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Acute viral lower respiratory tract infections in children

Korean Journal of Pediatrics 2009;52(3):269-276.
Published online March 15, 2009.
Acute viral lower respiratory tract infections in children
Joon Soo Park
Department of Pediatrics, Soonchunhyang University School of Medicine, Cheonan, Korea
소아 급성 바이러스 하기도염
박준수
순천향대학교 의과대학 소아과학교실
Correspondence: 
Joon Soo Park, Email: allergist@korea.com
Abstract
Viruses are the most common cause of lower respiratory tract infections (LRTIs) in infants and young children and are a major public health problem in this age group. Viruses were identified in 54.9-70.4% of hospitalized infants and children with LRTIs in Korea. The viral pathogens identified included respiratory syncytial virus (RSV) A and RSV B, influenza (Inf) A, Inf B, parainfluenza (PIV)1, PIV2, human bocavirus (hBoV), human rhinovirus (hRV), adenovirus (ADV), human metapneumovirus (hMPV), human coronavirus (hCoV)-OC 43, hCoV-229E, hCoV-NL63, hCoV-HKU1, and human enterovirus (hEV). Coinfections with ≥2 viruses were observed in 11.5-22.8% of children. The occurrence of LRTIs was the highest in the first year of life. The specific viruses are frequently associated with specific clinical syndromes of LRTIs. LRTIs caused by RSV were predominant among younger infants. hRV accounted for a larger proportion of LRTIs in young infants than ADV and hBoV. hMPV was frequently detected in children >24 months old. The number of hMPV infections peaked between February and May, whereas hRV was detected throughout the year. Thus far, hCoV is a less common respiratory pathogen in cases of ALRI and URI in Korean children.
Key Words: Viruses, Children, Respiratory tract, Infection


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