Pertussis resurgence: waning immunity and pathogen adaptation – two sides of the same coin
Top Cited Papers
- 13 February 2013
- journal article
- review article
- Published by Cambridge University Press (CUP) in Epidemiology and Infection
- Vol. 142 (4), 685-694
- https://doi.org/10.1017/s0950268813000071
Abstract
SUMMARY: Pertussis or whooping cough has persisted and resurged in the face of vaccination and has become one of the most prevalent vaccine-preventable diseases in Western countries. The high circulation rate ofBordetella pertussisposes a threat to infants that have not been (completely) vaccinated and for whom pertussis is a severe, life-threatening, disease. The increase in pertussis is mainly found in age groups in which immunity has waned and this has resulted in the perception that waning immunity is the main or exclusive cause for the resurgence of pertussis. However, significant changes inB. pertussispopulations have been observed after the introduction of vaccinations, suggesting a role for pathogen adaptation in the persistence and resurgence of pertussis. These changes include antigenic divergence with vaccine strains and increased production of pertussis toxin. Antigenic divergence will affect both memory recall and the efficacy of antibodies, while higher levels of pertussis toxin may increase suppression of the innate and acquired immune system. We propose these adaptations ofB. pertussishave decreased the period in which pertussis vaccines are effective and thus enhanced the waning of immunity. We plead for a more integrated approach to the pertussis problem which includes the characteristics of the vaccines, theB. pertussispopulations and the interaction between the two.Keywords
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