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Objective To understand the residue status and exposure levels of 6 kinds of quinolone antibiotics in common freshwater fish and shrimp sold in Beijing. Methods The 90 freshwater fish and shrimp products from 40 supermarkets and farmers’ markets in 9 districts and counties of Beijing were randomly sampled for the determination of 6 kinds of quinolone antibiotics in fish and shrimp meat by liquid chromatography-tandem mass spectrometry. The exposure risk of quinolone antibiotic residues in fish and shrimp to residents of 10 gender/age groups was assessed by the index of food safety (IFS). Results The 4 kinds of quinolone antibiotics were detected in 90 fish and shrimp samples. The detection rate for pefloxacin, ofloxacin, enrofloxacin and ciprofloxacin were 1.11% (1/90), 1.11% (1/90), 26.67% (24/90) and 6.67% (6/90). There were excessive samples of pefloxacin, ofloxacin and enrofloxacin detected, with an exceedance rate of 1.11% (1/90), 1.11% (1/90) and 5.56% (5/90) respectively. Norfloxacin and lomefloxacin were not detected in all samples. The IFS of quinolone antibiotics ranged from 0.040-0.067 in the general-case scenario and from 0.170-0.283 in the worst-case scenario, which was much less than 1. Conclusion The detection of quinolone in freshwater fish and shrimp sold in Beijing is dominated by enrofloxacin and ciprofloxacin, and the health risk of 6 kinds of quinolone antibiotics to human beings is at a safe level in this study, which provides regional data support for the assessment of the quality of aquatic products and the revision of food safety standards.
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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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