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Mamasoula C, Bigirumurame T, Chadwick T, Addor MC, Cavero-Carbonell C, Dias CM, Echevarría-González-de-Garibay LJ, Gatt M, Khoshnood B, Klungsoyr K, Randall K, Stoianova S, Haeusler M, Nelen V, Neville AJ, Perthus I, Pierini A, Bertaut-Nativel B, Rissmann A, Rouget F, Schaub B, Tucker D, Wellesley D, Zymak-Zakutnia N, Barisic I, de Walle HEK, Lanzoni M, Sayers G, Mullaney C, Pennington L, Rankin J. Maternal age and the prevalence of congenital heart defects in Europe, 1995-2015: A register-based study. Birth Defects Res 2023; 115:583-594. [PMID: 36734416 DOI: 10.1002/bdr2.2152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2022] [Revised: 12/18/2022] [Accepted: 01/10/2023] [Indexed: 02/04/2023]
Abstract
BACKGROUND Evidence on the direction and strength of association between maternal age and the prevalence of congenital heart defects (CHD) in different age group categories is conflicting. Some studies have illustrated different trends with an increase in prevalence in younger and older age groups while other studies have reported a linear relationship. Given the increase in maternal age over recent years, it is important to study the CHD prevalence by maternal age. OBJECTIVES To examine the association between maternal age and the prevalence of CHD in Europe between 1995 and 2015 using population-based data from 24 registries belonging to the European Surveillance of Congenital Anomalies (EUROCAT) network. METHODS Associations over time of all nonsyndromic CHD according to maternal age category and for three CHD severity groupings (severity group I: very severe; severity group II: severe; severity group III: less severe) were examined using Bayesian multilevel Poisson regression modeling. Further subgroup analyses were undertaken within four maternal age-bands: ≤24, 25-29, 30-34 and 35-44 years. Descriptive summaries are also presented. RESULTS There were 51,608 nonsyndromic CHD cases in Europe over the 20-year study period. Total prevalence for all CHD combined was increased for younger mothers (≤24 years) and for mothers 35-44 years of age when compared with mothers aged 25-29 years (reference group) (IRR: 1.05, 95% CI: 1.02, 1.07). The total prevalence was increased for severity group I (very severe) only for younger mothers compared to those aged 25-29 years (IRR: 1.14, 95% CI: 1.04, 1.23). We found an increased prevalence of the following CHD subtypes: double outlet right ventricle (IRR:1.33, 95% CI: 1.09, 1.60), hypoplastic left heart syndrome (IRR: 1.18, 95% CI: 1.05, 1.32), hypoplastic right heart syndrome (IRR: 1.41, 95% CI: 1.05, 1.84), atrioventricular septal defect (IRR: 1.15, 95% CI: 1.01, 1.32), coarctation of aorta (IRR: 1.15, 95% CI: 1.03, 1.28) and atrial septal defect (IRR: 1.08, 95% CI: 1.02, 1.13). For older mothers (35-44 years) compared to the reference category, we observed an increased risk in the prevalence for severity group II (IRR: 1.09, 95% CI: 1.03, 1.14), severity group III (IRR: 1.05, 95% CI: 1.01, 1.08) and an increased prevalence of the CHD subtypes: Pulmonary valve stenosis (IRR: 1.22, 95% CI: 1.09, 1.34), ASD (IRR: 1.07, 95% CI: 1.02, 1.13), CoA (IRR: 1.18, 95% CI: 1.06, 1.32) and Tetralogy of Fallot (IRR: 1.14, 95% CI: 1.01, 1.28). Finally, for all age categories compared to the reference category, different associations of ASD and an increased prevalence of CoA was also observed. CONCLUSIONS Based on data for cases of CHD from 24 European population-based registries, evidence of a positive association between maternal age and the total prevalence of CHD for younger (≤24 years old) and older (35-44 years old) mothers was observed. The results suggest that young maternal age (≤24 years old) is a factor associated with severe CHD phenotypes while a positive association between advanced maternal age (35-44 years old) and mild CHD phenotypes was observed.
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Affiliation(s)
| | | | - Thomas Chadwick
- Population Health Sciences Institute, Newcastle University, Newcastle, UK
| | - Marie-Claude Addor
- Department of Woman-Mother-Child, University Medical Center CHUV, Lausanne, Switzerland
| | - Clara Cavero-Carbonell
- Rare Diseases Research Unit, Foundation for the Promotion of Health and Biomedical Research in the Valencian Region, Valencia, Spain
| | - Carlos M Dias
- Population Health Sciences Institute, Newcastle University, Newcastle, UK
- Epidemiology Department, National Institute of Health Doutor Ricardo Jorge, Lisbon, Portugal
| | - Luis-Javier Echevarría-González-de-Garibay
- Ministry of Health of the Basque Government. Directorate for Healthcare Planning, Organisation and Evaluation, Registries and Health Information Unit, Vitoria-Gasteiz, Spain
| | - Miriam Gatt
- Malta Congenital Anomalies Register, Directorate for Health Information and Research, Pietà, Malta
| | - Babak Khoshnood
- Université de Paris, INSERM U1153, CRESS, Obstetrical Perinatal and Pediatric Epidemiology Research Team (EPOPé), Paris, France
| | - Kari Klungsoyr
- Department of Global Public Health and Primary Care, University of Bergen, Bergen, Norway
- Division for Mental and Physical Health, Norwegian Institute of Public Health, Bergen, Norway
| | - Kay Randall
- National Perinatal Epidemiology Unit, Nuffield Department of Population Health, University of Oxford, Oxford, UK
| | - Sylvia Stoianova
- South West Congenital Anomaly Register, Bristol Medical School, University of Bristol, Bristol, UK
| | - Martin Haeusler
- Styrian Malformation Registry, Med. University of Graz, Graz, Austria
| | - Vera Nelen
- Provinciaal Instituut voor Hygiene (PIH), Antwerp, Belgium
| | - Amanda J Neville
- Registro IMER - IMER Registry (Emilia Romagna Registry of Birth Defects), Center for Clinical and Epidemiological Research, University of Ferrara, Ferrara, Italy
| | - Isabelle Perthus
- Auvergne registry of congenital anomalies (CEMC-Auvergne), Department of clinical genetics, Centre de Référence des Maladies Rares, University Hospital of Clermont-Ferrand, Clermont-Ferrand, France
| | - Anna Pierini
- Tuscany Registry of Congenital Defects (RTDC), Institute of Clinical Physiology - National Research Council/ Fondazione Toscana Gabriele Monasterio, Pisa, Italy
| | | | - Anke Rissmann
- Malformation Monitoring Centre Saxony-Anhalt, Medical Faculty Otto-von-Guericke University, Magdeburg, Germany
| | - Florence Rouget
- Brittany Registry of Congenital Anomalies, CHU Rennes, University Rennes, Inserm, EHESP, Irset (Institut de recherche en santé, environnement et travail), Rennes, France
| | - Bruno Schaub
- French West Indies Registry, Registre des Malformations des Antilles (REMALAN), Maison de la Femme de la Mère et de l'Enfant, University Hospital of Martinique, Fort-de-France, France
| | - David Tucker
- CARIS, Public Health Wales, Singleton Hospital, Swansea, UK
| | - Diana Wellesley
- Wessex Clinical Genetics Department, Princess Anne Hospital, Southampton, UK
| | - Natalya Zymak-Zakutnia
- OMNI-Net Ukraine Birth Defects Program and Khmelnytsky City Children's Hospital, Khmelnytsky, Ukraine
| | - Ingeborg Barisic
- Centre of Excellence for Reproductive and Regenerative Medicine, Children's Hospital Zagreb, Medical School University of Zagreb, Zagreb, Croatia
| | - Hermien E K de Walle
- University of Groningen, University Medical Center Groningen, Department of Genetics, Groningen, Netherlands
| | - Monica Lanzoni
- European Commission, Joint Research Centre (JRC), Ispra, Italy
| | - Gerardine Sayers
- Health Service Executive, Dr Steeven's Hospital, Dublin, Ireland
| | - Carmel Mullaney
- Department of Public Health, Service Executive (HSE) South East Area, Limerick, Ireland
| | - Lindsay Pennington
- Population Health Sciences Institute, Newcastle University, Newcastle, UK
| | - Judith Rankin
- Population Health Sciences Institute, Newcastle University, Newcastle, UK
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Bergman JEH, Barišić I, Addor MC, Braz P, Cavero-Carbonell C, Draper ES, Echevarría-González-de-Garibay LJ, Gatt M, Haeusler M, Khoshnood B, Klungsøyr K, Kurinczuk JJ, Latos-Bielenska A, Luyt K, Martin D, Mullaney C, Nelen V, Neville AJ, O'Mahony MT, Perthus I, Pierini A, Randrianaivo H, Rankin J, Rissmann A, Rouget F, Sayers G, Schaub B, Stevens S, Tucker D, Verellen-Dumoulin C, Wiesel A, Gerkes EH, Perraud A, Loane MA, Wellesley D, de Walle HEK. Amniotic band syndrome and limb body wall complex in Europe 1980-2019. Am J Med Genet A 2023; 191:995-1006. [PMID: 36584346 DOI: 10.1002/ajmg.a.63107] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2022] [Revised: 11/29/2022] [Accepted: 12/19/2022] [Indexed: 12/31/2022]
Abstract
Amniotic band syndrome (ABS) and limb body wall complex (LBWC) have an overlapping phenotype of multiple congenital anomalies and their etiology is unknown. We aimed to determine the prevalence of ABS and LBWC in Europe from 1980 to 2019 and to describe the spectrum of congenital anomalies. In addition, we investigated maternal age and multiple birth as possible risk factors for the occurrence of ABS and LBWC. We used data from the European surveillance of congenital anomalies (EUROCAT) network including data from 30 registries over 1980-2019. We included all pregnancy outcomes, including live births, stillbirths, and terminations of pregnancy for fetal anomalies. ABS and LBWC cases were extracted from the central EUROCAT database using coding information responses from the registries. In total, 866 ABS cases and 451 LBWC cases were included in this study. The mean prevalence was 0.53/10,000 births for ABS and 0.34/10,000 births for LBWC during the 40 years. Prevalence of both ABS and LBWC was lower in the 1980s and higher in the United Kingdom. Limb anomalies and neural tube defects were commonly seen in ABS, whereas in LBWC abdominal and thoracic wall defects and limb anomalies were most prevalent. Twinning was confirmed as a risk factor for both ABS and LBWC. This study includes the largest cohort of ABS and LBWC cases ever reported over a large time period using standardized EUROCAT data. Prevalence, clinical characteristics, and the phenotypic spectrum are described, and twinning is confirmed as a risk factor.
