Találati lista | Tudóstér

001-es BibID:	BIBFORM057822
Első szerző:	Dóró Renáta
Cím:	Large-scale whole genome sequencing identifies country-wide spread of an emerging G9P[8] rotavirus strain in Hungary, 2012 / Renáta Dóró, Eszter Mihalov-Kovács, Szilvia Marton, Brigitta László, Judit Deák, Ferenc Jakab, Ágnes Juhász, Péter Kisfali, Vito Martella, Béla Melegh, Péter Molnár, Ildikó Sántha, Ferenc Schneider, Krisztián Bányai
Dátum:	2014
ISSN:	1567-1348
Megjegyzések:	With the availability of rotavirus vaccines routine strain surveillance has been launched or continued in many countries worldwide. In this study relevant information is provided from Hungary in order to extend knowledge about circulating rotavirus strains. Direct sequencing of the RT-PCR products obtained by VP7 and VP4 genes specific primer sets was utilized as routine laboratory method. In addition we explored the advantage of random primed RT-PCR and semiconductor sequencing of the whole genome of selected strains. During the study year, 2012, we identified an increase in the prevalence of G9P[8] strains across the country. This genotype combination predominated in seven out of nine study sites (detection rates, 45-83%). In addition to G9P[8]s, epidemiologically major strains included genotypes G1P[8] (34.2%), G2P[4] (13.5%), and G4P[8] (7.4%), whereas unusual and rare strains were G3P[8] (1%), G2P[8] (0.5%), G1P[4] (0.2%), G3P[4] (0.2%), and G3P[9] (0.2%). Whole genome analysis of 125 Hungarian human rotaviruses identified nine major genotype constellations and uncovered both intra- and intergenogroup reassortment events in circulating strains. Intergenogroup reassortment resulted in several unusual genotype constellations, including mono-reassortant G1P[8] and G9P[8] strains whose genotype 1 (Wa-like) backbone gene constellations contained DS1-like NSP2 and VP3 genes, respectively, as well as, a putative bovine-feline G3P[9] reassortant strain. The conserved genomic constellations of epidemiologically major genotypes suggested the clonal spread of the re-emerging G9P[8] genotype and several co-circulating strains (e.g., G1P[8] and G2P[4]) in many study sites during 2012. Of interest, medically important G2P[4] strains carried bovine-like VP1 and VP6 genes in their genotype constellation. No evidence for vaccine associated selection, or, interaction between wild-type and vaccine strains was obtained. In conclusion, this study reports the reemergence of G9P[8] strains across the country and indicates the robustness of whole genome sequencing in routine rotavirus strain surveillance.
Tárgyszavak:	Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban Genotype Rotavirus Surveillance Whole genome sequencing
Megjelenés:	Infection, Genetics and Evolution. - 28 (2014), p. 495-512. -
További szerzők:	Mihalov-Kovács Eszter Marton Szilvia László Brigitta (1983-) (molekuláris biológus, mikrobiológus) Deák Judit (mikrobiológus) Jakab Ferenc Juhász Ágnes Kisfali Péter Martella, Vito Melegh Béla Molnár Péter (Budapest orvos) Sántha Ildikó (Miskolc) Schneider Ferenc Bányai Krisztián (virológus)
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
Borító:
Saját polcon:

001-es BibID:	BIBFORM057820
Első szerző:	Dóró Renáta
Cím:	Review of global rotavirus strain prevalence data from six years post vaccine licensure surveillance : is there evidence of strain selection from vaccine pressure? / Renáta Dóró, Brigitta László, Vito Martella, Eyal Leshem, Jon Gentsch, Umesh Parashar, Krisztián Bányai
Dátum:	2014
Megjegyzések:	Comprehensive reviews of pre licensure rotavirus strain prevalence data indicatedthe global importance of six rotavirus genotypes, G1P[8], G2P[4], G3P[8], G4P[8],G9P[8] and G12P[8]. Since 2006, two vaccines, the monovalent Rotarix (RV1) andthe pentavalent RotaTeq (RV5) have been available in over 100 countriesworldwide. Of these, 60 countries have already introduced either RV1 or RV5 intheir national immunization programs. Post licensure vaccine effectiveness isclosely monitored worldwide. This review aimed at describing the global changesin rotavirus strain prevalence over time. The genotype distribution of the nearly47,000 strains that were characterized during 2007-2012 showed similar picture tothat seen in the preceding period. An intriguing finding was the transientpredominance of heterotypic strains, mainly in countries using RV1. Unusual andnovel antigen combinations continue to emerge, including some causing localoutbreaks, even in vaccinated populations. In addition, vaccine strains have beenfound in both vaccinated infants and their contacts and there is evidence forgenetic interaction between vaccine and wild-type strains. In conclusion, thepost-vaccine introduction strain prevalence data do not show any consistentpattern indicative of selection pressure resulting from vaccine use, although theincreased detection rate of heterotypic G2P[4] strains in some countriesfollowing RV1 vaccination is unusual and this issue requires further monitoring.
Tárgyszavak:	Orvostudományok Elméleti orvostudományok idegen nyelvű folyóiratközlemény külföldi lapban Genotype RotaTeq Rotarix Rotavirus Surveillance
Megjelenés:	Infection Genetics and Evolution. - 28 (2014), p. 446-461. -
További szerzők:	László Brigitta (1983-) (molekuláris biológus, mikrobiológus) Martella, Vito Leshem, Eyal Gentsch, Jon R. Parashar, Umesh D. Bányai Krisztián (virológus)
Internet cím:	DOI Intézményi repozitóriumban (DEA) tárolt változat
Borító:
Saját polcon: