Lung function prior to viral lower respiratory tract infections in prematurely born infants

Objective: To evaluate the relationship between lower respiratory tract infections (LRTI), in the first 2 years of life and lung function at school age in the Piccolipiù birth cohort (Italy). Methods: Data on LRTI (doctor diagnosis of bronchitis, bronchiolitis, pneumonia) and wheezing (≥3 episodes or a diagnosis of asthmatic bronchitis) in the first 2 years of life were obtained from parental questionnaires. Lung function was assessed at 7 years by spirometry and forced volume vital capacity (FVC), forced expiratory volume in one second (FEV1), FEV1/FVC, forced expiratory flow between 25 and 75%, and at 75% of FVC (FEF25-75 and FEF75) were reported as z-scores. The associations between LRTI and spirometric variables were estimated with linear regression models. Results: Among 877 children studied, 22.1% had LRTI only, 5.4% wheezing only, 13.2% had both, and 59.3% had neither LRTI nor wheezing. Children with LRTI had lower FVC and FEV1 than children without (z-score differences: -0.18 (95% Confidence Intervals, -0.31; -0.06) and -0.15 ( 0.27; -0.03)). When children were stratified by history of both LRTI and wheezing, there was no association between LRTI only and spirometric values. Conversely, having had both LRTI and wheezing was inversely associated with all lung function measures: z-score differences of -0.24 ( 0.42; -0.07); -0.42 (-0.59; -0.24); -0.25 (-0.41; -0.08); -0.37 (-0.54; -0.21); -0.30 (-0.46; -0.14) for FVC, FEV1, FEV1/FVC, FEF25-75 and FEF75, respectively. Conclusion: Infants with wheezing and LRTI, but not those with LRTI only, had reduced lung function at school-age.

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Functional and genetic predisposition to rhinovirus lower respiratory tract infections in prematurely born infants

European Journal of Pediatrics ◽

10.1007/s00431-016-2780-0 ◽

2016 ◽

Vol 175 (12) ◽

pp. 1943-1949 ◽

Cited By ~ 7

Author(s):

Simon B Drysdale ◽

Mireia Alcazar ◽

Theresa Wilson ◽

Melvyn Smith ◽

Mark Zuckerman ◽

...

Keyword(s):

Respiratory Tract ◽

Genetic Predisposition ◽

Lower Respiratory Tract ◽

Respiratory Tract Infections ◽

Lower Respiratory Tract Infections ◽

Tract Infections ◽

Prematurely Born Infants

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Chlamydia trachomatis during pregnancy and childhood asthma-related morbidity: a population-based prospective cohort

European Respiratory Journal ◽

10.1183/13993003.01829-2019 ◽

2020 ◽

Vol 56 (1) ◽

pp. 1901829

Author(s):

Evelien R. van Meel ◽

Marina Attanasi ◽

Vincent W.V. Jaddoe ◽

Irwin K.M. Reiss ◽

Henriëtte A. Moll ◽

...

Keyword(s):

