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J Infect Dis ; 223(12): 2072-2079, 2021 06 15.
Article in English | MEDLINE | ID: mdl-31965186

ABSTRACT

BACKGROUND: Severity of human metapneumovirus (hMPV) lower respiratory illness (LRTI) is considered similar to that observed for respiratory syncytial virus (RSV). However, differences in severity between these pathogens have been noted, suggesting the degree of illness may vary in different populations. Moreover, a potential association between hMPV and asthma also suggests that hMPV may preferentially affect asthmatic subjects. METHODS: In a population-based surveillance study in children aged <2 years admitted for severe LRTI in Argentina, nasopharyngeal aspirates were tested by RT-PCR for hMPV, RSV, influenza A, and human rhinovirus. RESULTS: Of 3947 children, 383 (10%) were infected with hMPV. The hospitalization rate for hMPV LRTI was 2.26 per 1000 children (95% confidence interval [CI], 2.04-2.49). Thirty-nine (10.2%) patients infected with hMPV experienced life-threatening disease (LTD; 0.23 per 1000 children; 95% CI, .16-.31/1000), and 2 died (mortality rate 0.024 per 1000; 95% CI, .003-.086). In hMPV-infected children birth to an asthmatic mother was an increased risk for LTD (odds ratio, 4.72; 95% CI, 1.39-16.01). We observed a specific interaction between maternal asthma and hMPV infection affecting risk for LTD. CONCLUSIONS: Maternal asthma increases the risk for LTD in children <2 years old hospitalized for severe hMPV LRTI.


Subject(s)
Asthma , Paramyxoviridae Infections , Respiratory Tract Infections , Argentina/epidemiology , Asthma/epidemiology , Child, Preschool , Disease Susceptibility , Humans , Infant , Lung , Metapneumovirus , Paramyxoviridae Infections/complications , Paramyxoviridae Infections/epidemiology , Respiratory Tract Infections/complications , Respiratory Tract Infections/epidemiology
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