PCR-變性梯度凝膠電泳法初探嬰兒期腸道菌群菌種演替
[Abstract]:Objective to explore the colonization rule of intestinal flora in infancy by studying the composition of fecal bacteria in infants. Methods fresh feces were collected from 15 healthy infants at day 0, 2, 2, 4, 7, 10, 14, 28 days after birth. PCR- denaturing gradient gel electrophoresis (DGGE) was used to detect the intestinal flora structure, and the dominant bacteria species were sequenced. The succession process of intestinal flora in infancy was analyzed. Results DGGE fingerprinting showed that the structure of intestinal flora in infancy varied significantly with postnatal time. The results of cloning and sequencing showed that Proteus had the earliest bacterial colonization, mainly of Enterobacter coli, Pseudomonas pseudomonas, followed by specific anaerobes (Clostridium thuringiensis). The microphylum of verruca was colonized and actinomycetes was the most late. Bifidobacterium was the main bacterium and gradually became the dominant flora. Conclusion Infant intestinal specific aerobic bacteria are first colonized, followed by specific anaerobes and facultative anaerobes. Proteus was first colonized, followed by P. thunbergiformis, followed by verruca microphylum, and actinomycetes, which was mainly bifidobacterium, was the last.
【作者單位】: 四川大學(xué)華西公共衛(wèi)生學(xué)院營養(yǎng)與食品衛(wèi)生學(xué)及毒理學(xué)系;河北醫(yī)科大學(xué)公共衛(wèi)生學(xué)院衛(wèi)生檢驗(yàn)教研室;四川大學(xué)華西第二醫(yī)院產(chǎn)科;四川大學(xué)華西公共衛(wèi)生學(xué)院衛(wèi)生檢驗(yàn)與檢疫系;
【分類號(hào)】:R725.7
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