Obidi O F, Aboaba O O, Makanjuola M S, Nwachukwu S C U
Department of Botany and Microbiology, University of Lagos, 11001 Nigeria.
J Environ Biol. 2009 Sep;30(5 Suppl):835-40.
The microbial quality of materials and final products of a reputable paint industry in Lagos area were analysed. The bacterial contaminants isolated in the paint-products included Bacillus brevis, B. polymyxa, B. laterosporus, Lactobacillus gasseri, L. brevis, Escherichia coli and Proteus mirabilis. The fungal contaminants detected in the paints were mainly Aspergillus niger, A. flavus and Penicillium citrinum. The microbial populations in the raw materials ranged from 1.0 x 10(6) - 9.5 x 10(6) cfu g(-1) for bacteria and between 1.25 x 10(4) and 6.8 x 10(4) cfu g(-1) for fungi while those present in packaging materials ranged from 3.45 x 10(6) - 7.65 x 10(6) cfu g(-1) for bacteria and 2.4 x 10(3) - 2.8 x 10(3) cfu g(-1) for fungi respectively. The bacterial populations in the fresh paint samples monitored every two weeks from the time of production ranged from 1.6 x 10(1) - 4.7 x 10(5) cfu ml(-1) while the fungal populations ranged from 1.0 x 10(1) - 5.5 x 10(3) cfu ml(-1) over a ten-month study period. The optical density at 600 nm increased while transmittance, pH, specific gravity and viscosity of the paint samples decreased over the period suggesting gradual deterioration of the aesthetic qualities of the paint-products with time as indicated by the measured parameters.
对拉各斯地区一家知名涂料行业的原材料和最终产品的微生物质量进行了分析。在涂料产品中分离出的细菌污染物包括短短芽孢杆菌、多粘芽孢杆菌、侧孢芽孢杆菌、加氏乳杆菌、短乳杆菌、大肠杆菌和奇异变形杆菌。涂料中检测到的真菌污染物主要是黑曲霉、黄曲霉和桔青霉。原材料中的微生物数量，细菌为1.0×10(6)-9.5×10(6) cfu g(-1)，真菌为1.25×10(4)-6.8×10(4) cfu g(-1)，而包装材料中的微生物数量，细菌分别为3.45×10(6)-7.65×10(6) cfu g(-1)，真菌为2.4×10(3)-2.8×10(3) cfu g(-1)。从生产时起每两周监测一次的新鲜涂料样品中的细菌数量为1.6×10(1)-4.7×10(5) cfu ml(-1)，而在为期十个月的研究期间，真菌数量为1.0×10(1)-5.5×10(3) cfu ml(-1)。在此期间，600 nm处的光密度增加，而涂料样品的透光率、pH值、比重和粘度下降，这表明所测参数表明涂料产品的美学质量随时间逐渐恶化。
