The evolving epidemiology of rotavirus gastroenteritis in central Portugal with modest vaccine coverage

Rotavirus (RV) vaccines have been available on the private market in Portugal since 2006, with an estimated coverage rising from 16 to 42% between 2007 and 2010. To assess trends, surveillance of children presenting with acute gastroenteritis (AG) to a large paediatric emergency service (ES) in the...

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Published inJournal of clinical virology Vol. 56; no. 2; pp. 129 - 134
Main Authors Rodrigues, Fernanda, Iturriza-Gómara, Miren, Marlow, Robin, Gray, Jim, Nawaz, Sameena, Januário, Luís, Finn, Adam
Format Journal Article
LanguageEnglish
Published Amsterdam Elsevier B.V 01.02.2013
Elsevier
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Online AccessGet full text
ISSN1386-6532
1873-5967
1873-5967
DOI10.1016/j.jcv.2012.10.016

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Abstract Rotavirus (RV) vaccines have been available on the private market in Portugal since 2006, with an estimated coverage rising from 16 to 42% between 2007 and 2010. To assess trends, surveillance of children presenting with acute gastroenteritis (AG) to a large paediatric emergency service (ES) in the central region of Portugal was conducted yearly during the winter–spring seasons. Stool samples, collected throughout five epidemic seasons (January–June, 2006 to 2010) from children ≤36 months of age attending the ES with AG, were tested for RV by immunochromatographic rapid test and positive samples were genotyped. A total of 6145 AG cases were identified: 1956 (32%) provided a stool sample (range: 28% in 2008–37% in 2009). The proportion of AG subjects who tested positive for RV fluctuated over the five surveillance seasons (49%, 39%, 25%, 26% and 39%, respectively) as did the distribution of co-circulating RV genotypes. There were no consistent changes in seasonality or age distribution and the proportion of admitted AG subjects who tested RV-positive did not show progressive trends over time. Our results demonstrate fluctuations in RVAG incidence with no clear progressive trends or seasonal RV shifts among our surveillance subjects over five years, in the context of limited rotavirus vaccine coverage. Significant annual changes in genotype distributions were detected. Higher vaccine coverage may be necessary than at present for consistent impact on disease.
AbstractList Abstract Background Rotavirus (RV) vaccines have been available on the private market in Portugal since 2006, with an estimated coverage rising from 16 to 42% between 2007 and 2010. Objectives To assess trends, surveillance of children presenting with acute gastroenteritis (AG) to a large paediatric emergency service (ES) in the central region of Portugal was conducted yearly during the winter–spring seasons. Study design Stool samples, collected throughout five epidemic seasons (January–June, 2006 to 2010) from children ≤36 months of age attending the ES with AG, were tested for RV by immunochromatographic rapid test and positive samples were genotyped. Results A total of 6145 AG cases were identified: 1956 (32%) provided a stool sample (range: 28% in 2008–37% in 2009). The proportion of AG subjects who tested positive for RV fluctuated over the five surveillance seasons (49%, 39%, 25%, 26% and 39%, respectively) as did the distribution of co-circulating RV genotypes. There were no consistent changes in seasonality or age distribution and the proportion of admitted AG subjects who tested RV-positive did not show progressive trends over time. Conclusions Our results demonstrate fluctuations in RVAG incidence with no clear progressive trends or seasonal RV shifts among our surveillance subjects over five years, in the context of limited rotavirus vaccine coverage. Significant annual changes in genotype distributions were detected. Higher vaccine coverage may be necessary than at present for consistent impact on disease.
