Search results for "Rotaviru"

High incidence of G9P[8] rotavirus infections in Italian children during the winter season 1999-2000

2002

We report a significant high incidence of infection with G9P[8] rotavirus in Italian children during the winter epidemic season 1999-2000. The study was carried out on 439 children < 4 years hospitalized with acute diarrhea in Palermo. G9P[8] strains constituted 19% of all rotavirus identified and were not associated with more severe forms of gastroenteritis.

Nucleotide variation in the VP7 gene affects PCR genotyping of G9 rotaviruses identified in Italy

2003

A modified (aFT9m) and a degenerate (aFT9d) version of the rotavirus G9-specific primer (aFT9) allowed strains that were previously untypable, because of point mutations accumulating at the primer binding site, to be G typed by reverse transcription-polymerase chain reaction. The strains were collected during 2001-2002 in Italy in hospitals of the Apulia region, from children affected by severe rotavirus-associated enteritis. Using a wide selection of G9 rotaviruses detected worldwide, sequencing of the G9 untypable strains, sequence comparison, and phylogenetic analysis showed that the Italian strains have strong genetic similarity (< or =99.4%) to G9 rotaviruses identified recently in man…

Genomic characterization of a novel group A lamb rotavirus isolated in Zaragoza, Spain.

2008

An ovine rotavirus (OVR) strain, 762, was isolated from a 30-day-old lamb affected with severe gastroenteritis, in Zaragoza, Spain, and the VP4, VP7, VP6, NSP4, and NSP5/NSP6 genes were subsequently characterized molecularly. Strain OVR762 was classified as a P[14] rotavirus, as the VP4 and VP8* trypsin-cleavage product of the VP4 protein revealed the highest amino acid (aa) identity (94% and 97%, respectively) with that of the P11[14] human rotavirus (HRV) strain PA169, isolated in Italy. Analysis of the VP7 gene product revealed that OVR762 possessed G8 serotype specificity, a type common in ruminants, with the highest degree of aa identity (95–98%) shared with serotype G8 HRV, bovine rot…

Electropherotypes, subgroups and serotypes of human rotavirus strains causing gastroenteritis in infants and young children in Palermo, Italy, from 1…

1990

During 1985-89, an epidemiological survey was conducted in Palermo, Sicily (Southern Italy) on group A human rotavirus (HRV) strains which cause gastroenteritis in infants and young children. Two hundred and thirty eight HRV strains were characterized for subgroup and serotype using monoclonal-antibody-based ELISA systems, and for electropherotype using polyacrylamide gel electrophoresis. Subgroup II strains were largely predominant, constituting 218/238 of the positive stool samples (91.6%). Among the serotypes, 192/238 strains (80.7%) were serotype 1 and 16 strains (6.7%) were serotype 4; serotype 2 circulated intermittently and serotype 3 was nearly absent (only one subgroup I strain was…

G2 rotavirus infections in an infantile population of the South of Italy: variability of viral strains over time.

2005

Rotavirus positive samples collected in Palermo, Italy, during 2002–2004 did not react with the G2 type-specific RV5:3 monoclonal antibodies (MAbs) and could be identified as G2 only by RT-PCR genotyping. The genetic variation of VP7 and VP4 antigenic proteins was studied in 14 G2 samples including a selection of both those successfully characterized by serotyping and those failing to be serotyped. The phylogenetic analysis performed on partial VP7 sequences showed a temporal clustering of these strains, with those isolated in Palermo in 2003 belonging to the same lineage of G2 MAbs-unreactive strains identified in UK in 1996–1997 and in Bari, Italy, in 2003–2004. A single amino acid substi…

Electropherotype heterogeneity within serotypes of human rotavirus strains circulating in Italy

1987

Using solid-phase immune electron microscopy, 126 of 129 human rotavirus (HRV) strains could be serotyped directly in stools collected in Italy during the period 1981–1985. Prevalence was 70.5 per cent for serotype 1, and 13.2 per cent for each of serotypes 2 and 4. No serotype 3 strain was detected. In parallel, for 39 of 61 HRV strains tested the electropherotype of genomic RNA was successfully determined. Different electropherotypes were detected among strains of the same serotype, whereas the same electropherotype was found in HRV strains of different serotypes. Serotyping and electropherotyping of HRV strains appear to be complementary to each other, and both should be used in conjunct…

Sorveglianza molecolare delle gastroenteriti da rotavirus in Sicilia

2013

Surveillance of enteric virus infections in a neonatal intensive care unit.

2005

Objective. To investigate the epidemiology of neonatal viral gastroenteritis compared to the circulation of enteric viruses in children, 109 newborns in the NICU of Mother and Child Department and 214 children with enteritis admitted to the “G. Di Cristina” Children’s Hospital in Palermo were monitored for Rotavirus, Adenovirus, Astrovirus and Norovirus infections. Methods. Stool samples were examined by EIA to detect viral antigens. Rotavirus strains were subjected to P- and G-typing. Results. A Norovirus strain was detected in one neonatal stool specimen whereas an astrovirus strain was dectected in two neonatal specimens. No Rotavirus or Adenovirus infection was identified among the newb…

Rotavirus umani ed animali di genotipo G3 responsabili di gastroenterite infantile a Palermo nel 1993-2005.

2008

I rotavirus di gruppo A sono i più frequenti agenti eziologici di gastroenterite virale sia nell’uomo che in numerose specie animali. Per valutare l’evoluzione di tali virus si è rivelato utile effettuare l’analisi di sequenza dei geni codificanti per le proteine del capside esterno VP7 e VP4, per la proteina del capside interno VP6 e per la proteina non strutturale NSP4. Attualmente sono stati descritti in natura: 15 genotipi G in base a VP7, 27 genotipi P in base a VP4, 4 sottogruppi VP6 e 5 genotipi NSP4. I rotavirus umani appartengono più frequentemente ai genotipi G1P[8], G3P[8] e G4P[8], che si associano con il SGII (VP6 correlato) e NSP4B, ovvero al genotipo G2P[4], associato a SGII …

Analisi di costo-efficacia della vaccinazione universale in Italia con il vaccino Rix4414 contro i rotavirus [Cost-effectiveness of universal rotavir…

2008

Objectives: Rotavirus (RV) is the most common etiological agent of gastroenteritis in children. The oral vaccine Rix4414 was recently commercialized in Italy for prevention of RV infections. The health outcomes and the economic impact of a national RV immunization program were assessed. Design: A Markov model simulated the flow of a birth cohort on RV disease burden and costs up to age 5, comparing a RV vaccination programme with no vaccination. Lifetime cost-effectiveness for the national healthcare system (NHS) and the society (S) with a benchmark of 50,000 €/QALY was analysed. Main results: Disease’s medical direct costs exceeded 30 million €/year, while indirect costs approached 112 mil…