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Affiliation(s)
- Jorieke E H Bergman
- Department of Genetics, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Ingeborg Barišić
- Children's Hospital Zagreb, Centre of Excellence for Reproductive and Regenerative Medicine, Medical School University of Zagreb, Zagreb, Croatia
| | - Marie-Claude Addor
- Department of Woman-Mother-Child, University Medical Center CHUV, Lausanne, Switzerland
| | - Paula Braz
- RENAC-Registo Nacional de Anomalias Congénitas, Epidemiology Department, National Institute of Health Doutor Ricardo Jorge, Lisbon, Portugal
| | - Clara Cavero-Carbonell
- Rare Diseases Research Unit, Foundation for the Promotion of the Research in Healthcare and Biomedicine, Valencia, Spain
| | | | | | - Miriam Gatt
- Malta Congenital Anomalies Registry, Directorate for Health Information and Research, G'mangia, Malta
| | - Martin Haeusler
- Department of Obstetrics and Gynaecology, Medical University of Graz, Graz, Austria
| | - Babak Khoshnood
- Université de Paris Cité, Obstetrical Perinatal and Paediatric Epidemiology Research Team (EPOPé), CRESS, INSERM, INRA, Paris, France
| | - Kari Klungsøyr
- Department of Global Public Health and Primary Care, University of Bergen, Bergen, Norway
- Department of Health Promotion, Norwegian Institute of Public Health, Bergen, Norway
| | - Jennifer J Kurinczuk
- National Perinatal Epidemiology Unit, Nuffield Department of Population Health, University of Oxford, Oxford, UK
| | - Anna Latos-Bielenska
- Polish Registry of Congenital Malformations, Department of Medical Genetics, Poznan University of Medical Sciences, Poznan, Poland
| | - Karen Luyt
- South West Congenital Anomaly Register (SWCAR), Bristol Medical School, University of Bristol, Bristol, UK
| | | | - Carmel Mullaney
- Department of Public Health, HSE South East Area, Dublin, Ireland
| | - Vera Nelen
- Provincial Institute of Hygiene, Antwerp, Belgium
| | - Amanda J Neville
- IMER Registry, Centre for Clinical and Epidemiological Research, University of Ferrara and Azienda Ospedaliero Universitario di Ferrara, Ferrara, Italy
| | - Mary T O'Mahony
- Department of Public Health HSE-South, St Finbarr's Hospital, Cork, Ireland
| | - Isabelle Perthus
- Auvergne Registry of Congenital Anomalies (CEMC-Auvergne), Department of Clinical Genetics, Centre de Référence des Maladies Rares, University Hospital of Clermont-Ferrand, Clermont-Ferrand, France
| | - Anna Pierini
- Unit of Epidemiology of Rare Diseases and Congenital Anomalies, Institute of Clinical Physiology, National Research Council, Pisa, Italy
| | - Hanitra Randrianaivo
- Unit of Genetic Medical and Register of Congenital Malformations, CHU St Pierre La Reunion, Réunion, France
| | - Judith Rankin
- South West Congenital Anomaly Register (SWCAR), Bristol Medical School, University of Bristol, Bristol, UK
- Population Health Sciences Institute, Newcastle University, Newcastle upon Tyne, UK
| | - Anke Rissmann
- Malformation Monitoring Centre Saxony-Anhalt, Medical Faculty Otto-von-Guericke University Magdeburg, Magdeburg, Germany
| | - Florence Rouget
- Brittany Registry of Congenital Anomalies, CHU Rennes, Univ Rennes, Inserm, EHESP, Irset (Institut de recherche en santé, environnement et travail), UMR_S 1085, Rennes, France
| | - Gerardine Sayers
- National Health Intelligence Unit, R&D Health Service Executive, Dublin, Ireland
| | - Bruno Schaub
- French West Indies Registry, Registre des Malformations des Antilles (REMALAN), Maison de la Femme de la Mère et de l'Enfant, University Hospital of Martinique, Fort-de-France, France
| | | | - David Tucker
- Congenital Anomaly Register & Information Service for Wales (CARIS), Public Health Wales, Swansea, UK
| | | | - Awi Wiesel
- Births Registry Mainz Model, University of Mainz Medical Center, Mainz, Germany
| | - Erica H Gerkes
- Department of Genetics, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Annie Perraud
- European Commission, Joint Research Centre (JRC), Ispra, Italy
| | - Maria A Loane
- Faculty of Life & Health Sciences, Ulster University, Northern Ireland, UK
| | - Diana Wellesley
- Faculty of Medicine and Wessex Clinical Genetics Service, Princess Anne Hospital, University Hospital Southampton, Southampton, UK
| | - Hermien E K de Walle
- Department of Genetics, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
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Treston B, Petty-Saphon N, Collins A, Murray S, Colgan A, Fitzgerald E, Hassan M, Forde K, O'Farrell A, Sayers G, Linnane N, Franklin O, McMahon C, Leahy TR, Gavin P. Multisystem Inflammatory Syndrome in the Context of Paediatric COVID-19 infection in the Republic of Ireland April 2020 to April 2021. Acta Paediatr 2022; 111:2344-2351. [PMID: 36030064 PMCID: PMC9538218 DOI: 10.1111/apa.16531] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Revised: 08/18/2022] [Accepted: 08/25/2022] [Indexed: 11/29/2022]
Abstract
Aim Our aim was to describe the epidemiology of multisystem inflammatory syndrome in children (MIS‐C) in the Republic of Ireland, in the context of all cases of COVID‐19 in children, during the first year of the SARS‐CoV‐2 pandemic. Methods Cases of MIS‐C were identified by prospective surveillance in Irish hospitals from April 2020 to April 2021. Paediatric COVID‐19 cases and outbreaks in schools or childcare facilities were notified to and routinely investigated by Public Health. Univariate and bivariate analyses were carried out in Excel, Stata and JMP statistical package. Results Fifty‐four MIS‐C cases (median age 7.58 years; males 57%) were identified over the study period. MIS‐C incidence was higher in certain ethnicities (‘black’ 21.3/100,000 [95% CI 4.3–38.4]; and ‘Irish Traveller’ 14.7/100,000 [95% CI −5.7‐35.1]) than those of ‘white’ ethnicity (3.4 /100,000). MIS‐C cases occurred in three temporal clusters, which followed three distinct waves of community COVID‐19 infection, irrespective of school closures. Formal contact tracing identified an epidemiological link with a COVID‐19‐infected family member in the majority of MIS‐C cases (77%). In contrast, investigation of COVID‐19 school outbreaks demonstrated no epidemiological link with MIS‐C cases during the study period. Conclusion Efforts at controlling SARS‐CoV‐2 transmission in the community may be a more effective means to reduce MIS‐C incidence than school closures. Establishing a mandatory reporting structure for MIS‐C will help delineate the role of risk factors such as ethnicity and obesity and the effect of vaccination on MIS‐C incidence.