Rotavirus (RV) vaccines have been available on the private market in Portugal since 2006, with an estimated coverage rising from 16 to 42% between 2007 and 2010.BACKGROUNDRotavirus (RV) vaccines have been available on the private market in Portugal since 2006, with an estimated coverage rising from 16 to 42% between 2007 and 2010.To assess trends, surveillance of children presenting with acute gastroenteritis (AG) to a large paediatric emergency service (ES) in the central region of Portugal was conducted yearly during the winter-spring seasons.OBJECTIVESTo assess trends, surveillance of children presenting with acute gastroenteritis (AG) to a large paediatric emergency service (ES) in the central region of Portugal was conducted yearly during the winter-spring seasons.Stool samples, collected throughout five epidemic seasons (January-June, 2006 to 2010) from children ≤ 36 months of age attending the ES with AG, were tested for RV by immunochromatographic rapid test and positive samples were genotyped.STUDY DESIGNStool samples, collected throughout five epidemic seasons (January-June, 2006 to 2010) from children ≤ 36 months of age attending the ES with AG, were tested for RV by immunochromatographic rapid test and positive samples were genotyped.A total of 6145 AG cases were identified: 1956 (32%) provided a stool sample (range: 28% in 2008-37% in 2009). The proportion of AG subjects who tested positive for RV fluctuated over the five surveillance seasons (49%, 39%, 25%, 26% and 39%, respectively) as did the distribution of co-circulating RV genotypes. There were no consistent changes in seasonality or age distribution and the proportion of admitted AG subjects who tested RV-positive did not show progressive trends over time.RESULTSA total of 6145 AG cases were identified: 1956 (32%) provided a stool sample (range: 28% in 2008-37% in 2009). The proportion of AG subjects who tested positive for RV fluctuated over the five surveillance seasons (49%, 39%, 25%, 26% and 39%, respectively) as did the distribution of co-circulating RV genotypes. There were no consistent changes in seasonality or age distribution and the proportion of admitted AG subjects who tested RV-positive did not show progressive trends over time.Our results demonstrate fluctuations in RVAG incidence with no clear progressive trends or seasonal RV shifts among our surveillance subjects over five years, in the context of limited rotavirus vaccine coverage. Significant annual changes in genotype distributions were detected. Higher vaccine coverage may be necessary than at present for consistent impact on disease.CONCLUSIONSOur results demonstrate fluctuations in RVAG incidence with no clear progressive trends or seasonal RV shifts among our surveillance subjects over five years, in the context of limited rotavirus vaccine coverage. Significant annual changes in genotype distributions were detected. Higher vaccine coverage may be necessary than at present for consistent impact on disease.
Rotavirus (RV) vaccines have been available on the private market in Portugal since 2006, with an estimated coverage rising from 16 to 42% between 2007 and 2010. To assess trends, surveillance of children presenting with acute gastroenteritis (AG) to a large paediatric emergency service (ES) in the central region of Portugal was conducted yearly during the winter–spring seasons. Stool samples, collected throughout five epidemic seasons (January–June, 2006 to 2010) from children ≤36 months of age attending the ES with AG, were tested for RV by immunochromatographic rapid test and positive samples were genotyped. A total of 6145 AG cases were identified: 1956 (32%) provided a stool sample (range: 28% in 2008–37% in 2009). The proportion of AG subjects who tested positive for RV fluctuated over the five surveillance seasons (49%, 39%, 25%, 26% and 39%, respectively) as did the distribution of co-circulating RV genotypes. There were no consistent changes in seasonality or age distribution and the proportion of admitted AG subjects who tested RV-positive did not show progressive trends over time. Our results demonstrate fluctuations in RVAG incidence with no clear progressive trends or seasonal RV shifts among our surveillance subjects over five years, in the context of limited rotavirus vaccine coverage. Significant annual changes in genotype distributions were detected. Higher vaccine coverage may be necessary than at present for consistent impact on disease.
Rotavirus (RV) vaccines have been available on the private market in Portugal since 2006, with an estimated coverage rising from 16 to 42% between 2007 and 2010. To assess trends, surveillance of children presenting with acute gastroenteritis (AG) to a large paediatric emergency service (ES) in the central region of Portugal was conducted yearly during the winter-spring seasons. Stool samples, collected throughout five epidemic seasons (January-June, 2006 to 2010) from children less than or equal to 36 months of age attending the ES with AG, were tested for RV by immunochromatographic rapid test and positive samples were genotyped. A total of 6145 AG cases were identified: 1956 (32%) provided a stool sample (range: 28% in 2008-37% in 2009). The proportion of AG subjects who tested positive for RV fluctuated over the five surveillance seasons (49%, 39%, 25%, 26% and 39%, respectively) as did the distribution of co-circulating RV genotypes. There were no consistent changes in seasonality or age distribution and the proportion of admitted AG subjects who tested RV-positive did not show progressive trends over time. Our results demonstrate fluctuations in RVAG incidence with no clear progressive trends or seasonal RV shifts among our surveillance subjects over five years, in the context of limited rotavirus vaccine coverage. Significant annual changes in genotype distributions were detected. Higher vaccine coverage may be necessary than at present for consistent impact on disease.
