Brusa T, Ferrari F, Canzi E
Department of Food Science and Microbiology, University of Milan, Italy.
J Basic Microbiol. 1998;38(2):79-84.
Methanogenic bacteria are anaerobic, oxygen-intolerant microorganisms, and it is only by studying the different habitats of such bacteria that fundamental information about their ecology becomes available. This research has evaluated methanogenic bacteria in apparently aerobic ecosystems, in foodstuffs not subjected to chemical-physical reclamation processes, where the presence of methanogenic bacteria has never been investigated. Methanogenic bacteria, ascribable to the Methanogenium, Methanobacterium and Methanosarcina genera, were found in vegetables, meat, fish and cheese but were generally absent in confectionery products and fruit. The microorganisms appear to be chance contaminants, usually being present in only very low numbers. It should be noted that none of the tested foods showed the presence of Methanobrevibacter smithii, M. oralis or Methanosphaera stadtmaneae, methanogenic bacteria sometimes present in the human digestive tract.
产甲烷菌是厌氧、不耐氧的微生物，只有通过研究此类细菌的不同栖息地，才能获得有关其生态学的基本信息。本研究评估了明显有氧生态系统中、未经过化学物理回收处理的食品中的产甲烷菌，此前从未对这些食品中产甲烷菌的存在情况进行过调查。在蔬菜、肉类、鱼类和奶酪中发现了属于产甲烷菌属、甲烷杆菌属和甲烷八叠球菌属的产甲烷菌，但在糖果和水果中通常不存在。这些微生物似乎是偶然污染物，通常数量极少。应当指出的是，所有测试食品中均未发现史密斯甲烷短杆菌、口腔甲烷菌或史氏甲烷球形菌，这些产甲烷菌有时存在于人体消化道中。
