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中国精品科技期刊2020

健康婴儿粪便样本中加氏乳杆菌的分离鉴定及安全性评价

李国花 赵馨 张明新 马雨哲 张歆怡 钱卫生 鲁曦

李国花,赵馨,张明新,等. 健康婴儿粪便样本中加氏乳杆菌的分离鉴定及安全性评价[J]. 食品工业科技,2023,44(3):1−10. doi:  10.13386/j.issn1002-0306.2022060178
引用本文: 李国花,赵馨,张明新,等. 健康婴儿粪便样本中加氏乳杆菌的分离鉴定及安全性评价[J]. 食品工业科技,2023,44(3):1−10. doi:  10.13386/j.issn1002-0306.2022060178
LI Guohua, ZHAO Xin, ZHANG Mingxin, et al. Isolation, Identification and Safety Evaluation of Lactobacillus gasseri from Fecal Samples of Healthy Infants[J]. Science and Technology of Food Industry, 2023, 44(3): 1−10. (in Chinese with English abstract). doi:  10.13386/j.issn1002-0306.2022060178
Citation: LI Guohua, ZHAO Xin, ZHANG Mingxin, et al. Isolation, Identification and Safety Evaluation of Lactobacillus gasseri from Fecal Samples of Healthy Infants[J]. Science and Technology of Food Industry, 2023, 44(3): 1−10. (in Chinese with English abstract). doi:  10.13386/j.issn1002-0306.2022060178

健康婴儿粪便样本中加氏乳杆菌的分离鉴定及安全性评价

doi: 10.13386/j.issn1002-0306.2022060178
基金项目: 国家自然科学基金(31970115);陕西省重点研发计划(2022NY-030)。
详细信息
    作者简介:

    李国花(1997−),女,硕士研究生,研究方向:益生菌筛选和功能鉴定,E-mail:486806391@qq.com

    通讯作者:

    鲁曦(1983−),男,博士,副教授,研究方向:益生菌筛选与功能鉴定,E-mail:luxi1126@163.com

  • 中图分类号: TS201.3

Isolation, Identification and Safety Evaluation of Lactobacillus gasseri from Fecal Samples of Healthy Infants

  • 摘要: 目的:本研究从125例健康婴儿粪便样本中分离鉴定出加氏乳杆菌(Lactobacillus gasseri)并对其安全性和抑菌性能进行评价。方法:本研究以1月龄健康婴儿粪便样本为对象,经过MRS培养基分离纯化、革兰氏染色、生化鉴定和16S rRNA测序技术进行菌种鉴定;随后,对分离得到的加氏乳杆菌利用血琼脂平板进行溶血性评价;利用微量肉汤稀释法对常见抗生素的药物敏性进行测定,并对加氏乳杆菌的安全性进行评价;最后,采用牛津杯法检测对大肠杆菌ATCC 25922和金黄色葡萄球菌ATCC 25923的抑制作用。结果:从125例健康婴儿粪便样本中成功分离并鉴定出15株加氏乳杆菌。溶血性检测结果显示,14株均无溶血性;待测菌株对四环素、万古霉素、利奈唑胺、利福平敏感性较高,对亚胺培南完全敏感,对甲氧苄啶完全耐药;抑菌实验结果显示,有6株菌同时对大肠杆菌和金黄色葡萄球菌具有抑菌效果。结论:本研究从健康婴儿粪便样本中成功分离筛选出3株安全性较高且对大肠杆菌和金黄色葡萄球菌同时具有一定抑制作用的加氏乳杆菌,编号分别为:LGI 6-1、LGI 6-2、LGI 6-3,作为潜在的益生菌资源,为后续深入探究加氏乳杆菌功能提供研究对象。
  • 图  1  加氏乳杆菌分离、安全性和功能评价流程图

    Figure  1.  Flow chart for isolation, safety and function evaluation of Lactobacillus gasseri

    图  2  15株加氏乳杆菌的菌落形态及革兰氏染色结果

    Figure  2.  Colony morphology and Gram staining results of 15 strains of Lactobacillus gasseri

    图  3  菌株16S rRNA基因序列系统发育树

    Figure  3.  Phylogenetic tree of 16S rRNA gene sequence of strain

    图  4  15株加氏乳杆菌菌株的溶血情况

    Figure  4.  Hemolysis of 15 strains of Lactobacillus gasseri

    图  5  15株加氏乳杆菌对大肠杆菌ATCC 25922的抑菌情况

    Figure  5.  Bacteriostasis of 15 strains of Lactobacillus gasseri against E. coli ATCC 25922

    图  6  15株加氏乳杆菌对金黄色葡萄球菌ATCC 25923的抑制情况

    Figure  6.  Bacteriostasis of 15 strains of Lactobacillus gasseri on Staphylococcus aureus ATCC 25923

