Science Library Category:

DTaP/Tdap

Published: 2014
SYNOPSIS

These data provide a plausible explanation for pertussis resurgence and suggest that attaining herd immunity will require the development of improved vaccination strategies that prevent B. pertussis colonization and transmission.

TITLE

Acellular pertussis vaccines protect against disease but fail to prevent infection and transmission in a nonhuman primate model

CITATION

Jason M. Warfel, Lindsey I. Zimmerman, and Tod J. Merkel; Proceedings of the National Academy of Sciences; January 14, 2014, 111 (2), 787-792; https://doi.org/10.1073/pnas.1314688110.

SUMMARY

In this study, researchers found that current acellular pertussis (aP) vaccines fail to prevent colonization and transmission. Nonhuman primates vaccinated with current acellular Pertussis (aP) were protected from severe symptoms but not infection and readily transmitted Bordetella pertussis to contacts.

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Published: 2010
SYNOPSIS

Acellular Pertussis vaccination interferes with the optimal clearance of B. parapertussis and enhances the performance of this pathogen. Our data raise the possibility that widespread acellular Pertussis vaccination can create hosts more susceptible to B. parapertussis infection.

TITLE

Acellular pertussis vaccination facilitates Bordetella parapertussis infection in a rodent model of bordetellosis

CITATION

Gráinne H. Long, Alexia T. Karanikas, Eric T. