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All Journal Journal of Multidisciplinary Science: MIKAILALSYS Asian Journal of Science, Technology, Engineering, and Art
Muhammad, Shamsudeen Muhammad
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Agriculture, Biological Sciences & Forestry Arts Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Engineering Environmental Science Physics Social Sciences Other

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Microbiological Analysis of Indoor Air in Selected Primary Schools: Health Concerns and Recommendations Muhammad, Shamsudeen Muhammad
Journal of Multidisciplinary Science: MIKAILALSYS Vol 1 No 2 (2023): Journal of Multidisciplinary Science: MIKAILALSYS
Publisher : Darul Yasin Al Sys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/mikailalsys.v1i2.1571

Abstract

The quality of indoor air in various buildings is crucial for maintaining the health and well-being of individuals. Exposure to airborne microorganisms can have detrimental effects on respiratory health. This study aimed to evaluate the microbiological quality of indoor air in selected primary schools in Aliero, Nigeria. Three primary schools were randomly chosen, air samples were collected using settle plates. Petri dishes containing different culture media were exposed twice daily (morning and noon). The number of organisms per cubic meter of air (CFU/m³) was recorded, and standard microbiological methods were used to identify bacterial and fungal isolates. The study revealed a wide range of bacterial and fungal contamination in classroom environments. Bacterial loads ranged from 543-165 CFU/m³, while fungal loads ranged from 146- 32 CFU/m³. Four bacterial species and five fungal genera were identified. The bacteria included Bacillus spp, Proteus spp, Staphylococcus aureus, and Micrococcus spp, while the fungal genera isolated included Aspergillus spp, Mucor spp, Fusarium spp, Penicillium spp, and Rhizopus spp. The most prevalent bacteria were Bacillus spp (34.38%) and Micrococcus spp (28.13%), while the most frequently isolated fungi were Fusarium spp (36.36%) and Penicillium spp (33.33%). The finding of this study has shed light on the indoor air quality of selected primary schools in Aliero. The present study also revealed the microbial diversity as well as the frequency of occurrence of various isolates. Measures such as improved ventilation, stringent cleaning protocols, and regular monitoring to ensure a healthier indoor environment for both students and staff.
Unveiling the Roles of Microorganisms in Promoting Environmental Sustainability Muhammad, Shamsudeen Muhammad; Saadu, Murtala
Asian Journal of Science, Technology, Engineering, and Art Vol 1 No 1 (2023): Asian Journal of Science, Technology, Engineering, and Art
Publisher : Darul Yasin Al Sys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/ajstea.v1i1.1783

Abstract

The environment is described as the situations or factors that encircle an individual organism or a collection of organisms. Environmental sustainability refers to the responsible and balanced management of natural resources and ecosystems to meet the needs of the present without compromising the ability of future generations to meet their own needs. Microorganisms play a critical and multifaceted role in promoting environmental sustainability by participating in various ecological processes and functions. This paper explores the roles of microbes in maintaining environmental sustainability. Microbes, encompassing bacteria, archaea, fungi, protists, and viruses, exhibit remarkable functional diversity across diverse habitats, allowing them to contribute to key environmental challenges. The challenges facing environmental sustainability, include climate change, biodiversity loss, resource depletion, pollution, deforestation, and lack of public awareness on environmental issues. Microbes contribute significantly to addressing these challenges through nutrient cycling, bioremediation, waste management, renewable energy production, climate change mitigation, ecosystem health maintenance, and enhancing agriculture and food security. The capabilities of microbes provide promising avenues for creating a more sustainable future. By elucidating the contributions of microbes to environmental sustainability, this paper underscores their pivotal role in shaping resilient and balanced ecosystems for present and future generations. As we strive for a more sustainable future, harnessing the potential of these tiny yet powerful creatures can significantly contribute to achieving a harmonious coexistence between humanity and the natural world. Further research is needed to investigate ways to engineer and optimize microbial processes for enhanced nutrient cycling, bioremediation, and waste management.
Antibacterial Activity of Khaya senegalensis Stem Bark Against Salmonella typhi Isolated from Meat Handling Environments Murtala, Saadu; Muhammad, Shamsudeen Muhammad; Damilola, Samson Blessing
Journal of Multidisciplinary Science: MIKAILALSYS Vol 4 No 1 (2026): Journal of Multidisciplinary Science: MIKAILALSYS
Publisher : Darul Yasin Al Sys

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58578/mikailalsys.v4i1.9047

Abstract

Against the backdrop of escalating antibiotic resistance, medicinal plants continue to attract attention as potential sources of alternative antibacterial agents. This study evaluated the antibacterial efficacy of crude ethanol stem bark extract of Khaya senegalensis against environmental isolates of Salmonella typhi recovered from slaughter slab surfaces and meat handlers’ aprons. The stem bark extract was subjected to qualitative phytochemical screening, while environmental swab samples were cultured for the isolation and biochemical identification of S. typhi. Antibacterial activity was assessed at concentrations ranging from 12.5 to 100 mg/mL using the agar well diffusion method, whereas the minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) were determined through standard broth dilution and subculturing procedures. Data were analyzed using one-way analysis of variance, with statistical significance set at p < .05. The phytochemical screening revealed the presence of alkaloids, phenolic compounds, tannins, saponins, and steroids. The extract demonstrated concentration-dependent antibacterial activity against all tested isolates, with mean zones of inhibition ranging from 8.00 ± 1.15 mm to 16.00 ± 1.53 mm. The MIC values ranged from 25 to 50 mg/mL, while the MBC was 100 mg/mL for all isolates. Significant differences in antibacterial activity were observed across extract concentrations for most isolates. These findings indicate that K. senegalensis stem bark possesses appreciable antibacterial activity against environmental Salmonella typhi isolates, thereby supporting its traditional medicinal use. The study contributes to the growing evidence that Khaya senegalensis may serve as a promising natural source of antibacterial compounds for addressing antimicrobial resistance and controlling foodborne infections.
Co-Authors Damilola, Samson Blessing Murtala, Saadu Saadu, Murtala