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  • 1
    In: The Journal of Infectious Diseases, Oxford University Press (OUP), Vol. 222, No. Supplement_7 ( 2020-10-07), p. S606-S612
    Abstract: Respiratory syncytial virus (RSV) causes significant morbidity and mortality in infants worldwide. Although prematurity and cardiopulmonary disease are risk factors for severe disease, the majority of infants hospitalized with RSV are previously healthy. Various vaccines and therapeutics are under development and expected to be available in the near future. To inform the use of these new vaccines and therapeutics, it is necessary to determine the burden of RSV disease in Europe. We will prospectively follow-up a birth cohort to obtain incidence data on RSV acute respiratory tract infection (ARTI). Methods Multicenter prospective study of a birth cohort consisting of 10 000 healthy infants, recruited during 3 consecutive years. RSV associated hospitalization in the first year of life will be determined by questionnaires and hospital chart reviews. A nested cohort of 1000 infants will be actively followed. In case of ARTI, a respiratory sample will be collected for RSV molecular diagnosis. Results The primary outcome is the incidence rate of RSV-associated hospitalization in the first year of life. In the active cohort the primary outcome is RSV associated ARTI and MA-ARTI. Conclusions We will provide key information to fill the gaps in knowledge about the burden of RSV disease in healthy infants. Clinical Trials Registration NCT03627572.
    Type of Medium: Online Resource
    ISSN: 0022-1899 , 1537-6613
    RVK:
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2020
    detail.hit.zdb_id: 1473843-0
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  • 2
    In: The Journal of Infectious Diseases, Oxford University Press (OUP), Vol. 222, No. Supplement_7 ( 2020-10-07), p. S634-S639
    Abstract: Respiratory syncytial virus (RSV)–related acute lower respiratory infection is an important cause of death in infants and young children. However, little is known about the risk period for RSV-related deaths after presentation to health services with an RSV illness. Methods Using the Scottish national mortality database, we identified deaths from respiratory/circulatory causes (hereafter “respiratory/circulatory deaths”) in young children aged & lt;5 years during 2009–2016, whose medical history and records of laboratory-confirmed RSV infections were obtained by linking the mortality database to the national surveillance data set and the Scottish Morbidity Record. We used a self-controlled case series (SCCS) design to evaluate the relative incidence of deaths with respiratory/circulatory deaths in the first year after an RSV episode. We defined the risk interval as the first year after the RSV episode, and the control interval as the period before and after the risk interval until 5 years after birth. Age-adjusted incidence ratio and attributable fraction were generated using the R software package SCCS. Results We included 162 respiratory/circulatory deaths, of which 36 occurred in children with a history of laboratory-confirmed RSV infection. We found that the mortality risk decreased with time after the RSV episode and that the risk was statistically significant for the month after RSV illness. More than 90% of respiratory/circulatory deaths occurring within 1 week after the RSV episode were attributable to RSV (attributable fraction, 93.9%; 95% confidence interval, 77.6%–98.4%), compared with about 80% of those occurring 1 week to 1 month after RSV illness (80.3%; 28.5%–94.6%). Conclusions We found an increased risk of death in the first month after an RSV illness episode leading to healthcare attendance. This provides a practical cutoff time window for community-based surveillance studies estimating RSV-related mortality risk. Further studies are warranted to assess the mortality risk beyond the first month after RSV illness episode.
    Type of Medium: Online Resource
    ISSN: 0022-1899 , 1537-6613
    RVK:
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2020
    detail.hit.zdb_id: 1473843-0
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  • 3
    In: The Journal of Infectious Diseases, Oxford University Press (OUP), Vol. 222, No. Supplement_7 ( 2020-10-07), p. S688-S694
    Abstract: Respiratory syncytial virus (RSV) is a leading cause of respiratory tract illness in young children and a major cause of hospital admissions globally. Methods Here we fit age-structured transmission models with immunity propagation to data from the Netherlands (2012–2017). Data included nationwide hospitalizations with confirmed RSV, general practitioner (GP) data on attendance for care from acute respiratory infection, and virological testing of acute respiratory infections at the GP. The transmission models, equipped with key parameter estimates, were used to predict the impact of maternal and pediatric vaccination. Results Estimates of the basic reproduction number were generally high (R0 & gt; 10 in scenarios with high statistical support), while susceptibility was estimated to be low in nonelderly adults ( & lt;10% in persons 20–64 years) and was higher in older adults (≥65 years). Scenario analyses predicted that maternal vaccination reduces the incidence of infection in vulnerable infants ( & lt;1 year) and shifts the age of first infection from infants to young children. Conclusions Pediatric vaccination is expected to reduce the incidence of infection in infants and young children (0–5 years), slightly increase incidence in 5 to 9-year-old children, and have minor indirect benefits.