Chlamydia Trachomatis ◽

Lung Function ◽

Respiratory Tract ◽

Forced Vital Capacity ◽

Lower Respiratory Tract ◽

Respiratory Tract Infections ◽

Vital Capacity ◽

Population Based ◽

Lower Respiratory Tract Infections ◽

Tract Infections

IntroductionChlamydia trachomatis is the most commonly reported sexually transmitted disease and although infection during pregnancy is associated with neonatal complications, long-term respiratory consequences are unknown. We aimed to determine whether C. trachomatis infection during pregnancy is associated with asthma-related symptoms across childhoodMethodsThis study among 2475 children and their mothers was embedded in a population-based prospective cohort study. Maternal urine samples were tested for C. trachomatis infection during pregnancy. Questionnaires provided information on childhood physician-attended lower respiratory tract infections and wheezing, and current asthma at age 10 years. Lung function was measured by spirometry at age 10 years.ResultsThe prevalence of C. trachomatis infection during pregnancy was 3.2% (78 out of 2475). C. trachomatis infection during pregnancy was not associated with lower respiratory tract infections until age 6 years, but was associated with a higher odds of wheezing in children until age 10 years (OR 1.50 (95% CI 1.10–2.03)). C. trachomatis infection during pregnancy was associated with an increased odds of asthma (OR 2.29 (95% CI 1.02–5.13)), and with a lower forced expiratory volume in 1 s/forced vital capacity and forced expiratory flow at 75% of forced vital capacity (z-score difference −0.28 (95% CI −0.52– −0.04) and −0.24 (95% CI −0.46– −0.01), respectively) in children at age 10 years. The observed associations were only partly explained by mode of delivery, gestational age at birth or birthweight.ConclusionsC. trachomatis infection during pregnancy is associated with increased odds of wheezing, asthma and impaired lung function. The causality of the observed associations and potential underlying mechanisms need to be explored.

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Chronic respiratory morbidity following viral lower respiratory tract infections in prematurely born infants

Journal of Pediatric Infectious Diseases ◽

10.1055/s-0035-1557094 ◽

2015 ◽

Vol 01 (04) ◽

pp. 205-211 ◽

Cited By ~ 3

Author(s):

Simon Broughton ◽

Mark Zuckerman ◽

Helen Auburn ◽

Melvyn Smith ◽

Grenville Fox ◽

...

Keyword(s):

Respiratory Tract ◽

Lower Respiratory Tract ◽

Respiratory Tract Infections ◽

Respiratory Morbidity ◽

Lower Respiratory Tract Infections ◽

Tract Infections ◽

Prematurely Born Infants

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A population-based prospective cohort study examining the influence of early-life respiratory tract infections on school-age lung function and asthma

Thorax ◽

10.1136/thoraxjnl-2017-210149 ◽

2017 ◽

Vol 73 (2) ◽

pp. 167-173 ◽

Cited By ~ 29

Author(s):

Evelien R van Meel ◽

Herman T den Dekker ◽

Niels J Elbert ◽

Pauline W Jansen ◽

Henriëtte A Moll ◽

...

Keyword(s):

Lung Function ◽

Respiratory Tract ◽

Early Life ◽

Lower Respiratory Tract ◽

Respiratory Tract Infections ◽

Population Based ◽

Lower Respiratory Tract Infections ◽

School Aged Children ◽

Increased Risk ◽

Tract Infections

BackgroundEarly-life respiratory tract infections could affect airway obstruction and increase asthma risk in later life. However, results from previous studies are inconsistent.ObjectiveWe examined the associations of early-life respiratory tract infections with lung function and asthma in school-aged children.MethodsThis study among 5197 children born between April 2002 and January 2006 was embedded in a population-based prospective cohort study. Information on physician-attended upper and lower respiratory tract infections until age 6 years (categorised into ≤ 3 and >3–6 years) was obtained by annual questionnaires. Spirometry measures and physician-diagnosed asthma were assessed at age 10 years.ResultsUpper respiratory tract infections were not associated with adverse respiratory outcomes. Compared with children without lower respiratory tract infections ≤3 years, children with lower respiratory tract infections ≤3 years had a lower FEV1, FVC, FEV1:FVC and forced expiratory flow at 75% of FVC (FEF75) (Z-score (95% CI): ranging from −0.22 (−0.31 to –0.12) to −0.12 (−0.21 to −0.03)) and an increased risk of asthma (OR (95% CI): 1.79 (1.19 to 2.59)). Children with lower respiratory tract infections >3–6 years had an increased risk of asthma (3.53 (2.37 to 5.17)) only. Results were not mediated by antibiotic or paracetamol use and not modified by inhalant allergic sensitisation. Cross-lagged modelling showed that results were not bidirectional and independent of preschool wheezing patterns.ConclusionEarly-life lower respiratory tract infections ≤3 years are most consistently associated with lower lung function and increased risk of asthma in school-aged children.

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