Human norovirus detection in bivalve shellfish in Brazil and evaluation of viral infectivity using PMA treatment.

Abstract:

:Noroviruses are the most common cause of gastroenteritis outbreaks in humans and bivalve shellfish consumption is a recognized route of infection. Our aim was to detect and characterize norovirus in bivalves from a coastal city of Brazil. Nucleic acid was extracted from the bivalve's digestive tissue concentrates using magnetic beads. From March 2018 to June 2019, 77 samples were screened using quantitative RT-PCR. Noroviruses were detected in 41.5%, with the GII being the most prevalent (37.7%). The highest viral load was 3.5 × 106 and 2.5 × 105 GC/g in oysters and mussels, respectively. PMA-treatment demonstrated that a large fraction of the detected norovirus corresponded to non-infectious particles. Genetic characterization showed the circulation of the GII.2[P16] and GII.4[P4] genotypes. Norovirus detection in bivalves reflects the anthropogenic impact on marine environment and serves as an early warning for the food-borne disease outbreaks resulting from the consumption of contaminated molluscs.

journal_name

Mar Pollut Bull

authors

Sarmento SK,Guerra CR,Malta FC,Coutinho R,Miagostovich MP,Fumian TM

doi

10.1016/j.marpolbul.2020.111315

subject

Has Abstract

pub_date

2020-08-01 00:00:00

pages

111315

eissn

0025-326X

issn

1879-3363

pii

S0025-326X(20)30433-1

journal_volume

157

pub_type

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