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Affiliation(s)
- Bryony Treston
- CHI Crumlin and Temple Street, Department of Infectious Diseases and Immunology, Dublin, Ireland
| | | | | | | | - Aoife Colgan
- HSE, Health Protection Surveillance Centre, Dublin, Ireland
| | - Eoin Fitzgerald
- CHI Crumlin and Temple Street, Department of Infectious Diseases and Immunology, Dublin, Ireland
| | - Mahmoud Hassan
- CHI Crumlin and Temple Street, Department of Infectious Diseases and Immunology, Dublin, Ireland
| | - Karina Forde
- CHI Crumlin and Temple Street, Department of Infectious Diseases and Immunology, Dublin, Ireland
| | | | | | - Niall Linnane
- CHI Crumlin and Temple Street, Paediatric Cardiology, Dublin, Ireland
| | - Orla Franklin
- CHI Crumlin and Temple Street, Paediatric Cardiology, Dublin, Ireland
| | - Colin McMahon
- CHI Crumlin and Temple Street, Paediatric Cardiology, Dublin, Ireland
| | - Timothy R Leahy
- CHI Crumlin and Temple Street, Department of Infectious Diseases and Immunology, Dublin, Ireland.,Department of Paediatrics, University of Dublin, Trinity College
| | - Patrick Gavin
- CHI Crumlin and Temple Street, Department of Infectious Diseases and Immunology, Dublin, Ireland
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4
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Morris JK, Addor MC, Ballardini E, Barisic I, Barrachina-Bonet L, Braz P, Cavero-Carbonell C, Den Hond E, Garne E, Gatt M, Haeusler M, Khoshnood B, Lelong N, Kinsner-Ovaskainen A, Kiuru-Kuhlefelt S, Klungsoyr K, Latos-Bielenska A, Limb E, O'Mahony MT, Perthus I, Pierini A, Rankin J, Rissmann A, Rouget F, Sayers G, Sipek A, Stevens S, Tucker D, Verellen-Dumoulin C, de Walle HEK, Wellesley D, Wertelecki W, Bermejo-Sanchez E. Prevention of Neural Tube Defects in Europe: A Public Health Failure. Front Pediatr 2021; 9:647038. [PMID: 34249803 PMCID: PMC8264257 DOI: 10.3389/fped.2021.647038] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Accepted: 05/06/2021] [Indexed: 11/13/2022] Open
Abstract
Objective: Thirty years ago it was demonstrated that folic acid taken before pregnancy and in early pregnancy reduced the risk of a neural tube defect (NTD). Despite Public Health Initiatives across Europe recommending that women take 0.4 mg folic acid before becoming pregnant and during the first trimester, the prevalence of NTD pregnancies has not materially decreased in the EU since 1998, in contrast to the dramatic fall observed in the USA. This study aimed to estimate the number of NTD pregnancies that would have been prevented if flour had been fortified with folic acid in Europe from 1998 as it had been in the USA. Design and Setting: The number of NTD pregnancies from 1998 to 2017 that would have been prevented if folic acid fortification had been implemented in the 28 countries who were members of the European Union in 2019 was predicted was predicted using data on NTD prevalence from 35 EUROCAT congenital anomaly registries and literature searches for population serum folate levels and folic acid supplementation. Results: From 1998 to 2017 an estimated 95,213 NTD pregnancies occurred amongst 104 million births in the 28 countries in the EU, a prevalence of 0.92 per 1,000 births. The median serum folate level in Europe over this time period was estimated to be 14.1 μg/L. There is a lack of information about women taking folic acid supplements before becoming pregnant and during the first trimester of pregnancy, with one meta-analysis indicating that around 25% of women did so. An estimated 14,600 NTD pregnancies may have been prevented if the European countries had implemented fortification at the level adopted by the USA in 1998 and 25% of women took folic acid supplements. An estimated 19,500 NTD pregnancies would have been prevented if no women took folic acid supplements. Conclusions: This study suggests that failure to implement mandatory folic acid fortification in the 28 European countries has caused, and continues to cause, neural tube defects to occur in almost 1,000 pregnancies every year.
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Affiliation(s)
- Joan K Morris
- Population Health Research Institute, St. George's, University of London, London, United Kingdom
| | - Marie-Claude Addor
- Department of Woman-Mother-Child, University Hospital Center, Centre Hospitalier Universitaire Vaudois (CHUV), Lausanne, Switzerland
| | - Elisa Ballardini
- Indagine Sulle Malformazioni Congenite in Emilia-Romagna (IMER) Registry (Emilia Romagna Registry of Birth Defects) Neonatal Intensive Care Unit, Pediatric Section Department of Medical Sciences, University of Ferrara, Ferrara, Italy
| | - Ingeborg Barisic
- Centre of Excellence for Reproductive and Regenerative Medicine, Children's Hospital Zagreb, Medical School University of Zagreb, Zagreb, Croatia
| | - Laia Barrachina-Bonet
- Rare Diseases Research Unit, Foundation for the Promotion of Health and Biomedical Research in the Valencian Region, Valencia, Spain
| | - Paula Braz
- Epidemiology Department, National Institute of Health Doutor Ricardo Jorge, Lisboa, Portugal
| | - Clara Cavero-Carbonell
- Rare Diseases Research Unit, Foundation for the Promotion of Health and Biomedical Research in the Valencian Region, Valencia, Spain
| | - Elly Den Hond
- Health Department, Provincial Institute of Hygiene, Antwerp, Belgium
| | - Ester Garne
- Paediatric Department, Hospital Lillebaelt Kolding, Kolding, Denmark
| | - Miriam Gatt
- Directorate for Health Information and Research, Pietà, Malta
| | - Martin Haeusler
- Department of Obstetrics and Gynaecology, Medical University of Graz, Graz, Austria
| | - Babak Khoshnood
- Université de Paris, Center of Research in Epidemiology and StatisticS/CRESS/Obstetrical Perinatal and Pediatric Epidemiology Research Team (EPOPé), INSERM, INRA, Paris, France
| | - Nathalie Lelong
- Université de Paris, Center of Research in Epidemiology and StatisticS/CRESS/Obstetrical Perinatal and Pediatric Epidemiology Research Team (EPOPé), INSERM, INRA, Paris, France
| | | | - Sonja Kiuru-Kuhlefelt
- Finnish Institute for Health and Welfare Terveyden Ja Hyvinvoinnin Laitos (THL), Register of Congenital Malformations, Helsinki, Finland
| | - Kari Klungsoyr
- Department of Global Public Health and Primary Care, University of Bergen, Bergen, Norway.,Division of Mental and Physical Health, Norwegian Institute of Public Health, Bergen, Norway
| | - Anna Latos-Bielenska
- Department of Medical Genetics, Poznan University of Medical Sciences, Poznan, Poland
| | - Elizabeth Limb
- Population Health Research Institute, St. George's, University of London, London, United Kingdom
| | - Mary T O'Mahony
- Health Service Executive-South, Department of Public Health, St. Finbarr's Hospital, Cork, Ireland
| | - Isabelle Perthus
- Auvergne Registry of Congenital Anomalies (CEMC-Auvergne), Department of Clinical Genetics, Centre de Référence des Maladies Rares, CHU Estaing, Clermont-Ferrand, France
| | - Anna Pierini
- Institute of Clinical Physiology, National Research Council, Pisa, Italy
| | - Judith Rankin
- Population Health Sciences Institute, Newcastle University, Newcastle, United Kingdom
| | - Anke Rissmann
- Malformation Monitoring Centre Saxony-Anhalt, Medical Faculty Otto-von-Guericke-University, Magdeburg, Germany
| | - Florence Rouget
- Brittany Registry of Congenital Anomalies, CHU Rennes, Univ Rennes, INSERM, EHESP, Irset (Institut de recherche en santé, environnement et travail) - UMR_S 1085, Rennes, France
| | - Gerardine Sayers
- Health Intelligence R&D Health Service Executive, Dublin, Ireland
| | - Antonin Sipek
- Department of Medical Biology and Genetics, 1st Faculty of Medicine, General University Hospital, Charles University, Prague, Czechia
| | | | - David Tucker
- Congenital Anomaly Register and Information Service for Wales, Public Health Wales Knowledge Directorate, Singleton Hospital, Swansea, United Kingdom
| | | | - Hermien E K de Walle
- Department of Genetics, Eurocat Northern Netherlands, University of Groningen, University Medical Center Groningen, Groningen, Netherlands
| | - Diana Wellesley
- Wessex Clinical Genetics Service, Princess Anne Hospital, Southampton, United Kingdom
| | | | - Eva Bermejo-Sanchez
- Spanish Collaborative Study of Congenital Malformations (ECEMC), Unidad de Investigación sobre Anomalías Congénitas, Institute of Rare Diseases Research (IIER), Instituto de Salud Carlos III, Madrid, Spain
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5
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Best KE, Rankin J, Dolk H, Loane M, Haeusler M, Nelen V, Verellen‐Dumoulin C, Garne E, Sayers G, Mullaney C, O'Mahony MT, Gatt M, De Walle H, Klungsoyr K, Carolla OM, Cavero‐Carbonell C, Kurinczuk JJ, Draper ES, Tucker D, Wellesley D, Zymak‐Zakutnia N, Lelong N, Khoshnood B. Multilevel analyses of related public health indicators: The European Surveillance of Congenital Anomalies (EUROCAT) Public Health Indicators. Paediatr Perinat Epidemiol 2020; 34:122-129. [PMID: 32101337 PMCID: PMC7064886 DOI: 10.1111/ppe.12655] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Revised: 01/13/2020] [Accepted: 01/21/2020] [Indexed: 01/08/2023]
Abstract
BACKGROUND Public health organisations use public health indicators to guide health policy. Joint analysis of multiple public health indicators can provide a more comprehensive understanding of what they are intended to evaluate. OBJECTIVE To analyse variaitons in the prevalence of congenital anomaly-related perinatal mortality attributable to termination of pregnancy for foetal anomaly (TOPFA) and prenatal diagnosis of congenital anomaly prevalence. METHODS We included 55 363 cases of congenital anomalies notified to 18 EUROCAT registers in 10 countries during 2008-12. Incidence rate ratios (IRR) representing the risk of congenital anomaly-related perinatal mortality according to TOPFA and prenatal diagnosis prevalence were estimated using multilevel Poisson regression with country as a random effect. Between-country variation in congenital anomaly-related perinatal mortality was measured using random effects and compared between the null and adjusted models to estimate the percentage of variation in congenital anomaly-related perinatal mortality accounted for by TOPFA and prenatal diagnosis. RESULTS The risk of congenital anomaly-related perinatal mortality decreased as TOPFA and prenatal diagnosis prevalence increased (IRR 0.79, 95% confidence interval [CI] 0.72, 0.86; and IRR 0.88, 95% CI 0.79, 0.97). Modelling TOPFA and prenatal diagnosis together, the association between congenital anomaly-related perinatal mortality and TOPFA prevalence became stronger (RR 0.70, 95% CI 0.61, 0.81). The prevalence of TOPFA and prenatal diagnosis accounted for 75.5% and 37.7% of the between-country variation in perinatal mortality, respectively. CONCLUSION We demonstrated an approach for analysing inter-linked public health indicators. In this example, as TOPFA and prenatal diagnosis of congenital anomaly prevalence decreased, the risk of congenital anomaly-related perinatal mortality increased. Much of the between-country variation in congenital anomaly-related perinatal mortality was accounted for by TOPFA, with a smaller proportion accounted for by prenatal diagnosis.
