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人体肠道中的细菌数量是人体细胞数量的10倍以上。这些微生物与宿主的营养、代谢、生理机能、和免疫功能密切相关。目前肠道微生物的研究涉及到肝、脑、肺、甲状腺、代谢性疾病及肾脏等各个领域。人体肠道中定植的细菌按照不同生理功能可分为共生菌、条件致病菌和病原菌。共生菌是肠道菌群的主体,其典型代表即常说的益生菌如双歧杆菌、乳酸杆菌等。益生菌在人体
The number of bacteria in the human gut is more than 10 times the number of human cells. These microorganisms are closely related to the host’s nutrition, metabolism, physiology, and immune function. Currently, research on gut microbes involves the liver, brain, lung, thyroid, metabolic diseases and kidneys. Bacteria colonized in the human intestine can be divided into symbiotic bacteria, pathogenic bacteria and pathogenic bacteria according to different physiological functions. Symbiotic bacteria is the main body of intestinal flora, the typical representatives of that is often said probiotics such as Bifidobacteria, Lactobacilli and so on. Probiotics in the human body