    表  1  15株加氏乳杆菌生物学特性结果

    Table  1.   Biological characteristics of 15 strains of Lactobacillus gasseri

    菌种编号形状颜色革兰氏染色七叶苷棉子糖蔗糖麦芽糖纤维二糖水杨苷接触酶明胶液化葡萄糖产酸葡萄糖产气
    L. gasseri LGI6-1杆菌乳白G++++++++
    L. gasseri LGI6-2杆菌乳白G++++++++
    L. gasseri LGI6-3杆菌半透G+++++++
    L. gasseri LGI6-4杆菌乳白G+++++++
    L. gasseri LGI6-5短杆菌乳白G+++++++
    L. gasseri LGI6-6杆菌乳白G+++++++
    L. gasseri LGI6-7杆菌乳白G+++++++
    L. gasseri LGI6-8杆菌乳白G+++++++
    L. gasseri LGI6-9短杆菌乳白G++++++++
    L. gasseri LGI6-10杆菌乳白G+++++++
    L. gasseri LGI6-11杆菌乳白G+++++++
    L. gasseri LGI6-12杆菌乳白G++++++++
    L. gasseri LGI6-13杆菌乳白G++++++++
    L. gasseri LGI6-14杆菌乳白G++++++++
    L. gasseri LGI6-15短杆菌乳白G+++++++
    注:“+”表示阳性;“−”表示阴性;“G+”表示革兰氏染色呈阳性。
    下载: 导出CSV

    表  2  15株加氏乳杆菌的溶血情况表

    Table  2.   Hemolysis of 15 strains of Lactobacillus gasseri

    菌种名称溶血类型(αβγ
    L. gasseri LGI 6-1α
    L. gasseri LGI 6-2α
    L. gasseri LGI 6-3α
    L. gasseri LGI 6-4α
    L. gasseri LGI 6-5γ
    L. gasseri LGI 6-6α
    L. gasseri LGI 6-7γ
    L. gasseri LGI 6-8γ
    L. gasseri LGI 6-9β
    L. gasseri LGI 6-10γ
    L. gasseri LGI 6-11γ
    L. gasseri LGI 6-12γ
    L. gasseri LGI 6-13α
    L. gasseri LGI 6-14α
    L. gasseri LGI 6-15γ
    E. faecalis ATCC 29212γ
    S. aureus ATCC 25923β
    下载: 导出CSV

    表  3  抗菌药物及药物敏感型标准[30]

    Table  3.   Antimicrobial and drug sensitive standards[30]

    抗菌药物类别药物名称MIC值判定标准(μg/mL)质控菌株允许范围
    E. faecalis ATCC 29212)
    SIR
    四环素类四环素≤48≥168~32
    碳青霉烯类亚胺培南≤48≥160.5~2.0
    恶唑烷酮类利奈唑胺≤21~4
    安沙霉素利福平≤12≥40.5~4.0
    糖肽类万古霉素≤21~4
    叶酸代谢途
    径抑制剂
    甲氧苄啶≤2≥40.12~0.5
    下载: 导出CSV

    表  4  15株加氏乳杆菌的MIC值及耐药性

    Table  4.   MIC value and drug resistance of 15 strains of Lactobacillus gasseri

    抗生素类别
    (μg/mL)
    LGI6-1LGI 6-2LGI6-3LGI6-4LGI6-5LGI6-6LGI6-7LGI6-8LGI6-9LGI6-10LGI6-11LGI6-12LGI6-13LGI6-14LGI6-15
    四环素0.5(S)<0.125(S)1(S)<0.125(S)1(S)0.5(S)2(S)<0.125(S)0.125(S)32(R)8(R)0.125(S)0.125(S)0.125(S)0.5(S)
    万古霉素2(S)2(S)2(S)2(S)4(R)4(R)2(S)2(S)2(S)2(S)2(S)2(S)2(S)4(R)2(S)
    利福平2(I)2(I)2(I)2(I)4(R)4(R)2(I)2(I)2(I)2(I)2(I)2(I)4(R)2(I)4(R)
    利奈唑胺2(S)2(S)2(S)4(R)2(S)1(S)4(R)1(S)4(R)1(S)1(S)1(S)1(S)1(S)1(S)
    亚胺培南2(S)2(S)2(S)1(S)2(S)2(S)1(S)2(S)1(S)2(S)2(S)2(S)2(S)2(S)4(S)
    甲氧苄啶>4(R)>4(R)>4(R)>4(R)>4(R)>4(R)>4(R)>4(R)>4(R)>4(R)>4(R)>4(R)>4(R)>4(R)>4(R)
    注:S表示敏感;I表示中敏;R表示耐药。
    下载: 导出CSV

    表  5  15株加氏乳杆菌抑菌圈直径结果(mm)

    Table  5.   Results of bacteriostatic circle diameter of 15 strains of Lactobacillus gasseri (mm)

    菌种名称大肠杆菌
    ATCC 25922
    金黄色葡萄球菌
    ATCC 25923
    L. gasseri LGI 6-110.00±0.1014.20±0.10
    L. gasseri LGI 6-216.15±0.0516.25±0.05
    L. gasseri LGI 6-310.55±0.5014.25±0.05
    L. gasseri LGI 6-415.65±0.1511.70±0.10
    L. gasseri LGI 6-510.07±0.70
    L. gasseri LGI 6-611.55±0.4513.80±0.10
    L. gasseri LGI 6-716.10±0.60
    L. gasseri LGI 6-810.65±0.05
    L. gasseri LGI 6-910.85±1.95
    L. gasseri LGI 6-10
    L. gasseri LGI 6-1115.16±0.30
    L. gasseri LGI 6-12
    L. gasseri LGI 6-13
    L. gasseri LGI 6-1414.60±0.5010.60±0.10
    L. gasseri LGI 6-1510.25±0.15
    注:“−”表示无抑菌圈。
    下载: 导出CSV
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    XIAO Hongde. Experimental study on the replacement of antibiotics in the diet of weaned piglets with probiotics[D]. Wuhan: Huazhong Agricultural University, 2013
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出版历程
  • 收稿日期:  2022-06-20
  • 网络出版日期:  2022-12-14
  • 刊出日期:  2023-01-17

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