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Affiliation(s)
- Kate E. Best
- Institute of Health & SocietyNewcastle UniversityNewcastle upon TyneUK
| | - Judith Rankin
- Institute of Health & SocietyNewcastle UniversityNewcastle upon TyneUK
| | - Helen Dolk
- Centre for Maternal, Fetal and Infant ResearchInstitute of Nursing and Health ResearchUlster UniversityUlsterUK
| | - Maria Loane
- Centre for Maternal, Fetal and Infant ResearchInstitute of Nursing and Health ResearchUlster UniversityUlsterUK
| | | | - Vera Nelen
- Provinciaal Instituut voor HygiëneAntwerpBelgium
| | | | - Ester Garne
- Paediatric DepartmentHospital LillebaeltKoldingDenmark
| | | | - Carmel Mullaney
- Public Health DepartmentHSE Southeast areaLackenKilkennyIreland
| | - Mary T. O'Mahony
- Department of Public HealthHealth Service Executive SouthCorkIreland
| | - Miriam Gatt
- Department of Health Information and ResearchGuardamangiaMalta
| | - Hermien De Walle
- Department of GeneticsUniversity Medical Center GroningenUniversity of GroningenGroningenThe Netherlands
| | - Kari Klungsoyr
- Department of Global Public Health and Primary CareUniversity of BergenBergenNorway
| | | | - Clara Cavero‐Carbonell
- Rare Diseases Research UnitFoundation for the Promotion of Health and Biomedical Research of the Valencian RegionValenciaSpain
| | - Jennifer J. Kurinczuk
- National Perinatal Epidemiology UnitNuffield Department of Population HealthUniversity of OxfordOxfordUK
| | | | - David Tucker
- Congenital Anomaly Register and Information Service for WalesPublic Health WalesSwanseaUK
| | - Diana Wellesley
- Faculty of MedicineUniversity of Southampton and Wessex Clinical Genetics ServiceSouthamptonUK
| | | | - Nathalie Lelong
- INSERM U1153 (Obstetrical, Perinatal and Pediatric Epidemiology Research Team, Center for Biostatistics and Epidemiology)Maternité Port RoyalParisFrance
| | - Babak Khoshnood
- INSERM U1153 (Obstetrical, Perinatal and Pediatric Epidemiology Research Team, Center for Biostatistics and Epidemiology)Maternité Port RoyalParisFrance
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6
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Basit I, Crowley D, Geary M, Kirkham C, Mc Dermott R, Cafferkey M, Sayers G. Awareness and Preventative Behaviours Regarding Toxoplasma, Listeria and Cytomegalovirus Among Pregnant Women. Ir Med J 2019; 112:947. [PMID: 31535836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Aim Infection with toxoplasma, listeria and cytomegalovirus (CMV) infections can negatively affect pregnancy outcomes. Awareness of these infections, knowledge of preventive practices and pertinent behaviours was assessed. Methods A survey of patients at antenatal clinics in a Dublin maternity hospital was conducted over a six month period. Analysis was undertaken using SPSS. Results The response rate was 36% (287/800). One in two respondents were aware of toxoplasma, one in four of Listeria but only 1 in 10 of CMV. Overall, knowledge was highest among older, more educated pregnant women. Nativity had a significant effect on knowledge and behaviour, but increasing parity did not. However the majority practised key safe behaviours. Conclusion Information must be conveyed to pregnant women in a user friendly format and in a culturally sensitive way.
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Affiliation(s)
- I Basit
- Rotunda Hospital, Dublin 01 P5W9
| | - D Crowley
- Department of Public Health East, Health Service Executive, Dr Steeven’s Hospital, Dublin 08 W2A8
| | - M Geary
- Rotunda Hospital, Dublin 01 P5W9
| | | | - R Mc Dermott
- Department of Public Health East, Health Service Executive, Dr Steeven’s Hospital, Dublin 08 W2A8
| | - M Cafferkey
- Rotunda Hospital, Dublin 01 P5W9
- Department of Clinical Microbiology, Royal College of Surgeons in Ireland, Dublin 02 VN51
| | - G Sayers
- Health Intelligence, Strategic Planning and Transformation, Health Service Executive, Dr Steevens Hospital, Dublin 08 W2A8
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7
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Sayers G, Donohue F, McKeown D, Mc Dermott R, Cianci F, Darker CD, Haase T, Johnson H. Analysis of low birth weight first-born babies by geography and deprivation as an aid to policy and service targeting. J Public Health (Oxf) 2019; 42:e66-e73. [DOI: 10.1093/pubmed/fdz035] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Revised: 02/16/2019] [Accepted: 03/20/2019] [Indexed: 12/31/2022] Open
Affiliation(s)
- G Sayers
- Health Intelligence Unit, Strategic Planning and Transformation, HSE, Dr. Steevens Hospital, Dublin D08 W2A8, Ireland
| | - F Donohue
- Health Intelligence Unit, Strategic Planning and Transformation, HSE, Dr. Steevens Hospital, Dublin D08 W2A8, Ireland
| | - D McKeown
- Health Intelligence Unit, Strategic Planning and Transformation, HSE, Dr. Steevens Hospital, Dublin D08 W2A8, Ireland
| | - R Mc Dermott
- Health Intelligence Unit, Strategic Planning and Transformation, HSE, Dr. Steevens Hospital, Dublin D08 W2A8, Ireland
| | - F Cianci
- Health Intelligence Unit, Strategic Planning and Transformation, HSE, Dr. Steevens Hospital, Dublin D08 W2A8, Ireland
| | - C D Darker
- Department of Public Health & Primary Care, Institute of Population Health, School of Medicine, Trinity College Dublin, Russell Centre, Tallaght Cross, Dublin D24 DH74, Ireland
| | - T Haase
- Pobal, Holbrook House, Holles Street, Dublin D02 EY84, Ireland
| | - H Johnson
- Health Intelligence Unit, Strategic Planning and Transformation, HSE, Dr. Steevens Hospital, Dublin D08 W2A8, Ireland
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8
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Johnson H, O'Farrell A, McKeown D, Sayers G, Hayes C, Beaton D. Is Increasing Life Expectancy Leading To More Complexity? Ir Med J 2018; 111:672. [PMID: 29869853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Life expectancy is increasing in Ireland, but whether this has resulted in healthier life years among the elderly and its impact (if any) on hospital services is unknown. The purpose of the study was to use routinely available data to explore the relationship of age and indicators of clinical complexity in acute hospitals over ten years. The study included all in-patients aged 65+ years from the Hospital In-Patient Enquiry (HIPE) discharged between 2005 and 2014. Indicators of complexity included the Charlson index, overall length of stay (LOS), intensive care unit LOS and deaths in hospital, analysed by the major clinical classification software (CCS). Over the period, the number and rate of admissions increased, especially among those aged 85+. Indicators of patient complexity increased and LOS decreased. In-hospital mortality decreased from 5.9% to 4.7%. Hospitals appear to be managing the emergency care of the older and more complex patient more efficiently and with better outcomes.
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Affiliation(s)
- H Johnson
- Health Intelligence Unit, Health and Wellbeing Directorate, HSE, Dublin 8
| | - A O'Farrell
- Health Intelligence Unit, Health and Wellbeing Directorate, HSE, Dublin 8
| | - D McKeown
- Health Intelligence Unit, Health and Wellbeing Directorate, HSE, Dublin 8
| | - G Sayers
- Health Intelligence Unit, Health and Wellbeing Directorate, HSE, Dublin 8
| | - C Hayes
- Discipline of Public Health and Primary Care Institute of Population Health, TCD, Russell Building, Tallaght Cross, Dublin 24
| | - D Beaton
- Health Intelligence Unit, Health and Wellbeing Directorate, HSE, Dublin 8
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9
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Nicolay N, McDermott R, Kelly M, Gorby M, Prendergast T, Tuite G, Coughlan S, McKeown P, Sayers G. Potential role of asymptomatic kitchen food handlers during a food-borne outbreak of norovirus infection, Dublin, Ireland, March 2009. Euro Surveill 2011; 16:19931. [PMID: 21813080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023] Open
Affiliation(s)
- N Nicolay
- Health Protection Surveillance Centre, Dublin, Ireland.