    Type of Medium: Online Resource
    ISSN: 0022-1899 , 1537-6613
    RVK:
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2020
    detail.hit.zdb_id: 1473843-0
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  • 4
    In: The Journal of Infectious Diseases, Oxford University Press (OUP), Vol. 222, No. Supplement_7 ( 2020-10-07), p. S628-S633
    Abstract: Recurrent wheeze and asthma in childhood are commons causes of chronic respiratory morbidity globally. We aimed to explore the association between respiratory syncytial virus (RSV) infection in early life and subsequent respiratory sequelae up to age 12 years. Methods We estimated the strength of association by 3 control groups and 3 follow-up age groups, with data from studies published between January 1995 and May 2018. We also estimated associations by diagnostic criteria, age at infection, and high-risk population. Results Overall, we included 41 studies. A statistically significant association was observed between early life RSV infection and subsequent childhood recurrent wheeze, in comparison to those who were healthy or those without respiratory symptoms: OR 3.05 (95% confidence interval [CI], 2.50–3.71) for 0 to & lt;36 months follow-up age; OR 2.60 (95% CI, 1.67–4.04) for 36–72 months; and OR 2.14 (95% CI, 1.33–3.45) for 73–144 months. For the subsequent development of asthma, a statistically significant association was observed only in relation to those aged 73–144 months at follow-up: OR 2.95 (95% CI, 1.96–4.46). Conclusions Further studies using standardized definitions and from diverse settings are needed to elucidate the role of confounders and provide more robust estimates.
    Type of Medium: Online Resource
    ISSN: 0022-1899 , 1537-6613
    RVK:
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2020
    detail.hit.zdb_id: 1473843-0
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  • 5
    In: The Journal of Infectious Diseases, Oxford University Press (OUP), Vol. 222, No. Supplement_7 ( 2020-10-07), p. S592-S598
    Abstract: Bronchiolitis is the commonest cause of respiratory related hospital admissions in young children. This study aimed to describe temporal trends in bronchiolitis admissions for children under 2 years of age in Scotland by patient characteristics, socioeconomic deprivation, and duration of admission. Methods The national hospital admissions database for Scotland was used to extract data on all bronchiolitis admissions (International Classification of Disease, Tenth Revision, code J21) in children & lt;2 years of age from 2001 to 2016. Deprivation quintiles were classified using the 2011 Scottish Index of Multiple Deprivation. Results Over the 15-year study period, admission rates for children under 2 years old increased 2.20-fold (95% confidence interval [CI], 1.4–3.6-fold) from 17.2 (15.9–18.5) to 37.7 (37.4–38.1) admissions per 1000 children per year. Admissions peaked in infants aged 1 month, and in those born in the 3 months preceding the peak bronchiolitis month—September, October, and November. Admissions from the most-deprived quintile had the highest overall rate of admission, at 40.5 per 1000 children per year (95% CI, 39.5–41.5) compared with the least-deprived quintile, at 23.0 admissions per 1000 children per year (22.1–23.9). The most-deprived quintile had the greatest increase in admissions over time, whereas the least-deprived quintile had the lowest increase. Zero-day admissions, defined as admission and discharge within the same calendar date, increased 5.3-fold (5.1–5.5) over the study period, with the highest increase in patients in the most-deprived quintile. Conclusions This study provides baseline epidemiological data to aid policy makers in the strategic planning of preventative interventions. With the majority of bronchiolitis caused by respiratory syncytial virus (RSV), and several RSV vaccines and monoclonal antibodies currently in clinical trials, understanding national trends in bronchiolitis admissions is an important proxy for determining potential RSV vaccination strategies.
