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Current Pediatric Reviews

Editor-in-Chief

ISSN (Print): 1573-3963
ISSN (Online): 1875-6336

Review Article

Why do some Children Get Sick with Recurrent Respiratory Infections?

Author(s): Fabio Cardinale, Francesco La Torre, Lucia Grazia Tricarico, Giuseppe Verriello and Carla Mastrorilli*

Volume 20, Issue 3, 2024

Published on: 18 September, 2023

Page: [203 - 215] Pages: 13

DOI: 10.2174/1573396320666230912103056

Price: $65

Abstract

Respiratory tract infections (RTI) represent a frequent condition, particularly among preschool children, with an important burden on the affected children and their families. It has been estimated that recurrent RTIs affect up to 25% of children during the first 4 years of life. These infections are mainly caused by viruses and are generally self-limiting. Social and environmental factors have been studied in determining the incidence of recurrent RTIs and the mostly recognized are precocious day care attendance, tobacco exposure and pollution. Primary immune defects, local anatomical factors, and genetic disorders such as primary ciliary dyskinesia or cystic fibrosis, may be also involved in recurrent RTIs of a subgroup of children, typically characterized by more severe and chronic symptoms. However, there is increasing awareness that RTIs have a complex pathophysiology and that some underrecognized factors, including genetic susceptibility to infections, low levels of some micronutrients, and respiratory microbiota might shape the probability for the child to develop RTIs. The sum (i.e. the number) of these factors may help in explaining why some children get sick for RTIs whilst other not. In some children iatrogenic factors, including improper use of antibiotics and NSAIDS or glucocorticoids might also aggravate this condition, further weakening the host's immune response and the possibly of establishing a “vicious circle”. The present review aims to focus on several possible factors involved in influencing RTIs and to propose a unifying hypothesis on pathophysiological mechanisms of unexplained recurrent RTIs in children.

Keywords: Atopy, children, environmental factors, genetics, obesity, pathogenesis, pediatric, recurrent respiratory infections, respiratory microbiota, vitamin D.

Graphical Abstract
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