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Outline
To investigate the bacterial diversity in Pandanus amaryllifolius powder and analyze the contamination status and antimicrobial resistance of Cronobacter sakazakii.
The 6 samples of Pandanus amaryllifolius powder from different brands were collected from an e-commerce platform. High-throughput 16S rDNA sequencing technology was used to analyze the bacterial diversity. Cronobacter sakazakii was detected in accordance with GB 4789.40—2024 National food safety standard-Food microbiological examination-Cronobacter spp., and its antimicrobial susceptibility was analyzed.
The dominant bacterial phyla in Pandanus amaryllifolius powder were Firmicutes, Proteobacteria and Cyanobacteria. The dominant bacterial genera were Enterobacter, Weissella and Clostridium. The 3 strains of Cronobacter sakazakii were isolated from 2 samples. The antimicrobial susceptibility results showed that these three strains were not sensitive to β-lactam antibiotics (except ertapenem) and nitrofuran antibiotics.
The bacterial flora in Pandanus amaryllifolius powder is relatively abundant with a high content of Enterobacter. The foodborne pathogenic bacterium Cronobacter sakazakii is isolated from the powder and the 3 strains exhibit multidrug resistance. Therefore, vulnerable populations should consume it with caution.
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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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