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Clinical and epidemiological characteristics of norovirus gastroenteritis among hospitalized children in Lebanon

World Journal of Gastroenterology 2016年第48期22卷 10557-10565页

作者： Nada M Melhem Hassan Zaraket Khalil Kreidieh Zeinab Ali Moza Hammadi Soha ghanem Farah Hajar Amjad Haidar Adlette Inati Mariam Rajab Hassan Fakhouri bassam.ghanem.ghassan baasiri ghassan Dbaibo Center for Infectious Diseases Research Faculty of Medicine American University of Beirut Medical Laboratory Sciences Program Faculty of Health Sciences American University of Beirut Department of Experimental Pathology Immunology and Microbiology American University of Beirut Faculty of Medicine Department of Pediatrics and Adolescent Medicine Faculty of Medicine American University of Beirut Medical Center Department of Pediatrics Nini Hospital Department of Pediatrics Makassed General Hospital Department of Pediatrics Rafik Hariri University Hospital Department of Pediatrics Nabatieh Governmental Hospital Department of Pediatrics Hammoud Hospital

AIM To assess the burden of norovirus(No V) and to determine the diversity of circulating strains among hospitalized children in Lebanon. METHODS Stool samples were collected from children presenting with acute gastroenteritis to six major hospitals in Lebanon. A total of 739 eligible stool samples, testing negative for diarrhea caused by rotavirus as a possible viral pathogen, were collected between January 2011 and June 2013. A standardized questionnaire including demographic, epidemiological and clinical observations was used at the time of hospitalization of children presenting with diarrhea. Viral RNA was extracted from stool samples followed by reverse transcription polymerase chain reaction and nucleotide sequencing of a fragment of the viral protein 1 capsid gene. Multiple sequence alignments were carried out and phylogenetic trees were constructed using the MEGA 6 *** Overall, 11.2% of stool samples collected from children aged < 5 years tested positive for No V genogroups Ⅰ(GⅠ) and Ⅱ(GⅡ). GⅡ accounted for 10.6% of the gastroenteritis cases with only five samples being positive for GⅠ(0.7%). The majority of hospitalized children showed symptoms of diarrhea, dehydration, vomiting and fever. Upon sequencing of positive samples and based on their clustering in the phylogenetic tree, 4/5 of GⅠ gastroenteritis cases were designated GⅠ.3 and one case as GⅠ.4. GⅡ.4 was predominantly detected in stool of our study participants(68%). We report a JB-15/KOR/2008 GⅡ.4 Apeldoorn 2008-like variant strain circulating in 2011; this strain was replaced between 2012 and 2013 by a variant sharing homology with the Sydney/NSW0514/2012/AUS GⅡ.4 Sydney 2012 and Sydney 2012/FRA GⅡ.4 strains. We also report the co-circulation of non-GⅡ.4 genotypes among hospitalized children. Our data show that No V gastroenteritis can occur throughout the year with the highest number of cases detected during the hot *** The majority of No V-associated viral gastroenteri

关键词： Norovirus Reverse transcription polymerase chain reaction Sequencing Norovirus genogroup Ⅰ Norovirus genogroup Ⅱ Lebanon

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