Rotavirus (RV) vaccines have been available on the private market in Portugal since 2006, with an estimated coverage rising from 16 to 42% between 2007 and 2010. To assess trends, surveillance of children presenting with acute gastroenteritis (AG) to a large paediatric emergency service (ES) in the central region of Portugal was conducted yearly during the winter-spring seasons. Stool samples, collected throughout five epidemic seasons (January-June, 2006 to 2010) from children ≤ 36 months of age attending the ES with AG, were tested for RV by immunochromatographic rapid test and positive samples were genotyped. A total of 6145 AG cases were identified: 1956 (32%) provided a stool sample (range: 28% in 2008-37% in 2009). The proportion of AG subjects who tested positive for RV fluctuated over the five surveillance seasons (49%, 39%, 25%, 26% and 39%, respectively) as did the distribution of co-circulating RV genotypes. There were no consistent changes in seasonality or age distribution and the proportion of admitted AG subjects who tested RV-positive did not show progressive trends over time. Our results demonstrate fluctuations in RVAG incidence with no clear progressive trends or seasonal RV shifts among our surveillance subjects over five years, in the context of limited rotavirus vaccine coverage. Significant annual changes in genotype distributions were detected. Higher vaccine coverage may be necessary than at present for consistent impact on disease.
Author Gray, Jim
Iturriza-Gómara, Miren
Januário, Luís
Nawaz, Sameena
Marlow, Robin
Finn, Adam
Rodrigues, Fernanda
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Issue 2
Keywords RV
Rotavirus
AG
Immunisation
ES
Genotypes
Acute gastroenteritis
emergency service
rotavirus
acute gastroenteritis
Immunization
Acute
Gastroenteritis
Genotype
Vaccine
Epidemiology
Reoviridae
Virus
Digestive diseases
Intestinal disease
Gastric disease
Language English
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CC BY 4.0
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Snippet Rotavirus (RV) vaccines have been available on the private market in Portugal since 2006, with an estimated coverage rising from 16 to 42% between 2007 and...
Abstract Background Rotavirus (RV) vaccines have been available on the private market in Portugal since 2006, with an estimated coverage rising from 16 to 42%...
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SubjectTerms Acute gastroenteritis
Age
Age composition
Allergy and Immunology
Biological and medical sciences
Child, Preschool
Children
Epidemics
Epidemiology
Feces
Feces - virology
Fundamental and applied biological sciences. Psychology
Gastroenteritis
Gastroenteritis - epidemiology
Genotype
Genotypes
Human viral diseases
Humans
Immunisation
Immunochromatography
Infant
Infant, Newborn
Infectious Disease
Infectious diseases
Medical sciences
Microbiology
Miscellaneous
Molecular Epidemiology
Pediatrics
Portugal - epidemiology
RNA, Viral - genetics
Rotavirus
Rotavirus - classification
Rotavirus - genetics
Rotavirus - isolation & purification
Rotavirus Infections - epidemiology
Rotavirus Infections - virology
Rotavirus Vaccines - administration & dosage
Seasonal variations
Vaccines
Viral diseases
Virology
Title The evolving epidemiology of rotavirus gastroenteritis in central Portugal with modest vaccine coverage
URI https://www.clinicalkey.com/#!/content/1-s2.0-S1386653212003976
https://www.clinicalkey.es/playcontent/1-s2.0-S1386653212003976
https://dx.doi.org/10.1016/j.jcv.2012.10.016
https://www.ncbi.nlm.nih.gov/pubmed/23238239
https://www.proquest.com/docview/1272734795
https://www.proquest.com/docview/1273503951
Volume 56
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