    Type of Medium: Online Resource
    ISSN: 0022-1899 , 1537-6613
    RVK:
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2020
    detail.hit.zdb_id: 1473843-0
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  • 6
    In: The Journal of Infectious Diseases, Oxford University Press (OUP), Vol. 222, No. Supplement_7 ( 2020-10-07), p. S672-S679
    Abstract: Bronchiolitis is the leading cause of hospital admission for respiratory disease among infants aged & lt;1 year. Clinical practice guidelines can benefit patients by reducing the performance of unnecessary tests, hospital admissions, and treatment with lack of a supportive evidence base. This review aimed to identify current clinical practice guidelines worldwide, appraise their methodological quality, and discuss variability across guidelines for the diagnosis and management of bronchiolitis. Methods A systematic literature review of electronic databases EMBASE, Global Health, and Medline was performed. Manual searches of the gray literature, national pediatric society websites, and guideline-focused databases were performed, and select international experts were contacted to identify additional guidelines. The Appraisal of Guidelines for Research and Evaluation assessment tool was used by 2 independent reviewers to appraise each guideline. Results Thirty-two clinical practice guidelines met the selection criteria. Quality assessment revealed significant shortcomings in a number of guidelines, including lack of systematic processes in formulating guidelines, failure to state conflicts of interest, and lack of consultation with families of affected children. There was widespread agreement about a number of aspects, such as avoidance of the use of unnecessary diagnostic tests, risk factors for severe disease, indicators for hospital admission, discharge criteria, and nosocomial infection control. However, there was variability, even within areas of consensus, over specific recommendations, such as variable thresholds for oxygen therapy. Guidelines showed significant variability in recommendations for the pharmacological management of bronchiolitis, with conflicting recommendations over whether use of nebulized epinephrine, hypertonic saline, or bronchodilators should be routinely trialled. Conclusions Future guidelines should aim to be compliant with international standards for clinical guidelines to improve their quality and clarity and to promote their adoption into practice. Variable recommendations between guidelines may reflect the evolving evidence base for bronchiolitis management, and platforms should be created to understand this variability and promote evidence-based recommendations.
    Type of Medium: Online Resource
    ISSN: 0022-1899 , 1537-6613
    RVK:
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2020
    detail.hit.zdb_id: 1473843-0
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  • 7
    In: The Journal of Infectious Diseases, Oxford University Press (OUP), Vol. 222, No. Supplement_7 ( 2020-10-07), p. S620-S627
    Abstract: Respiratory syncytial virus (RSV) is among the most important causes of acute lower respiratory tract infection (ALRI) in young children. We assessed the severity of RSV-ALRI in children less than 5 years old with bronchopulmonary dysplasia (BPD). Methods We searched for studies using EMBASE, Global Health, and MEDLINE. We assessed hospitalization risk, intensive care unit (ICU) admission, need for oxygen supplementation and mechanical ventilation, and in-hospital case fatality (hCFR) among children with BPD compared with those without (non-BPD). We compared the (1) length of hospital stay (LOS) and (2) duration of oxygen supplementation and mechanical ventilation between the groups. Results Twenty-nine studies fulfilled our inclusion criteria. The case definition for BPD varied substantially in the included studies. Risks were higher among children with BPD compared with non-BPD: RSV hospitalization (odds ratio [OR], 2.6; 95% confidence interval [CI] , 1.7–4.2; P & lt; .001), ICU admission (OR, 2.9; 95% CI, 2.3–3.5; P & lt; .001), need for oxygen supplementation (OR, 4.2; 95% CI, .5–33.7; P = .175) and mechanical ventilation (OR, 8.2; 95% CI, 7.6–8.9; P & lt; .001), and hCFR (OR, 12.8; 95% CI, 9.4–17.3; P & lt; .001). Median LOS (range) was 7.2 days (4–23) (BPD) compared with 2.5 days (1–30) (non-BPD). Median duration of oxygen supplementation (range) was 5.5 days (0–21) (BPD) compared with 2.0 days (0–26) (non-BPD). The duration of mechanical ventilation was more often longer ( & gt;6 days) in those with BPD compared with non-BPD (OR, 11.9; 95% CI, 1.4–100; P = .02). Conclusions The risk of severe RSV disease is considerably higher among children with BPD. There is an urgent need to establish standardized BPD case definitions, review the RSV prophylaxis guidelines, and encourage more specific studies on RSV infection in BPD patients, including vaccine development and RSV-specific treatment.
