生物膜
蜡样芽孢杆菌
蜡样体
微生物学
胞外聚合物
结晶紫
孢子
生物
人类病原体
分离(微生物学)
拉伤
细菌
病菌
细胞外
化学
食品科学
生物化学
遗传学
解剖
作者
Mohammad Shakhawat Hussain,Deog‐Hwan Oh
出处
期刊:Journal of Microbiology and Biotechnology
[Journal of Microbiology and Biotechnology]
日期:2018-01-28
卷期号:28 (1): 77-86
被引量:17
标识
DOI:10.4014/jmb.1707.07023
摘要
The human pathogen and food spoiler Bacillus cereus can form biofilms that act as a persistent source of contamination, which is of public health concern. This study aimed to understand how the source of isolation might affect the behavior of biofilm formation. Biofilm formation abilities of 56 strains of B. cereus isolated from different environments, including human food poisoning, farm, and food, were determined. Crystal violet assay results revealed significant (p < 0.05) differences in biofilm formation abilities among the strains isolated from different sources only at an early stage of incubation. However, strain origin showed no impact on later stage of biofilm formation. Next, correlation of the group of isolates on the basis of their biofilm-forming abilities with the number of sessile cells, sporulation, and extracellular polymeric substance (EPS) formation was determined. The number of sessile cells and spores in biofilms was greatly influenced by the groups of isolates that formed dense, moderate, and weak biofilms. The contribution of extracellular DNA and/or proteins to EPS formation was also positively correlated with biofilm formation abilities. Our results that the source of isolation had significant impact on biofilm formation might provide important information to develop strategies to control B. cereus biofilm formation.
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