Acta Medical and Health Sciences (AMHS)
Vol. 4 No. 3 (2026): Acta Medical and Health Sciences

Airborne bacteria and fungi monitoring in a microbiology laboratory

Alya S A Ramadhani (Medicine Study Program, Faculty of Medicine, Universitas Jenderal Achmad Yani, Cimahi, Indonesia)
Siska T Pratiwi (Department of Microbiology, Faculty of Medicine, Universitas Jenderal Achmad Yani, Cimahi, Indonesia)
Kiki Puspitasari (Department of Psychiatry, Faculty of Medicine, Universitas Jenderal Achmad Yani, Cimahi, Indonesia.)



Article Info

Publish Date
28 Feb 2026

Abstract

The presence of airborne microorganisms in laboratory environments may increase the risk of microbial exposure among laboratory personnel. Indoor bioaerosols can affect air quality and potentially pose health risks if environmental conditions are not adequately controlled. This study aimed to identify airborne bacteria and fungi present in the office room of the Microbiology Laboratory, Faculty of Medicine, Universitas Jenderal Achmad Yani. Air sampling was performed using the passive settle plate method at three sampling points, with Tryptic Soy Agar (TSA) used for bacterial isolation and Sabouraud Dextrose Agar (SDA) used for fungal isolation. Environmental measurements during sampling recorded a temperature of 25.1°C and a relative humidity of 63%. Bacterial and fungal growth were observed on TSA and SDA plates, respectively, with bacterial colony counts ranging from 0 to 24 colonies. A total of six bacterial isolates were successfully recovered. Bacterial identification was performed based on colony morphology observation, Gram staining, biochemical tests, and molecular analysis using polymerase chain reaction (PCR) and DNA sequencing. Fungal identification was conducted based on macroscopic characteristics and microscopic examination using Lactophenol Cotton Blue staining. Molecular analysis identified the bacterial isolates as Staphylococcus hominis, Staphylococcus epidermidis, Mammaliicoccus sciuri, and Stutzerimonas stutzeri, whereas fungal isolates were morphologically consistent with Penicillium sp. and other suspected hyaline filamentous fungi. The predominance of Gram-positive bacteria and the detection of airborne fungi may be associated with limited ventilation, indoor humidity, and human-related activities within the laboratory environment. These findings demonstrate the diversity of indoor bioaerosols in a laboratory environment and highlight the importance of routine microbiological air monitoring, humidity control, and adequate ventilation to support occupational health and laboratory safety.   DOI : 10.35990/amhs.v4n3.p124-132   REFERENCES Abatenh A, Habtemariam Z, Gizaw B. Contamination in a microbiological laboratory. Int J Res Stud Biosci. 2018;6(4):7–13. https://doi:10.20431/2349-0365.0604002 Kumar P, Kausar MA, Singh AB, Singh R. Biological contaminants in the indoor air environment and their impacts on human health. Air Qual Atmos Health. 2021;14(11):1723–. https://doi:10.1007/s11869-021-00978-z Firdaussyah AT, Montolalu IA, Azzahra S. Indoor air quality: sources, health effects, and mitigation strategies. Glob Int J Innov Res. 2024;2(11):2558–2581. https://doi:10.59613/global.v2i11.354 Seseña S, Rodríguez AM, Palop ML. Indoor air quality analysis in naturally ventilated university training laboratories. Air Qual Atmos Health. 2022;15(10):1817–1837. https://doi:10.1007/s11869-022-01220-0 Lee H, Lee BG, Kim YJ, Shim J, Yeo M. Assessment of airborne bacteria in public-use facilities. Air Qual Atmos Health. 2024;17(8):1725–1738. https://doi:10.1007/s11869-024-01540-3 Asri WA, Fatimah S, Hapsari IN, Rifansaputra Y, Dewi L. Identifikasi mikroorganisme di lingkungan udara dalam laboratorium mikrobiologi. J Ilm Mhs. 2024;2(4):42–47. Wei X, Ma X, Tian F, Wei Z, Zhang L, Hu K. Sampling and analysis methods of airborne microorganisms in hospital air. Biotechniques. 2024;76(8):395–. https://doi:10.1080/07366205.2024.2372939 Song CG, Park JH, Lee PM, Jung MG. Survey of airborne microorganisms in a traditional market. Int J Environ Res Public Health. 2022;19(11):6667. https://doi:10.3390/ijerph19116667 Madhaiyan M, Wirth JS, Saravanan VS. Phylogenomic analyses of the Staphylococcaceae family. Int J Syst Evol Microbiol. 2020;70(11):5926–5936. https://doi:10.1099/ijsem.0.004498 Ilies AB, Burtă O, Hadeel SAH, Mircea C, Shomali M, Caciora T, et al. Integrated analysis of indoor air quality and fungal microbiota in educational heritage buildings. Sustainability. 2025;17(3):1091. https://doi:10.3390/su17031091 Rahmah WN, SF, MYES. Identifikasi bakteri pada nutrient agar plate di Laboratorium Mikrobiologi Universitas Muhammadiyah Palangka Raya. Borneo J Med Lab Technol. 2023;:338–343. Najjar AA. Fungi as indicators of indoor air quality: a survey of a building in a university. JKAU Met Environ Arid Land Agric Sci. 2025;34(1):1–14. https://doi:10.4197/Met.34-1.1 Jones ER, Cedeño Laurent JG, Young AS, Coull BA, Spengler JD, Allen J. Indoor humidity levels and associations with reported symptoms in office buildings. Indoor Air. 2022;32(1):e12961. https://doi:10.1111/ina.12961 Echioda-Ogbole M, Ameh JA, Mailafia S, et al. Characterization of Mammaliicoccus sciuri. UJMR. 2025;10(3):64–69. https://doi:10.47430/ujmr.25103.008 Rahman A, Akter S, Sadique A, et al. Whole genome sequence of Stutzerimonas stutzeri. Microbiol Resour Announc. 2024;13(4). https://doi:10.1128/mra.00001-24 Saif FA, Yaseen SA, Alameen AS, Mane S, Undre P. Identification of Penicillium species using morphology. J Phys Conf Ser. 2020;1644:012019. https://doi:10.1088/1742-6596/1644/1/012019 Dissanayake AJ, Liu JK. Ascomycota: diversity, taxonomy and phylogeny. J Fungi. 2025;11(6):419. https://doi:10.3390/jof11060419 Rana U, Juyal P, Joshi K, Pant P, Rawat S, Gupta S. Fungi, lichen, viruses and bacteria. Haldwani: Uttarakhand Open University; 2021. Bhosale NK, Prabha R, Munuswamy R, Pramodhini S, Easow JM. Phenotypic versus molecular identification of clinical dermatophytes. J Pure Appl Microbiol. 2022;16(2):1138–1146. https://doi:10.22207/JPAM.16.2.40 Garcia-Rubio R, de Oliveira HC, Rivera J, Trevijano-Contador N. The fungal cell wall: structure, synthesis and assembly. Front Microbiol. 2020;10:2993. https://doi:10.3389/fmicb.2019.02993

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Journal Info

Abbrev

acta_medica

Publisher

Subject

Biochemistry, Genetics & Molecular Biology Health Professions Immunology & microbiology Medicine & Pharmacology Public Health

Description

Acta Medical and Health Sciences (AMHS) is a scientific journal that publishes research articles, case reports, literature reviews, and other topics relevant to the field of medicine and health, either clinically or to the biomolecular level. Manuscript under consideration that may be uploaded is a ...