICROBIAL ISOLATES FROM SOLID WASTE DUMPSITES IN LAGOS STATE, NIGERIA Authors: SANUTH, H. A. Abstract: Polyamide-6 (also known as nylon-6) is one of the biodegradation-resistant synthetic polymers used in the manufacturing of commodity plastic materials. The environmental effects of the persistence of this material in landfill and on surface water bodies pose global problems that endanger public health. Knowledge of the microbial distribution and pattern of their interaction with these plastics will provide the biological resources and scientific basis for the development of sustainable disposal and treatment method. Therefore, microbial degradation of polyamide-6 and its monomers were investigated. Soil samples were randomly collected at five spots to a depth of 15cm and mixed to form composites from each of the three selected dumpsites at Olusosun, Abule-Egba and Isheri-Igando in Lagos state. Microbiological analysis was carried out on the samples on bimonthly intervals over a period of eight months. The fungal and bacterial isolates were screened for their ability to utilize ε-caprolactam (the monomer of the nylon-6) as a sole source of carbon and nitrogen for growth on a synthetic solid medium and were phenotypically characterized. The 16SrRNA gene sequences were used for the molecular typing of the isolates. The isolates with the best growth within 120hrs in ε-caprolactam medium were tested for nylon-6 degradation. Intermediate products in the culture medium were monitored using High Performance Liquid Chromatography (HPLC) while biodegradation of the nylon-6 was monitored using Fourier Transform Infrared Spectroscopy (FTIR), average number molecular mass (Mn) and weight loss. An un-inoculated experiment served as the control. Data obtained were analysed using ANOVA. A total of 64 bacteria and 22 fungi were isolated from the soil samples. Sixteen species of the bacterial isolates made up of the genera Pseudomonas (5), Alcaligenes (3), Corynebacterium (2), Leucobacter (2), Bordetella (1), Proteus (1), Providencia (1) and Lysinibacillus (1) were capable of utilising ε-caprolactam as the sole source of carbon and nitrogen up to a minimum inhibitory concentration of 20 gL-1. The fungi were identified as five species of Aspergillus and a species of Penicillium. Proteus vulgaris utilized 97.2%, Bordetella petrii 92.5%, Pseudomonas aeruginosa (NTS1) 90.5% and Alcaligenes faecalis (2ABA2) 82.3% of 10 gL-1 ε-caprolactam within 120hrs compared to the control experiment. The HPLC analysis of the culture supernatant revealedthe presence of 6-aminohexanoic acid, ε-caprolactam and some un-identified oligomers as the degradation products of the nylon-6 fibre. The changes observed in the FTIR spectra of different functional groups confirmed the effect of microbial degradation of the nylon-6 fibre. Aspergillus niger was the most efficient of the fungi isolates in degrading the polyamide-6. It achieved 29.77 % reduction in polyamide-6 Mn and 23.95 % weight loss. Moreover, P. aeruginosa (NTS1) degraded Polyamide-6 with 12.82 % reduction in Mn and 5.23% weight loss. These changes were found to be significant at p = 0.05. Aspergillus niger and Pseudomonas aeruginosa degraded nylon-6 fibre and this serves as baseline information for the bio-treatment of the nylon polymer. Description: A Thesis in the Department of Microbiology Submitted to the Faculty of Science in Partial Fulfillment of the requirement for the Degree of DOCTOR OF PHILOSOPHY of the UNIVERSITY OF IBADAN. Mon, 01 Oct 2012 00:00:00 GMT http://ir.library.ui.edu.ng/handle/123456789/814 2012-10-01T00:00:00Z