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Abstract

Introduction

Group A rotaviruses (RVA) are the leading cause of acute gastroenteritis (AGE) in young children, causing ca 250,000 deaths worldwide, mainly in low-income countries. Two proteins, VP7 (glycoprotein, G genotype) and VP4 (protease-sensitive protein, P genotype), are the basis for the binary RVA nomenclature. Although 36 G types and 51 P types are presently known, most RVA infections in humans worldwide are related to five G/P combinations: G1P[8], G2P[4], G3P[8], G4P[8], G9P[8].

Aim

This study aimed to characterise the RVA strains circulating in Italy in the pre-vaccination era, to define the trends of circulation of genotypes in the Italian paediatric population.

Methods

Between September 2014 and August 2017, after routine screening in hospital by commercial antigen detection kit, 2,202 rotavirus-positive samples were collected in Italy from children hospitalised with AGE; the viruses were genotyped following standard European protocols.

Results

This 3-year study revealed an overall predominance of the G12P[8] genotype (544 of 2,202 cases; 24.70%), followed by G9P[8] (535/2,202; 24.30%), G1P[8] (459/2,202; 20.84%) and G4P[8] (371/2,202; 16.85%). G2P[4] and G3P[8] genotypes were detected at low rates (3.32% and 3.09%, respectively). Mixed infections accounted for 6.49% of cases (143/2,202), uncommon RVA strains for 0.41% of cases (9/2,202).

Conclusions

The emergence of G12P[8] rotavirus in Italy, as in other countries, marks this genotype as the sixth most common human genotype. Continuous surveillance of RVA strains and monitoring of circulating genotypes are important for a better understanding of rotavirus evolution and genotype distribution, particularly regarding strains that may emerge from reassortment events.

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2019-04-11
2024-04-19
http://instance.metastore.ingenta.com/content/10.2807/1560-7917.ES.2019.24.15.1800418
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Group A rotavirus surveillance before vaccine introduction in Italy, September 2014 to August 2017
<p class="citation"> <span>Citation style for this article:</span> <span class="meta-value authors"> <a href="/search?value1=Giovanni+Ianiro&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Ianiro Giovanni</a>, <a href="/search?value1=Roberto+Micolano&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Micolano Roberto</a>, <a href="/search?value1=Ilaria+Di+Bartolo&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Di Bartolo Ilaria</a>, <a href="/search?value1=Gaia+Scavia&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Scavia Gaia</a>, <a href="/search?value1=Marina+Monini&option1=author&noRedirect=true" class="nonDisambigAuthorLink">Monini Marina</a>, <a href="/search?value1=RotaNet-Italy+Study+Group&option1=author&noRedirect=true" class="nonDisambigAuthorLink">RotaNet-Italy Study Group</a></span>. Group A rotavirus surveillance before vaccine introduction in Italy, September 2014 to August 2017. <a href="/content/ecdc">Euro Surveill.</a> 2019;24(15):pii=1800418. <a href="https://doi.org/10.2807/1560-7917.ES.2019.24.15.1800418" title="doi link" target="_blank">https://doi.org/10.2807/1560-7917.ES.2019.24.15.1800418</a> <span class="ES_Article_citation"> <span class="generated">Received</span>: 27 Jul 2018;&nbsp;&nbsp; <span class="generated">Accepted</span>: 28 Jan 2019 </span> </p>
/content/10.2807/1560-7917.ES.2019.24.15.1800418
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