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Objective: To establish a selective culture medium screening method for counting viable bacteria from multi-strain microecological preparation based on gene and metabolic pathway analysis, in order to solve the problem of mutual interference in the measurement of counting viable bacteria. Methods: By analyzing the genomic scale metabolic network, the antibiotic sensitivity and resistance of Bacillus cereus, Enterococcus faecalis,Lactobacillus acidophilus, and Bifidobacterium infantis were quickly predicted. Based on the prediction results,suitable types and concentrations of antibiotics with resistance differences among the four microorganisms were screened and added to the culture medium, effectively inhibiting the growth of interfering microorganisms and ensuring accurate and effective counting results. Simultaneously, conventional drug sensitivity experiments results were used to ensure and compare with this method. Results: In the process of viable counting for multi-strain microecological preparation, this method effectively eliminated the interference of Enterococcus faecalis on the counting of Lactobacillus acidophilus live bacteria and the interference of Lactobacillus acidophilus and Enterococcus faecalis on the counting of Bifidobacterium infant, and the counting results were accurate and reliable of each microorganism. Conclusion: The method has strong foresight and specificity. Genomic analysis and metabolic pathway analysis can effectively predict microbial antibiotic resistance, and experimental design based on the predicted results will greatly accelerate experimental efficiency, making the results more predictive and accurate,and has broad application prospects in selective culture medium screening for counting viable bacteria from multi-strain microecological preparation.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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