The Predominance of Recombinant Norovirus Gii.4Sydney[P16] Strains in Children Less Than 5 Years of Age With Acute Gastroenteritis in Tehran, Iran, 2021–2022 Publisher Pubmed



Eftekhari M¹ ; Kachooei A^{2, 3} ; Jalilvand S¹ ; Latifi T^{1, 3} ; Habib Z² ; Ataeipirkoohi A² ; Marashi SM¹ ; Shoja Z^{3, 4}
Source: Virus Research Published:2023

Abstract

The present study was aimed to both detect emerging noroviruses and investigate RdRp and VP1-based dual typing of circulating noroviruses in hospitalized children less than 5 years of age with acute gastroenteritis (AGE) in Iran. For this purpose, a total of 200 stool specimens were screened during 2021–2022 by real-time RT-PCR for genogroup I and II (GI and GII) and dual-typed by sequence analysis of PCR products, using a web-based norovirus Typing Tool and phylogenetic analysis. The GI and GII noroviruses were detected in 20% of 200 specimens. The GII.4 norovirus was found to be the most common VP1 genotype (53%) followed by GII.8 (32%), GII.7 (6%), GII.17 (6%), and GII.3 (3%). The GII.P16 norovirus was also found as the predominant RdRp type (53%) followed by GII.P8 (32%), GII.P7 (6%), GII.P17 (6%), and GII.P31 (3%). To our knowledge, this is the first report that highlights the dominancy of recombinant norovirus GII.4Sydney[P16] and newly emerging of norovirus GII.8 [P8], GII.17 [P17] and GII.3 [P16] in Iran. These findings further indicate inter-genotype recombinant strains of noroviruses. © 2023 The Author(s)