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10
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Nicolay N, McDermott R, Kelly M, Gorby M, Prendergast T, Tuite G, Coughlan S, McKeown P, Sayers G. Potential role of asymptomatic kitchen food handlers during a food-borne outbreak of norovirus infection, Dublin, Ireland, March 2009. Euro Surveill 2011. [DOI: 10.2807/ese.16.30.19931-en] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Binary file ES_Abstracts_Final_ECDC.txt matches
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Affiliation(s)
- N Nicolay
- European Programme for Intervention Epidemiology Training (EPIET), European Centre for Disease Prevention and Control (ECDC), Stockholm, Sweden
- Health Protection Surveillance Centre, Dublin, Ireland
| | - R McDermott
- Department of Public Health, Health Service Executive, Dublin, Ireland
| | - M Kelly
- Environmental Health Office, Health Service Executive, Dublin, Ireland
| | - M Gorby
- Environmental Health Office, Health Service Executive, Dublin, Ireland
| | - T Prendergast
- Environmental Health Office, Health Service Executive, Dublin, Ireland
| | - G Tuite
- National Virus Reference Laboratory (NVRL), Dublin, Ireland
| | - S Coughlan
- National Virus Reference Laboratory (NVRL), Dublin, Ireland
| | - P McKeown
- Health Protection Surveillance Centre, Dublin, Ireland
| | - G Sayers
- Department of Public Health, Health Service Executive, Dublin, Ireland
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11
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McGill I, Feltrer Y, Jeffs C, Sayers G, Marshall RN, Peirce MA, Stidworthy MF, Pocknell A, Sainsbury AW. Isosporoid coccidiosis in translocated cirl buntings (Emberiza cirlus
). Vet Rec 2010; 167:656-60. [DOI: 10.1136/vr.c5179] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- I. McGill
- Institute of Zoology; Zoological Society of London; Regent's Park London NW1 4RY
| | - Y. Feltrer
- Institute of Zoology; Zoological Society of London; Regent's Park London NW1 4RY
| | - C. Jeffs
- Royal Society for the Protection of Birds, South West Regional Office; Keble House, Southernhay Gardens Exeter EX1 1NT
| | - G. Sayers
- Paignton Zoo Environmental Park; Totnes Road Paignton Devon TQ4 7EU
| | - R. N. Marshall
- Veterinary Laboratories Agency - Weybridge; Woodham Lane, New Haw Addlestone Surrey KT15 3NB
| | - M. A. Peirce
- MP International Consultancy; 6 Normandale House, Normandale Bexhill-on-Sea East Sussex TN39 3NZ
| | - M. F. Stidworthy
- International Zoo Veterinary Group; Keighley Business Centre; South Street Keighley West Yorkshire BD21 1AG
| | - A. Pocknell
- Institute of Zoology; Zoological Society of London; Regent's Park London NW1 4RY
| | - A. W. Sainsbury
- Institute of Zoology; Zoological Society of London; Regent's Park London NW1 4RY
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12
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O'Regan K, Marsden P, Sayers G, Morrissey M, Hegarty H, Allen M, O'Connor OJ, Malone D, Maher MM. Videoconferencing of a National Program for Residents on Evidence-Based Practice: Early Performance Evaluation. J Am Coll Radiol 2010; 7:138-45. [DOI: 10.1016/j.jacr.2009.09.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2009] [Accepted: 09/01/2009] [Indexed: 11/25/2022]
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13
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Haçariz O, Sayers G, Flynn RJ, Lejeune A, Mulcahy G. IL-10 and TGF-beta1 are associated with variations in fluke burdens following experimental fasciolosis in sheep. Parasite Immunol 2009; 31:613-22. [PMID: 19751473 DOI: 10.1111/j.1365-3024.2009.01135.x] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Infection with Fasciola hepatica causes an economically important disease in ruminants. Variability in parasite load may indicate innate differences in the host immune system. This study aimed to investigate the immunological mechanisms that are associated with variability in parasite burden following experimental F. hepatica infection in cross-bred sheep. Of a total of 16 animals, four were randomly chosen as uninfected controls, and the remainder infected with 100 viable metacercariae. Uninfected animals were used as the control group for evaluation of cytokine gene expression levels. For comparative analysis, specific animals were selected on the basis of extremes of fluke burdens, and were categorised into light (n = 4) and heavy burdened (n = 3) cohorts. Serum antibody levels, haematological parameters, and expression of IL-4 and IFN-gamma genes in hepatic lymph nodes were equivalent in both groups. However, significant differences in mitogen-specific lymphocyte proliferation in vitro and in expression of TGF-beta1 and IL-10 genes in hepatic lymph nodes were observed at acute and chronic phases of infection, respectively. These results provide useful information in developing further understanding of natural resistance to fasciolosis in sheep.
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Affiliation(s)
- O Haçariz
- Veterinary Sciences Centre, School of Agriculture, Food Science and Veterinary Medicine, College of Life Sciences, University College Dublin, Dublin, Ireland.
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14
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Sayers G. Blood disorders in the elderly. Age Ageing 2009. [DOI: 10.1093/ageing/afp191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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15
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Stear MJ, Belch A, Donskow-Schmelter K, Fitton LA, Innocent GT, Ishikane C, Mateus A, Murphy L, Rennie K, Smith A, Sayers G. Detection of genes with moderate effects on disease resistance using ovine mhc and resistance to nematodes as an example. Vet Immunol Immunopathol 2007; 120:3-9. [PMID: 17765323 DOI: 10.1016/j.vetimm.2007.07.012] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Detecting some of the genes that influence disease resistance would improve our understanding of the processes that cause disease and also simplify disease control. Genes within the major histocompatibility complex (mhc) are strong candidates for disease resistance and they have been intensely studied for the last 30 years. Recently, several groups working independently have reported the existence of alleles within the mhc that are associated with enhanced resistance to nematode infection. This article uses hindsight to describe some of the potential pitfalls that hinder the search for valid disease resistance genes. The search requires a good understanding of disease biology, molecular genetics, statistical genetics and especially, the design and analysis of experiments. The power to detect mhc effects is quite low and is quite sensitive to the frequency of the putative resistance alleles.
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Affiliation(s)
- M J Stear
- Veterinary Genes and Proteins Group, Division of Animal Health and Production, Institute of Comparative Medicine, University of Glasgow, Bearsden Road, Glasgow G61 1QH, UK
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16
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Sayers G, Good B, Hanrahan JP, O'Donovan J, Mulcahy G, Sweeney T. Breed differences in mucosal and systemic antibody response to nematode infection in sheep: an important role for IgE? Parasitology 2007; 135:71-80. [PMID: 17903317 DOI: 10.1017/s0031182007003630] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
SUMMARYThis study compared the immunological and biochemical responses of co-grazed Suffolk and Texel lambs to a natural gastrointestinal nematode infection. Variables analysed included serum pepsinogen, total protein, albumin, haematological variables and nematode-specific serum immunoglobulin activity, at 11, 14 and 17 weeks of age. At 17 weeks, randomly selected lambs were necropsied to determine worm burdens, nematode-specific mucosal abomasal and intestinal immunoglobulin activity. Nematode burden, faecal egg count and pepsinogen concentrations were significantly higher in Suffolks relative to Texels, at all 3 time-points investigated. Suffolks displayed significantly higher erythrocyte, total leukocyte, lymphocyte and neutrophil counts, mean cell volume and packed cell volume, than Texels (P<0·01). However, breed differences in eosinophil counts were not significant. While serum nematode-specific antibody activity levels were significantly higher (P<0·001) in Texels for all isotypes measured, antibody activity levels at a mucosal level were equivalent in both breeds. Correlation analysis of mucosal antibody levels and nematode variables highlighted a more consistent pattern of events in Texels, with more mucosal antibodies negatively correlated with FEC and worm burden, in comparison to Suffolks. In particular, an important role for mucosal IgE is proposed. In Texels, a significant and negative correlation was identified between IgE and faecal egg counts and worm burden (FEC: −0·48, P<0·005). This was not observed in Suffolks. The evidence suggests that susceptibility in Suffolks may be mediated through poor IgE affinity/avidity and/or through deficiencies in related mechanisms such as mast cell production, recruitment or activation.
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Affiliation(s)
- G Sayers
- School of Agriculture, Food Science and Veterinary Medicine, UCD, Belfield Dublin 4, Ireland
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17
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Sayers G, Dooley S, Staines A, Lane J, Thornton L, Staines M, Brennan S, Kelly P, Finlay F. Hepatitis A antibody prevalence among people with an intellectual disability in Ireland. Euro Surveill 2007. [DOI: 10.2807/esm.12.01.00675-en] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
This manuscript aims to determine the prevalence of antibody to and risk factors for hepatitis A virus (HAV) in individuals attending three intellectual disability services through a cross-sectional survey held in Dublin, Ireland. Participants were 636 individuals aged four to 78 years attending three intellectual disability services. The main outcome measure was the measurement of anti-HAV (IgG antibody) in oral fluid swabs using an antibody capture enzyme immunoassay (EIA) technique. Risk factor information was obtained by questionnaire from the individual’s medical record.
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Affiliation(s)
- G Sayers
- Department of Public Health, Health Service Executive Eastern Region, Dublin, Ireland
| | - S Dooley
- National Virus Reference Laboratory, Dublin, Ireland
| | - A Staines
- UCD School of Public Health and Population Science, University College Dublin, Ireland
| | - J Lane
- St Michael’s House Service, Dublin, Ireland
| | - L Thornton
- Health Protection Surveillance Centre, Dublin, Ireland
| | - M Staines
- Stewarts Hospital Services Ltd, Dublin, Ireland
| | - S Brennan
- St Michael's House Service, Dublin, Ireland
| | - P Kelly
- Peamount Hospital, Dublin, Ireland
| | - F Finlay
- Inclusion Ireland,Dublin, Ireland
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18
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Sayers G, McCarthy T, O'Connell M, O'Leary M, O'Brien D, Cafferkey M, McNamara E. Haemolytic uraemic syndrome associated with interfamilial spread of E. coli O26:H11. Epidemiol Infect 2006; 134:724-8. [PMID: 16371176 PMCID: PMC2870445 DOI: 10.1017/s0950268805005455] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/09/2005] [Indexed: 11/06/2022] Open
Abstract
In September 2000, haemolytic uraemic syndrome (HUS) was diagnosed in a 10-month-old child with a prodromal history of vomiting and diarrhoea (non-bloody). Investigation revealed that a self-limiting gastrointestinal illness (mean duration 48 h) had occurred among immediate and extended family in the 2 weeks prior to the child's admission. The epidemiology of the illness suggested person-to-person spread. Five children (close family contacts) had E. coli O26 verocytotoxin (VT1 and VT2) isolated from stools. Stool culture and serology from the index case were negative for shiga toxin-producing E. coli (STEC) organisms. Control measures in accordance with the Public Health Laboratory Service (PHLS), verocytotoxogenic organisms (VTEC) guidelines were applied to prevent further spread among the extended family and contacts. Despite detailed food and environmental exposure histories, the source of the illness was not identified. This incident highlights the importance of investigation of cases of post-diarrhoeal HUS, for potential shiga toxin E. coli aetiology.
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Affiliation(s)
- G Sayers
- Department of Public Health, Health Service Executive Eastern Region, Dublin.