    Type of Medium: Online Resource
    ISSN: 0022-1899 , 1537-6613
    RVK:
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2020
    detail.hit.zdb_id: 1473843-0
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  • 8
    In: The Journal of Infectious Diseases, Oxford University Press (OUP), Vol. 222, No. Supplement_7 ( 2020-10-07), p. S570-S576
    Abstract: Pneumonia constitutes a substantial disease burden among adults overall and those who are elderly. We aimed to identify all studies investigating the disease burden among older adults (age, ≥65 years) admitted to the hospital with pneumonia. We estimated the hospital admission rate and in-hospital case-fatality ratio (CFR) of pneumonia in older adults, stratified by age and economic status (industrialized vs developing), with data from a systematic review of studies published from 1996 through 2017 and from 8 unpublished population-based studies. We applied these rate estimates to population estimates for 2015 to calculate the global and regional burden in older adults who would have been admitted to the hospital with pneumonia that year. We estimated the number of in-hospital pneumonia deaths by combining in-hospital CFRs with hospital admission estimates from hospital-based studies. We identified 109 eligible studies; 73 used clinical pneumonia as the case definition, and 36 used radiologically confirmed pneumonia as the case definition. We estimated that, in 2015, 6.8 million episodes (uncertainty range [UR], 5.8–8.0 episodes) of clinical pneumonia resulted in hospital admissions of older adults worldwide. The hospital admission rate increased with advancing age and was higher in men. The total disease burden was likely underestimated when using the definition of radiologically confirmed pneumonia. Based on data from 52 hospital studies reporting data on pneumonia mortality, we estimated that about 1.1 million in-hospital deaths (UR, 0.9–1.4 in-hospital deaths) occurred among older adults. The burden of pneumonia requiring hospitalization among older adults is substantial. Appropriate prevention and management strategies should be developed to reduce its impact.
    Type of Medium: Online Resource
    ISSN: 0022-1899 , 1537-6613
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    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2020
    detail.hit.zdb_id: 1473843-0
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  • 9
    In: The Journal of Infectious Diseases, Oxford University Press (OUP), Vol. 222, No. Supplement_7 ( 2020-10-07), p. S599-S605
    Abstract: Respiratory syncytial virus (RSV) is a leading cause of respiratory tract infection (RTI) in young children. Registries provide opportunities to explore RSV epidemiology and burden. Methods We explored routinely collected hospital data on RSV in children aged & lt; 5 years in 7 European countries. We compare RSV-associated admission rates, age, seasonality, and time trends between countries. Results We found similar age distributions of RSV-associated hospital admissions in each country, with the highest burden in children  & lt; 1 years old and peak at age 1 month. Average annual rates of RTI admission were 41.3–112.0 per 1000 children aged  & lt; 1 year and 8.6–22.3 per 1000 children aged  & lt; 1 year. In children aged  & lt; 5 years, 57%–72% of RTI admissions with specified causal pathogen were coded as RSV, with 62%–87% of pathogen-coded admissions in children  & lt; 1 year coded as RSV. Conclusions Our results demonstrate the benefits and limitations of using linked routinely collected data to explore epidemiology and burden of RSV. Our future work will use these data to generate estimates of RSV burden using time-series modelling methodology, to inform policymaking and regulatory decisions regarding RSV immunization strategy and monitor the impact of future vaccines.
    Type of Medium: Online Resource
    ISSN: 0022-1899 , 1537-6613
    RVK:
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2020
    detail.hit.zdb_id: 1473843-0
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  • 10
    In: The Journal of Infectious Diseases, Oxford University Press (OUP), Vol. 222, No. Supplement_7 ( 2020-10-07), p. S577-S583
    Abstract: Respiratory syncytial virus–associated acute respiratory infection (RSV-ARI) constitutes a substantial disease burden in older adults aged ≥65 years. We aimed to identify all studies worldwide investigating the disease burden of RSV-ARI in this population. We estimated the community incidence, hospitalization rate, and in-hospital case-fatality ratio (hCFR) of RSV-ARI in older adults, stratified by industrialized and developing regions, using data from a systematic review of studies published between January 1996 and April 2018 and 8 unpublished population-based studies. We applied these rate estimates to population estimates for 2015 to calculate the global and regional burdens in older adults with RSV-ARI in the community and in hospitals for that year. We estimated the number of in-hospital deaths due to RSV-ARI by combining hCFR data with hospital admission estimates from hospital-based studies. In 2015, there were about 1.5 million episodes (95% confidence interval [CI], .3 million–6.9 million) of RSV-ARI in older adults in industrialized countries (data for developing countries were missing), and of these, approximately 14.5% (214 000 episodes; 95% CI, 100 000–459 000) were admitted to hospitals. The global number of hospital admissions for RSV-ARI in older adults was estimated at 336 000 hospitalizations (uncertainty range [UR] , 186 000–614 000). We further estimated about 14 000 in-hospital deaths (UR, 5000–50 000) related to RSV-ARI globally. The hospital admission rate and hCFR were higher for those aged ≥65 years than for those aged 50–64 years. The disease burden of RSV-ARI among older adults is substantial, with limited data from developing countries. Appropriate prevention and management strategies are needed to reduce this burden.
    Type of Medium: Online Resource
    ISSN: 0022-1899 , 1537-6613
    RVK:
    Language: English
    Publisher: Oxford University Press (OUP)
    Publication Date: 2020
    detail.hit.zdb_id: 1473843-0
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