HAV is a member of the Picornaviridae family, genus Hepatovirus. The economic burden is significant as recovery can be long and disabling. Healing is current however, in rare cases, it can lead to fulminant hepatitis that progresses to a fatal outcome. This illness is strongly related to age: if it is a mild disease in children under five, protective antibodies bestow lifelong immunity, in older children and adults may have acute inflammation of the liver with icteric symptomatology, though without involving chronic liver disease. Nowadays it is still implicated in several outbreaks around world as 1.4 millions clinical cases occur annually. They belong to a large panel of family and genus and among this diversity, HAV, ranked as priority hazards by WHO/FAO, is known since antiquity to be responsible for many epidemics, causing acute inflammation of the liver. Viral persistense has been demonstrated in bivalve molluscs and as they are often consumed raw or slightly cooked, the microbial risk is therefore increased.Įnteric viruses of human origin are very common in seawater where they are rejected in large amount, shed by infected people. Coastal marine ecosystem is threatened by a wide range of pollutants that filter-feeding molluscs can accumulate in their tissues and are therefore likely to cause a serious risk for consumer’s health. Necessary before their delivery for human consumption.Ĭontaminated shellfishes are frequently involved in foodborne diseases and infections. Viral health surveillance of bivalve molluscs is therefore This RNA was even detected in a sample meeting theīacterial criteria. Of flesh and intravalvular fluid (FIF) is 43%. coli contamination exceeds the threshold of 230 E. (rRT-PCR) according to ISO 15216-2 method. Detection of hepatitis A virus, wasĬarried out by real-time reverse transcriptase polymerase chain reaction Sanitary status ofīivalve molluscs was assessed by E. Sites corresponding to different oyster farms in the lagoon. Samples of oysters ( Crassostrea gigas ) collected monthly between November 2015 and February 2017 from three The correlation between the two parameters. coli ) in oysters from Oualidia lagoon (Moroccan Atlantic coast) and to study The present study aims to evaluate hepatitis A virus (HAV) prevalence andįaecal contamination indicators Escherichia coli ( E.
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