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19
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Affiliation(s)
- D F Twomey
- Veterinary Laboratories Agency-Starcross, Staplake Mount, Starcross, Exeter EX6 8PE
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20
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Johnson H, Staines A, Boran G, Sayers G, Keogh JAB, O'Herlihy B. Uranium in Drinking Water the Baltinglass Study. Am J Epidemiol 2006. [DOI: 10.1093/aje/163.suppl_11.s122-a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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21
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Affiliation(s)
- M Asakawa
- Laboratory of Parasitology (Wildlife Zoology), School of Veterinary Medicine, Rakuno Gakuen University, Ebetsu, Hokkaido 069-8501, Japan
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22
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Abstract
Efforts to curb production losses caused by nematode parasitism in sheep have led to the development of a number of control methods to complement or replace anthelmintics. The need for alternative control measures stems from the emergence of anthelmintic-resistant parasitic nematodes with reports of multi-class resistance to these drugs now emerging. A number of these control methods such as predacious microfungi, protein supplementation, plant extracts in feed and vaccines have demonstrated potential to control infection but require development and examination under natural conditions. Breeding for natural resistance to nematode infection has already shown success in controlling the disease under natural conditions. Selection for resistance is currently based on fecal egg count measurements but identification of genetic indicators of resistance will provide a more efficient method of selection. Current quantitative trait loci for nematode resistance include the MHC genes, interferon gamma gene, IgE gene and microsatellites on chromosome 1, 5 and 6. This paper reviews the current alternatives to anthelmintics to control infection, with an emphasis on breeding for host resistance and identification of genetic indicators of resistance.
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Affiliation(s)
- G Sayers
- School of Agriculture, Food Science and Veterinary Medicine & Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Ireland.
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23
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Sayers G, Good B, Hanrahan JP, Ryan M, Sweeney T. Intron 1 of the interferon γ gene: Its role in nematode resistance in Suffolk and Texel sheep breeds. Res Vet Sci 2005; 79:191-6. [PMID: 16054889 DOI: 10.1016/j.rvsc.2004.12.002] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2004] [Revised: 12/16/2004] [Accepted: 12/16/2004] [Indexed: 11/22/2022]
Abstract
Genetic variation at intron 1 of the interferon gamma gene has recently been associated with variation in faecal egg count in Romney, Merino and Soay breeds of sheep. The Texel breed is more resistant to gastrointestinal nematode infection than the Suffolk breed, based on faecal egg count. Hence, the objective of this experiment was to characterise the polymorphisms of intron 1 of the interferon gammagene in Suffolk and Texel sheep, and to determine if the characterised haplotype variants were associated with faecal egg count variation in these breeds. Intron 1 haplotypes and faecal egg measurements were determined for Suffolks (n=113) and Texels (n=135). Four haplotypes were identified in Suffolks (A, B, C and D), two haplotypes as previously described, and two previously unknown haplotypes. However, there was no association between interferon gamma intron 1 haplotype and faecal egg count in Suffolks. In contrast, two previously identified haplotypes (A and B) were present in the Texel breed, and the B haplotype was associated with resistance to nematode infection (P=0.02). These results suggest that intron 1 of the interferon gamma gene has an important role in resistance to nematode infection in the Texel breed.
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Affiliation(s)
- G Sayers
- Department of Animal Husbandry and Production, Faculty of Veterinary Medicine, University College Dublin (UCD), Belfield, Dublin 4, Ireland
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24
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Murray-Lillibridge K, Barry J, Reagan S, O'flanagan D, Sayers G, Bergin C, Keenan E, O'briain S, Plunkett P, McMahon G, Keane C, O'sullivan P, Igoe D, Mullen L, Ward M, Smith A, Fischer M. Epidemiological findings and medical, legal, and public health challenges of an investigation of severe soft tissue infections and deaths among injecting drug users -- Ireland, 2000. Epidemiol Infect 2005; 134:894-901. [PMID: 16316497 PMCID: PMC2870441 DOI: 10.1017/s0950268805005418] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/19/2005] [Indexed: 11/05/2022] Open
Abstract
In May 2000, public health authorities in Dublin, Ireland, identified a cluster of unexplained severe illness among injecting drug users (IDUs). Similar clusters were also reported in Scotland and England. Concurrent investigations were undertaken to identify the aetiology and source of the illnesses. In Dublin, 22 IDUs were identified with injection-site inflammation resulting in hospitalization or death; eight (36%) died. Common clinical findings among patients with severe systemic symptoms included leukaemoid reaction and cardiogenic shock. Seventeen (77%) patients reported injecting heroin intramuscularly in the 2 weeks before illness. Of 11 patients with adequate specimens available for testing, two (18%) were positive by 16S rDNA PCR for Clostridium novyi. Clinical and laboratory findings suggested that histotoxic Clostridia caused a subset of infections in these related clusters. Empiric treatment for infections among IDUs was optimized for anaerobic organisms, and outreach led to increased enrolment in methadone treatment in Dublin. Many unique legal, medical, and public health challenges were encountered during the investigation of this outbreak.
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25
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Sayers G, Good B, Hanrahan JP, Ryan M, Angles JM, Sweeney T. Major histocompatibility complex DRB1 gene: its role in nematode resistance in Suffolk and Texel sheep breeds. Parasitology 2005; 131:403-9. [PMID: 16178362 DOI: 10.1017/s0031182005007778] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
A potential control strategy for nematode infection in sheep is the implementation of a breeding programme to select for genes associated with resistance. The Texel breed is more resistant to gastrointestinal nematode infection than the Suffolk breed, based on faecal egg count, and this difference should enable the identification of some of the genes responsible for resistance. The objective of this study was to determine if variation at the ovine MHC-DRB1 locus was associated with variation in faecal egg count in Suffolk and Texel sheep. Ovar-DRB1 alleles and faecal egg count were determined for Texel (n = 105) and Suffolk (n = 71) lambs. Eight Ovar-DRB1 alleles, including 1 previously unknown allele, were identified in the Texel breed by sequence-base-typing. Seven Ovar-DRB1 alleles were identified in the Suffolk breed. Two Ovar-DRB1 alleles were common to both breeds, but were among the least frequent in the Suffolk population. In the Suffolk breed 1 Ovar-DRB1 allele was associated with a decrease in faecal egg count and 2 alleles with an increase in faecal egg count. This locus accounted for 14% of the natural variation in faecal egg count in Suffolks. There was no evidence for an association between Ovar-DRB1 alleles and faecal egg count in the Texel breed and the Ovar-DRB1 locus accounted for only 3% of the phenotypic variation in faecal egg count. These results suggest that the Ovar-DRB1 gene plays an important role in resistance to nematode infection in the Suffolk breed. The difference in faecal egg counts between these breeds may be attributable in part to the different allele profile at the Ovar-DRB1 locus.
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Affiliation(s)
- G Sayers
- Department of Animal Husbandry and Production, Faculty of Veterinary Medicine, UCD, Dublin 4
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Ward M, Hutton J, Mc Donnell R, Bachir N, Scallan E, O'Leary M, Hoey J, Doyle A, Delany V, Sayers G. Folic acid supplements to prevent neural tube defects: trends in East of Ireland 1996-2002. Ir Med J 2004; 97:274-6. [PMID: 15568585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/01/2023]
Abstract
Promotion of folic acid to prevent neural Tube Defects (NTD) has been ongoing for ten years in Ireland, without a concomitant reduction in the total birth prevalence of NTD. The effectiveness of folic acid promotion as the sole means of primary prevention of NTD is therefore questionable. We examined trends in folic acid knowledge and peri-conceptional use from 1996-2002 with the aim of assessing the value of this approach. From 1996-2002, 300 women attending ante-natal clinics in Dublin hospitals annually were surveyed regarding their knowledge and use of folic acid. During the period the proportion who had heard of folic acid rose from 54% to 94% between 1996 and 2002 (c2 test for trend: p<0.001). Knowledge that folic acid can prevent NTD also rose from 21% to 66% (c2 test for trend: p<0.001). Although the proportion who took folic acid during pregnancy increased from 14% to 83% from 1996 to 2002 (c2 test for trend: p<0.001), peri-conceptional intake did not rise above 24% in any year. There is a high awareness of folic acid and its relation to NTD, which is not matched by peri-conceptional uptake. The main barrier to peri-conceptional uptake is the lack of pregnancy planning. To date promotional campaigns appear to have been ineffective in reducing the prevalence of NTD in Ireland. Consequently, fortification of staple foodstuffs is the only practical and reliable means of primary prevention of NTD.
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Affiliation(s)
- M Ward
- Department of Public Health, Eastern Regional Health Authority, Dr. Steeven's Hospital, Dublin 8, Republic of Ireland
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Boland M, Sayers G, Coleman T, Bergin C, Sheehan N, Creamer E, O'Connell M, Jones L, Zochowski W. A cluster of leptospirosis cases in canoeists following a competition on the River Liffey. Epidemiol Infect 2004; 132:195-200. [PMID: 15061493 PMCID: PMC2870094 DOI: 10.1017/s0950268803001596] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
On 6 November 2001, a possible case of leptospirosis was notified in a canoeist following a white-water event on the River Liffey. It emerged that a second race participant was also a possible case. An outbreak control team coordinated the epidemiological investigation, laboratory investigation, environmental assessment, communication and control measures. A cluster of six laboratory-confirmed cases of leptospirosis, serologically Leptospira interrogans serogroup Icterohaemorrhagiae was found. The attack rate was 9.2% (6/65). Fever, chills, red eyes and shortness of breath were significantly associated with being a confirmed case. Five cases were hospitalized. Swallowing more than one mouthful of water was associated with an increased risk of developing leptospirosis. Increased rainfall and release of hydroelectric water may have contributed to this outbreak. A multidisciplinary approach and use of the Internet and e-mail facilitated rapid and effective communication.
