title: VP7 and VP4 genotypes among rotavirus strains recovered from children with gastroenteritis over a 3-year period in Valencia, Spain.
abstract: Between September 1996 and May 1999, the incidence and distribution of the main human rotavirus G genotypes (VP7 associated: G1-G4) and P genotypes (VP4 associated: P[8], P[4], P[6] and P[9]) among children with rotavirus gastroenteritis were determined using reverse transcription and polymerase chain reaction (RT-PCR)-based genotyping methods. From a total of 145 rotavirus strains examined, we identified the G type in 131 (90.3%) and the P type in 127 (87.5%) of the samples. An overall predominance of genotypes P[8] G1 (42.7%) and P[8] G4 (32.4%) was found during the period of study, with much lower incidence of genotypes P[4] G2 (5.5%) and P[8] G3 (2%). P[6] and P[9] types were not detected, neither were unusual combinations of P and G types. A significant genotypic shift was observed: whereas P[8] G4 was the most prevalent genotype during the first year of the study (60%), the genotype P[8] G1 gradually increased to account for 62.3% of the strains analysed in the following winter season. Mixed G types revealing dual infections G1/G4 and G3/G4 were found at low frequency (2%).
authors.affiliation: Department of Microbiology, Hospital Clínico Universitario, School of Medicine, University of Valencia, Spain. buesa@uv.es
authors.forename: J
authors.initials: J
authors.lastname: Buesa
authors.forename: C O
authors.initials: CO
authors.lastname: de Souza
authors.forename: M
authors.initials: M
authors.lastname: Asensi
authors.forename: C
authors.initials: C
authors.lastname: Martínez
authors.forename: J
authors.initials: J
authors.lastname: Prat
authors.forename: M T
authors.initials: MT
authors.lastname: Gil
mesh_terms: D000208:Acute Disease; D000956:Antigens, Viral; D002213:Capsid / Q000235:genetics*; D036022:Capsid Proteins; D002675:Child, Preschool; D004591:Electrophoresis, Polyacrylamide Gel; D005243:Feces / Q000821:virology; D005759:Gastroenteritis / Q000453:epidemiology / Q000821:virology*; D005838:Genotype; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D011446:Prospective Studies; D012367:RNA, Viral / Q000032:analysis; D012189:Retrospective Studies; D020133:Reverse Transcriptase Polymerase Chain Reaction; D012401:Rotavirus / Q000145:classification / Q000235:genetics* / Q000302:isolation & purification; D012400:Rotavirus Infections / Q000453:epidemiology / Q000821:virology*; D013030:Spain / Q000453:epidemiology
chemical_list: D000956:Antigens, Viral; D036022:Capsid Proteins; D012367:RNA, Viral; C060339:VP4 protein, Rotavirus; C050779:VP7 protein, Rotavirus