Objective To analyze the cause of a complex food poisoning incident using a combination of non-targeted and targeted methods based on mass spectrometry. Methods Suspected contaminated food and blood samples from the cases were collected. After sample preparation, a high-resolution mass spectrometry non-targeted method was used for toxin screening, and a triple quadrupole mass spectrometry targeted detection method was applied for the quantitative analysis of xylazine in the samples. Results Xylazine was detected in both the suspected contaminated food (raw and fried venison) and the serum samples of 3 cases. The concentrations in raw and fried venison were 3.0 μg/kg and 395.9 μg/kg, while the concentrations in the cases’ serum were 47.0, 16.0 and 15.6 ng/mL, respectively. Conclusion This incident is confirmed as xylazine poisoning caused by venison ingestion. First, through epidemiological investigation, the scope for identifying the cause of poisoning can be quickly determined. The non-targeted method provides accurate evidence for clinical treatment, aiding in the diagnosis and management of such events. At the same time, the targeted quantitative analysis of samples also provides a basis for the formulation of drug use standards in farmed animals in the future.
| 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 |