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Affiliation(s)
- M Boland
- Department of Public Health, Eastern Regional Health Authority, Dublin
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Twomey DF, Higgins RJ, Sayers G. Toxoplasmosis in a western grey kangaroo in the UK. Vet Rec 2002; 151:711. [PMID: 12503792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
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29
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Sayers G, Condon M, La Harpe D, Connell J, Dooley S. Hepatitis A outbreak in an institution. Ir Med J 1999; 92:396-8. [PMID: 10598420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/14/2023]
Abstract
In February 1996, four serologically confirmed cases of hepatitis A virus (HAV) occurred in one household. Investigation showed that the source was a family member with sub-clinical HAV who attended a Unit for Learning Disabilities. Reports of two further cases in the institution followed and control measures were instigated. Contacts were unwilling to accept human normal immunoglobulin (HNIG). Following salivary antibody and serological testing, hepatitis A vaccine was offered to the non-immune. An investigation found that sub-clinical infection was significantly associated with being less than 5 years old (RR = 6.07, p < 0.005) and being in one particular classroom (RR = 6.21, p < 0.0005). None of the staff in the institution became infected. In all, 31 cases of hepatitis A (18 clinical and 13 subclinical cases) occurred. This paper (a) describes an outbreak of hepatitis A (b) refers to the use of a salivary antibody test (assay performance to be published elsewhere) (c) identifies factors associated with the acquisition of HAV and (d) endeavours to assess the effectiveness of the vaccine to contain the outbreak.
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Affiliation(s)
- G Sayers
- Eastern Health Board, Dr Steevens Hospital, Dublin 8
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Abstract
BACKGROUND Although recommendations on folic acid use were issued by health authorities in a number of countries in the early 1990s, uptake of peri-conceptional folic acid is still disappointingly low. Regardless of food fortification policies, folic acid promotion will probably be required in most countries to optimize folate levels among women of child-bearing age. The aim of this study was to examine folic acid knowledge and use, and their determinants among antenatal women in the east of Ireland in 1997. METHODS Three hundred antenatal women attending their initial booking appointment in three Dublin maternity hospitals were surveyed. An interviewer-administered questionnaire was used with questions on folic acid knowledge and use, and demographic and obstetric questions. A univariate analysis of data was undertaken followed by a multivariate analysis using logistic regression to determine factors predicting knowledge and use of folic acid. RESULTS Seventy-six per cent of respondents had heard of folic acid, 16 per cent had taken it before pregnancy and 51 per cent during pregnancy. Women who had planned their pregnancy, were married and were relatively affluent were significantly more likely to have heard of folic acid, to know that it could prevent neural tube defects and to have taken it peri-conceptionally. Less affluent women tended to use their general practitioner (GP) more as a source of information and advice than those who were better off. In multivariate analysis, marriage and planned pregnancy were important predictors of folic acid knowledge whereas planned pregnancy advice given before pregnancy and relative affluence were predictive of peri-conceptional use. CONCLUSIONS Many women know of folic acid but do not take it peri-conceptionally. Women may associate folic acid with pregnancy and less with pre-pregnancy. Greater emphasis on peri-conceptional use should improve folic acid uptake. Focusing on less affluent women for folic acid promotion by GPs and other primary care professionals is also important.
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Affiliation(s)
- R McDonnell
- Health Information Unit, Eastern Health Board, Dr Steeven's Hospital, Dublin, Republic of Ireland
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McDonnell R, Johnson Z, Doyle A, Sayers G. Folic acid knowledge and use among expectant mothers in 1997: a comparison with 1996. IRISH MEDICAL JOURNAL 1999; 92:296-9. [PMID: 10394755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
Abstract
This study examined changes in folic acid knowledge and use among antenatal women in Dublin maternity hospitals between 1996 and 1997, following a campaign to improve the very low uptake of peri-conceptional folic acid. The results showed significant improvements between the two years. Almost 76% of respondents had heard of folic acid in 1997 compared with 54% in 1996 (p < 0.01), with a shift in the proportion of people hearing of folic acid from hospital doctors to general practitioners (GP). Almost 43% of respondents in 1997 knew that folic acid can prevent spina bifida compared with 21% in 1996 (p < 0.01). A higher proportion was taking folic acid prior to conception in 1997 (16% vs 6%, p < 0.01). We conclude that the improvements may have been in part due to the promotional campaign among health professionals, women's groups and the media. However, less than a fifth of women were taking folic acid peri-conceptionally in 1997 and there is still scope for much improvement.
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Affiliation(s)
- R McDonnell
- Health Information Unit Eastern Health Board, Dr. Steeven's Hospital, Dublin.
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Sayers G, Scallan E, McDonnell R, Johnson Z. Knowledge and use of peri-conceptional folic acid among antenatal patients. Ir Med J 1997; 90:236-8. [PMID: 9611928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Peri-conceptional folic acid can prevent more than half of all neural tube defects (NTDs). A cross-sectional interviewer administered study was undertaken among 300 women attending their first antenatal appointment in the three major Dublin maternity hospitals. The aim of the study was to monitor knowledge and behaviour with respect to peri-conceptional folic acid among antenatal patients. There was a 98% (295/300) response rate. 53.6% (158/295) had heard of folic acid. Such knowledge was significantly associated with age over 30 years (p < 0.001), a planned pregnancy (p < 0.001) and being married (p < 0.001). The majority (58.2%) found out about folic acid from lay sources such as friends or the media. One eighth (12.9%, 38/295) had been advised to take folic acid before pregnancy, the majority (58.3%, 21/38) having been advised by doctors. 21% (62/295) knew that it prevented spina bifida. 5.8% (17/295) had taken it before becoming pregnant. Taking folic acid before pregnancy was significantly associated with having a planned pregnancy (p < 0.005) and being married (p < 0.005). This study highlights the poor impact of health promotion campaigns to date and provides a challenge to health professionals.
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Affiliation(s)
- G Sayers
- Health Information Unit, Eastern Health Board, Dr Steeven's Hospital, Dublin
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Abstract
The objective of this survey was to obtain an indication of the size of the methicillin-resistant Staphylococcus aureus (MRSA) problem in Ireland prior to introducing national MRSA control guidelines. A survey of all microbiology laboratories in Ireland was carried out over two weeks in Spring 1995. For patients from whom MRSA was isolated during the study period standard demographic and clinical data were requested and period prevalence/1000 discharges was calculated. All 45 microbiology laboratories surveyed responded. MRSA was isolated from 448 patients during the two-week period. The period prevalence of MRSA was 16.5/1000 discharges. Males aged > or = 65 had the highest rate (50/1000 discharges). Half of all isolates were from patients in surgical or medical wards, but 4% were from community-based sources such as GPs, nursing homes and hospices. Thirty-two percent of MRSA patients were infected rather than colonized. MRSA is clearly a significant problem in Ireland. While it is largely a hospital problem at present, the increasing trend towards day procedures and shorter hospital stay means that infection will increase in the community.
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Affiliation(s)
- Z Johnson
- Health Information Unit, Eastern Health Board, Dublin, Ireland
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Abstract
This is a descriptive study of carers of dependent elderly in inner city Dublin, outlining their awareness, use of and satisfaction with day services. A striking finding from this work, consistent with other studies, is the heavy burden of care which is shouldered by informal carers which should be acknowledged by society. The study highlights a) that levels of use of domiciliary care by carers appear to be very low, b) that there is some evidence of targeting of domiciliary services to the more dependent elderly, c) that day centres and clubs are popular and acceptable to a minority of carers, d) that many carers have no informal help, e) where informal help is available, relatives of carers play a very important role in facilitating carers to accept formal domiciliary care. Recommendations include, a) improving the level and range of provision of domiciliary care, b) alerting professionals such as general practitioners and public health nurses to their role as informant and facilitator of formal care to carers, c) formulating a plan to encourage uptake of domiciliary services by carers, d) review of care provided in day centres.
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Affiliation(s)
- S Jennings
- Eastern Health Board, Dublin, Leicestershire Health Authority, London
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Abstract
The study objectives were to establish the prevalence of breast feeding at birth, at four and twelve weeks after birth and describe the factors associated with its initiation and duration. The study population consisted of all babies born in May 1993 (n = 162) to mothers resident in Kildare. The response rate was 145/162 (89 percent). Mothers were visited within fourteen days of the birth. Breast feeding mothers were re-visited when the baby was four to six weeks old and at twelve to fourteen weeks. Interviews were conducted using an interviewer administered questionnaire. Fifty-five mothers (38%) chose to breast feed at birth. Twelve (8%) had stopped by the first, ten (7%) by the second and fourteen (10%) by the third visit. Higher social class and maternal grandmother having breast fed were significantly associated with initiation (p < 0.05 and p < 0.0005 respectively). Smokers and non-working mothers were significantly less likely to breast feed and smokers had a significantly shorter duration of breast feeding but these associations disappeared on social class adjustment.
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Affiliation(s)
- G Sayers
- Eastern Health Board, Naas, Co. Kildare
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Sayers G. An alternative to QALYs: saved young life equivalent (SAVE). BMJ 1992; 305:1365-6. [PMID: 1483094 PMCID: PMC1883896 DOI: 10.1136/bmj.305.6865.1365-c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Abstract
A novel morphological feature is described in a patient with myeloma and associated amyloidosis: characteristic clustering (satellitism) of neoplastic plasma cells around macrophages in bone marrow aspirates. Although described in myeloma cell culture, as far as is known, this is the first description of this phenomenon in a patient. This unique association may partly explain the origin of amyloid deposition in tissues and organs.
