AI Article Synopsis
- The study investigated the presence of Norovirus (NoV) and Hepatitis E virus (HEV) in oysters from the north-west Italian coast, using advanced testing methods.
- Norovirus was consistently found in oysters throughout the sampling period, with higher levels in winter and lower levels in summer, while HEV and marine biotoxins were absent.
- The 24-hour depuration process did not significantly reduce NoV levels, indicating a potential health risk for consumers, especially during the winter and spring months.
Article Abstract
The presence of Norovirus (NoV) and Hepatitis E virus (HEV) in non-depurated and depurated oysters raised in the north-west Italian coast was investigated by quantitative real-time RT-PCR. Total and inorganic arsenic (As) and the presence of marine biotoxins (DSP, ASP, PSP) by LC-MS were also investigated. NoV was detected through all the sampling period in non depurated and depurated oysters with highest levels during wintertime (>10 genome copies per gram, gc/g) and minimum values in summer below the LOQ (<130/140 gc/g). HEV has never been found as well as biotoxins. Total As concentration was found in oysters in the range 0.45-3.0 mg/kg, while inorganic As was found in all samples in concentrations below the LOQ (<0.020 mg/kg). The study highlights how the 24 h depuration process didn't reduce significantly NoV levels and therefore the high concentration of NoV in oysters could represent a risk for consumers especially during winter and spring months.
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| http://dx.doi.org/10.1016/j.marpolbul.2020.111843 | DOI Listing |
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