Abstract：
:To date, there has been no study to establish the genotypic or subgenotypic identities of Cryptosporidium and Giardia in edible shellfish. Here, we explored the genetic composition of these protists in Mytilus galloprovincialis (Mediterranean mussel) purchased from three markets in the city of Foggia, Italy, from May to December 2012. Samples from the digestive glands, gills and haemolymph were tested by nested PCR, targeting DNA regions within the 60 kDa glycoprotein (gp60) gene of Cryptosporidium, and the triose-phosphate isomerase (tpi) and β-giardin genes of Giardia. In total, Cryptosporidium and Giardia were detected in 66.7% of mussels (M. galloprovincialis) tested. Cryptosporidium was detected mostly between May and September 2012. Sequencing of amplicons showed that 60% of mussels contained Cryptosporidium parvum genotype IIa (including subgenotypes A15G2R1, IIaA15G2 and IIaA14G3R1), 23.3% Giardia duodenalis assemblage A, and 6.6% had both genetic types. This is the first report of these types in fresh, edible shellfish, particularly the very commonly consumed M. galloprovincialis from highly frequented fish markets. These genetic types of Cryptosporidium and Giardia are known to infect humans and thus likely to represent a significant public health risk. The poor observance of hygiene rules by vendors, coupled to the large numbers of M. galloprovincialis sold and the eating habits of consumers in Italy, call for more effective sanitary measures pertaining to the selling of fresh shellfish in street markets.
journal_name
Int J Food Microbioljournal_title
International journal of food microbiologyauthors
Giangaspero A,Papini R,Marangi M,Koehler AV,Gasser RBdoi
10.1016/j.ijfoodmicro.2013.11.022subject
Has Abstractpub_date
2014-02-03 00:00:00pages
62-7eissn
0168-1605issn
1879-3460pii
S0168-1605(13)00543-6journal_volume
171pub_type
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