Abstract
A mycological survey of Nigerian currency (naira) notes in circulation in Benin City was undertaken to determine the fungal species present, so as to bring to light the health implications of their presence. A total of 84 naira notes comprising 20, 50, 100, 200 and 500 naira denominations were obtained randomly from a bank, commuter bus, food canteen, and open market. Four-day old Potato Dextrose Agar cultures of diluted water diffusate of the currency notes were examined under the microscope and fungi were isolated and identified. The isolated fungi and their frequencies of isolation were A. flavus (90.5), A. fumigatus (42.9), A. terreus (57.1), A. flavipes (26.2) A. niger (59.5), Candida albicans (92.3), Rhizopus sp (2.7), Penicillium sp (4.0), Fusarium sp (12.8), and Saccharomyces cerevisae (16.1%). The frequencies of fungi isolated from the various denominations varied significantly at 0.05 probability. While the 50 naira denomination had the highest colony count (mean of means = 41 colonies/ml) the 500 naira had the lowest colony count (mean of means =8.3 colonies/ml). The high occurrence of fungi in the currency notes is of public health concern.
Keywords: Currency, Notes, Fungi, Health, Nigeria
References
- 1.Michaels B. Handling money and serving ready-to-eat food. Food Serv Technol. 2002;2:1–3. doi: 10.1046/j.1471-5740.2002.00030.x. [DOI] [Google Scholar]
- 2.Basavarajappa K.G., Rao P.N., Suresh K. Study of bacterial, fungal and parasitic contamination of currency notes in circulation. Indian J Pathol Microbiol. 2005;48:278–279. [PubMed] [Google Scholar]
- 3.Yildiran S.T., Mutlu F.M., Saracli M.A., Uysal Y., Gonlum A., Sobaci G., Sutton D.A. Fungal endophthalmitis caused by Aspergillus ustus in a patient following cataract surgery. Med Mycol. 2006;44:665–669. doi: 10.1080/13693780600717161. [DOI] [PubMed] [Google Scholar]
- 4.Singh N., Limaye A.P., Forrest G., Safdar N., Munoz P., Pursell K., Houston S., Rosso F., Montoya J.G., Patton P.R., Busto R.D., Aguado J.M., wagener M.M., Husain S. Late — onset invasive aspegillosis in organs transplant recipients in the current era. Med Mycol. 2006;44:445–449. doi: 10.1080/13693780600684494. [DOI] [PubMed] [Google Scholar]
- 5.Denning D.W. Aspergillus and aspergillosis — Progress on many fronts. Med Mycol. 2006;44:1. doi: 10.1080/13693780600931192. [DOI] [PubMed] [Google Scholar]
- 6.Olasupo N.A., Olukoya D.K., Niemogha M.T., Olatunde O.O. Bacterial flora of dirty naira notes. The Nig Med Pract. 1992;38:4–8. [Google Scholar]
- 7.Varga J., Juhasz A., Kevei F., Kozakiewicz Z. Molecular diversity of agricultural important Aspergillus species. Europ J Plant Pathol. 2004;110:627–640. doi: 10.1023/B:EJPP.0000032402.36050.df. [DOI] [Google Scholar]
- 8.Mohammad S., Shehu Kand Amusa N.A. Survey of the market diseases and aflatoxin contamination of tomato (MILL) fruits in Sokoto, Northwestern Nigeria. Nut Food Sci. 2004;34:72–76. doi: 10.1108/00346650410529032. [DOI] [Google Scholar]
- 9.Horner W.E. Managing building-related Aspergillus exposure. Med Mycol. 2006;44:33–38. doi: 10.1080/13693780600925194. [DOI] [PubMed] [Google Scholar]
- 10.Klich M.A. Identification of Common Aspergillus species. Netherlands: CBS; 2000. [Google Scholar]
- 11.Larone D.H. Medically Important Fungi: A Guide to Identification. 4th edition. Washington DC: ASM Press; 2002. [Google Scholar]
- 12.Buzzini P., Martini A. Extracellular enzymatic activity profiles in yeast and yeast-like strains isolated from tropical environments. J Appl Microbiol. 2002;93:1020–1025. doi: 10.1046/j.1365-2672.2002.01783.x. [DOI] [PubMed] [Google Scholar]
- 13.Nwadiaro P.O., Ocheikwu B.I. Fungal air — spora of Jos, Plateau State. Nig J Bot. 2006;19(2):406–418. [Google Scholar]
- 14.Woodcock AA, Steel N, Moore CB, Howard SJ, Custovic A and Denning DW (2005) Fungal contamination of bedding. Allergy. DOI:10.1111/j.1398-9995.2005.00941.x [DOI] [PubMed]
- 15.Ikhatua M.I., Asaa L.N. Mycoflora of retail Irvingia seeds in Benin City, Edo State, Nigeria. Nig J Bot. 2006;19(2):252–258. [Google Scholar]
- 16.Singh D.V., Thakur K., Kalpana, Goel A. A microbiological surveillance of currency. Indian J Med Microbiol. 2002;20:53–58. [PubMed] [Google Scholar]