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Affiliation(s)
- T S Pillay
- University of Cape Town Leukaemia Centre, South Africa
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38
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Selkirk ME, Nielsen L, Kelly C, Partono F, Sayers G, Maizels RM. Identification, synthesis and immunogenicity of cuticular collagens from the filarial nematodes Brugia malayi and Brugia pahangi. Mol Biochem Parasitol 1989; 32:229-46. [PMID: 2927447 DOI: 10.1016/0166-6851(89)90073-x] [Citation(s) in RCA: 59] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The major structural proteins of the cuticle of the filarial nematode parasites Brugia malayi and Brugia pahangi were identified by extrinsic iodination and sensitivity to clostridial collagenase. At least 16 acidic components were identified in adult worms by 2-dimensional electrophoresis, with molecular weights ranging from 35,000 to 160,000. These proteins appear to be cross-linked by disulphide bonds, and localised in the basal and inner cortical layers of the cuticle. The outer cortex, containing the epicuticle, is insoluble in 1% sodium dodecyl sulphate and 5% 2-mercaptoethanol, and can be isolated free of cellular material. Despite their inaccessibility to the immune system in intact worms, antibodies to the cuticular collagens are provoked in humans infected with a variety of filarial parasites. Immunological cross-reactivity was demonstrated between a 35 kDa component and human type IV (basement membrane) collagen. Autoantibodies to type IV collagen were detected in a number of individuals with lymphatic filariasis, although no correlation could be drawn with observed pathology. Synthesis of cuticular collagens is discontinuous, occurs at negligible levels in mature adult male worms, and does not appear to involve the production of small molecular weight precursors, in contrast to Caenorhabditis elegans. Hybridisation with a heterologous cDNA probe coding for the alpha 2 chain of chicken type 1 collagen suggests that they are encoded by a multigene family.
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Affiliation(s)
- M E Selkirk
- Department of Biochemistry, Imperial College of Science, Technology and Medicine, London, U.K
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Howard MK, Sayers G, Miles MA. Leishmania donovani metacyclic promastigotes: transformation in vitro, lectin agglutination, complement resistance, and infectivity. Exp Parasitol 1987; 64:147-56. [PMID: 3653336 DOI: 10.1016/0014-4894(87)90138-x] [Citation(s) in RCA: 66] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Freshly transformed Leishmania donovani amastigotes from hamster spleen were used to establish axenic cultures at high density in a modified Grace's medium, which was only partly replenished when cultures were fed. Small, free-swimming, highly active stationary phase promastigotes with a short cell body and long flagellum were induced in this medium. The freshly transformed stationary phase promastigotes so induced were less able to bind peanut agglutinin, had more than 40-fold increased resistance to killing by normal human serum, and 15-fold increased infectivity both in vivo and in vitro when compared to freshly transformed logarithmic phase or long term culture promastigotes. These short form promastigotes may correspond to the metacyclic promastigote forms in the sand fly vector.
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Affiliation(s)
- M K Howard
- Wolfson Molecular Biology Unit, London School of Hygiene and Tropical Medicine, United Kingdom
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Abstract
The patients we are concerned about in tropical medicine are unfortunately affected by a wide range of conditions, not only those seen and studied extensively in the West, such as cancer, cardiovascular diseases and viral or bacterial infections, but also the major protozoan and metazoan conditions – the parasitic diseases. It is with this spectrum of pathophysiological changes that occurs in this last group that we are presently concerned and this communication is intended to present an overview of the subject.
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Wozencraft AO, Sayers G, Blackwell JM. Macrophage type 3 complement receptors mediate serum-independent binding of Leishmania donovani. Detection of macrophage-derived complement on the parasite surface by immunoelectron microscopy. J Exp Med 1986; 164:1332-7. [PMID: 3531384 PMCID: PMC2188422 DOI: 10.1084/jem.164.4.1332] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
In this study, direct visual evidence for local opsonization of L. donovani by macrophage (M phi)-derived complement components was obtained using immunoelectron microscopy. C3 deposition was detected on the surface of both promastigotes and amastigotes after 20 min serum-free incubation with murine resident peritoneal M phi (RPM), followed by fixation and incubation first with specific antibody directed against C3 and then with gold-labelled protein A. Gold deposition was not observed around either form of the parasite if the anti-C3 antibody was omitted. For promastigotes, the degree of C3 deposition under serum-free conditions was comparable with that observed in the presence of an exogenous (serum) source of C3, but did not result in the same severe damage to the parasite as did the latter. Addition of sodium salicyl hydroxamate, which prevents covalent binding of C3 to activator surfaces, abrogated promastigote binding. Hence, although the anti-C3 antibody did not distinguish between native C3 and its breakdown product iC3b, these data support our earlier conclusion that promastigote binding to the CR3 of murine RPM is complement dependent. For amastigotes, gold deposition and binding to murine RPM were not eliminated by sodium salicyl hydroxamate. The presence of normal mouse serum resulted in increased gold deposition, but did not mediate either enhanced binding to M phi or damage to the amastigote. These data suggest that a proportion of C3 binding to the amastigote surface may be via noncovalent linkages, and that the C3 bound may not be in the correct form to mediate binding to CR3.
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Wozencraft AO, Croft SL, Sayers G. Oxygen radical release by adherent cell populations during the initial stages of a lethal rodent malarial infection. Immunology 1985; 56:523-31. [PMID: 3000927 PMCID: PMC1453744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
A series of experiments was carried out to assess the levels of reactive oxygen intermediates (ROI) released by macrophages and monocytes during an acute malarial infection, and to consider the importance of oxidant-induced parasite killing in host protection. Adherent cell populations were removed from the peritoneum and spleen of BALB/c and B10/D2/n mice between Days 0-5 of a Plasmodium yoelii nigeriensis infection. These cell populations were quantified, characterized and their ROI-releasing capacity was measured by following ferricytochrome c reduction upon stimulation with phorbol myristate acetate (PMA). Both strains of mice displayed higher numbers of macrophages and macrophage precursors as the infection progressed; this rise was more marked and accompanied by splenomegaly in BALB/c mice. A concurrent decrease in peritoneal cell numbers was observed. Splenic adherent cell populations released much lower levels of ROI than peritoneal macrophages upon triggering. The levels of ROI released from BALB/c splenic adherent cells rose gradually until Day 3, when the parasitaemia was slightly decreased. In contrast, splenic populations from B10 mice had a decreased capacity to release ROI, particularly after Day 3, when the parasitaemia rose sharply. In further studies, electron microscopy was used to detect H2O2 release during the in vitro interaction of peritoneal macrophages and parasitized erythrocytes. Cerium chloride staining techniques demonstrated that H2O production was not dependent on phagocytosis or the presence of immune serum, although levels were increased by the presence of the latter.
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Abstract
The sheath and cuticle of microfilariae of Brugia pahangi were examined by electron microscopy and the presence of various proteins, carbohydrate and enzymes sought. The epicuticle of microfilariae consists of a pentalaminate structure (24.0 +/- 1.4 nm), a cortex (13.7 +/- 3.6 nm) and a basal zone (27.8 +/- 4.8 nm) which is often banded in appearance. The pentalaminate layers are not continuous at the base of the interannular grooves. The sheath and the epicuticle of B. pahangi stained positively with concanavalin A and saccharated iron oxide. The sheath of approximately 50% of microfilariae showed activity for acid phosphatase, 5' nucleotidase and peroxidase, but not for ATPases, alkaline phosphatase or esterase. No enzymes were detected in the epicuticle although the cortex and basal layers of the cuticle did show enzymic activity. Structures beneath the cuticle in the main body of the worms contained considerable enzymic activity. Microfilariae directly isolated from the blood of infected cats were found by immunochemical means to carry serum proteins on their sheaths but not on their cuticles. These studies extend the definition of the outer structures of microfilariae and confirm that they significantly differ in morphology and enzyme content from typical mammalian cell membranes.
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Sayers G, Hanzmann E, Bodanszky M. Hypothalamic peptides influencing secretion of ACTH by isolated adenohypophysial cells; two corticotrophin releasing factors and a potentiator. FEBS Lett 1980; 116:236-8. [PMID: 6250886 DOI: 10.1016/0014-5793(80)80652-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Sayers G. Bioassay of ACTH using isolated cortex cells. Applications: structure activity relationship for ACTH and analogues, assay of corticotropin-releasing factor, and assay of plasma ACTH. Ann N Y Acad Sci 1977; 297:220-41. [PMID: 211900 DOI: 10.1111/j.1749-6632.1977.tb41856.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Seelig S, Sayers G. Bovine hypothalamic corticotropin releasing factor: chemical and biological characteristics. Fed Proc 1977; 36:2100-3. [PMID: 301482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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Sayers G, Seelig S, Kumar S. Isolated adrenal cortex cells in suspension: stimulation and inhibition of steroidogenesis by analogues of ACTH. J Steroid Biochem 1975; 6:371-5. [PMID: 171490 DOI: 10.1016/0022-4731(75)90159-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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48
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Seelig S, Lindley BD, Sayers G. A new approach to the structure-activity relationship for ACTH analogs using isolated adrenal cortex cells. Methods Enzymol 1975; 39:347-59. [PMID: 168468 DOI: 10.1016/s0076-6879(75)39031-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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49
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Sayers G, Lipschitz DA, Sayers M, Seftel HC, Bothwell TH, Charlton RW. Relationship between pica and iron nutrition in Johannesburg Black adults. S Afr Med J 1974; 48:1655-60. [PMID: 4854086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
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50
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Sayers G, Portanova R. Secretion of ACTH by isolated anterior pituitary cells: kinetics of stimulation of corticotropin-releasing factor and of inhibition by corticosterone. Endocrinology 1974; 94:1723-30. [PMID: 4364642 DOI: 10.1210/endo-94-6-1723] [Citation(s) in RCA: 42] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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