Risk Assessment of Dietary Exposure to Residual Chloramphenicol from Consuming Fresh Aquatic Products from Beibu Gulf, Guangxi
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Abstract:
To investigate the risk of chloramphenicol exposure among Guangxi residents by consuming aquatic products from Beibu Gulf, this study monitored chloramphenicol residues in aquatic products from Beibu Gulf from 2018 to 2020. The chloramphenicol content of various types of aquatic products from Beibu Gulf was analyzed. Margin of exposure (MOE) values were calculated to evaluate exposure probability and risk. In this research, chloramphenicol was detected in 2.69% of samples. Chi-square analyses indicate that chloramphenicol detection rates are significantly correlated with types of aquatic product. The chloramphenicol detection rate in shellfish is 13.33% while that in freshwater fish is merely 0.24%. No chloramphenicol is detected in marine fish point and probability. Assessments demonstrate that dietary exposure to chloramphenicol through consuming aquatic products from Beibu Gulf is extremely low. However, the MOE of the population with exposure above the 50th percentile is below 10000, suggesting some health risks. At all percentiles, the daily exposure from consuming shellfish is one order of magnitude higher than that associated with consumption of other aquatic products. 54.7% of Guangxi residents might experience health risks due to their intake of chloramphenicol in aquatic products from Beibu Gulf. The chloramphenicol content in shellfish exerts the greatest influence on daily exposure, making shellfish the key sensitivity factor (r=0.99). Therefore, the population with higher exposure should limit their consumption of shellfish. Health authorities should more strictly monitor chloramphenicol levels in shellfish from Beibu Gulf, Guangxi.
