Molecular typing of Bordetella pertussis isolates recovered from Belgian children and their household members

Clinical Infectious Diseases : an Official Publication of the Infectious Diseases Society of America
Iris De SchutterSabine Lauwers

Abstract

Recently, a moderate increase in the prevalence of pertussis, possibly contracted from adults, has been observed among unvaccinated children. During a 3-year period, we prospectively enrolled 93 index patients with a polymerase chain reaction (PCR) and/or culture result positive for Bordetella pertussis. Among 63 household contacts of 28 index patients, PCR and culture for B. pertussis identified 25 B. pertussis-positive persons. Nineteen of 25 B. pertussis-positive household contacts were asymptomatic. Isolates were available from 10 families of both index patients and household contacts for molecular typing by pulsed-field gel electrophoresis (PFGE) and for genotyping of pertactin and pertussis toxin by sequence-specific PCR and sequencing. PFGE demonstrated homogeneity among the isolates recovered from within each family but heterogeneity among the isolates recovered from different families. B. pertussis isolates recovered from index patients and their household contacts were indistinguishable by molecular typing, demonstrating that identical strains can cause full pertussis disease in children and asymptomatic infection in adults and adolescents.

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Citations

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Feb 25, 2011·Clinical and Vaccine Immunology : CVI·Muriel VincentRaymond Vanhoof
Apr 9, 2004·Journal of Clinical Microbiology·Gaëtan MuyldermansSabine Lauwers
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Jul 2, 2019·Clinical Infectious Diseases : an Official Publication of the Infectious Diseases Society of America·Rodger CraigShelly Bolotin
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