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从配方奶喂养和母乳喂养的新生儿中获取双歧杆菌菌株:鉴定、定量并建立抗菌谱。

Acquiring bifidobacteria species from formula-fed and breast-fed newborns: identifying, quantifying and creating an antibiogram.

作者信息

Kammara Rajagopal, Nellikka Anagha

机构信息

Department of Microbiology and Fermentation Technology, Council of Scientific and Industrial Research (CSIR) - Central Food Technological Research Institute (CFTRI), Mysore, Karnataka, India.

出版信息

Access Microbiol. 2023 Aug 8;5(8). doi: 10.1099/acmi.0.000590.v3. eCollection 2023.

Abstract

After examining the spp. population in faeces samples from breast-fed and formula-fed infants, an antibiogram was created. The prevalence of spp. in faeces was determined using common bacterial growth media, including Man Rogos Sharpe (MRS), Brain Heart Infusion (BHI), Luria Bertani (LB) broth and Bifidobacteria agar. According to the findings, formula-fed babies had a low population of spp. in their stools while breast-fed babies had a high population. By using phylogenetic analysis of the 16S rRNA and (xylose/fructose 6-phosphate phosphoketolase) genes, and RFLP mapping of isolates, it was possible to identify a new and unique species. The intensity of the reddish brown colour produced during the F6PPK (fructose 6-phosphate phosphoketolase) assay is an accurate indicator of the proportion of various bifidobacteria present. Bifidobacteria agar media produced the greatest amounts of bifidobacteria diversity and recovery. Small (SCV) and Big colony variations (BCV) were formed during growth on different media. The various antibiotic MIC values changed depending on the use of different media, growth circumstances, bile salt treatment and low pH. The findings of this study demonstrate that test conditions also impact the diversity of microbiological conditions that distinguish between resistant and susceptible bacteria.

摘要

在检查了母乳喂养和配方奶喂养婴儿粪便样本中的 spp. 菌群后,绘制了一份抗菌谱。使用包括曼-罗戈斯-夏普(MRS)、脑心浸液(BHI)、Luria Bertani(LB)肉汤和双歧杆菌琼脂在内的常见细菌生长培养基来测定粪便中 spp. 的流行情况。根据研究结果,配方奶喂养的婴儿粪便中 spp. 菌群数量较低,而母乳喂养的婴儿则数量较高。通过对 16S rRNA 和 (木糖/果糖 6-磷酸磷酸酮醇酶)基因进行系统发育分析,以及对 分离株进行限制性片段长度多态性(RFLP)图谱分析,有可能鉴定出一种新的独特的 物种。在 F6PPK(果糖 6-磷酸磷酸酮醇酶)测定过程中产生的红棕色强度是存在的各种双歧杆菌比例的准确指标。双歧杆菌琼脂培养基产生的双歧杆菌多样性和回收率最高。在不同培养基上生长时形成了小菌落变异(SCV)和大菌落变异(BCV)。各种抗生素的最低抑菌浓度(MIC)值因使用不同培养基、生长环境、胆盐处理和低pH而有所变化。本研究结果表明,测试条件也会影响区分耐药菌和敏感菌的微生物条件的多样性。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/beb7/10484311/8ffdf67cb101/acmi-5-590.v3-g001.jpg

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