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Published in: Infection 2/2017

01-04-2017 | Original Paper

Parents as source of pertussis transmission in hospitalized young infants

Authors: Giorgio Fedele, Maria Carollo, Raffaella Palazzo, Paola Stefanelli, Elisabetta Pandolfi, Francesco Gesualdo, Alberto Eugenio Tozzi, Rita Carsetti, Alberto Villani, Ambra Nicolai, Fabio Midulla, Clara Maria Ausiello, The Pertussis Study Group

Published in: Infection | Issue 2/2017

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Abstract

Purpose

This study was planned to collect evidences of familial pertussis transmission to infants younger than 6 months of age. Understanding the dynamics of transmission of pertussis in families is essential to plan effective prevention strategies that could be integrated in pertussis control.

Methods

The seroprevalence of IgG antibodies to pertussis toxin (PT-IgG) and prolonged cough symptoms were evaluated in parents of 55 infants aged <6 months hospitalized for confirmed pertussis. Parents of 33 infants with lower respiratory tract infection (LRTI) and parents of 57 healthy infants admitted as outpatients for hip ultrasound examination (HE) were enrolled as controls.

Results

Parents of pertussis cases had PT-IgG levels significantly higher as compared to LRTI and HE parents. More than 40 % were compatible as transmitters of pertussis to their babies, since they had a level of PT-IgG ≥ 100 IU/ml, which is considered diagnostic for a recent pertussis episode. Based on serology, the percentage of pertussis cases that had at least one parent as source of infection was 49.1 %. When cough symptoms were taken into account, the percentage of parents putative transmitters of the infection to their infants increased to 56.4 %.

Conclusions

Parents are scarcely aware of the household transmission of pertussis to their newborns. Our study highlights the need to advise parents about the likelihood of transmission to the newborn and to be particularly aware of coughing symptoms in the household. Since infection can be asymptomatic, a serological survey of family members should also be considered.
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Metadata
Title
Parents as source of pertussis transmission in hospitalized young infants
Authors
Giorgio Fedele
Maria Carollo
Raffaella Palazzo
Paola Stefanelli
Elisabetta Pandolfi
Francesco Gesualdo
Alberto Eugenio Tozzi
Rita Carsetti
Alberto Villani
Ambra Nicolai
Fabio Midulla
Clara Maria Ausiello
The Pertussis Study Group
Publication date
01-04-2017
Publisher
Springer Berlin Heidelberg
Published in
Infection / Issue 2/2017
Print ISSN: 0300-8126
Electronic ISSN: 1439-0973
DOI
https://doi.org/10.1007/s15010-016-0943-6

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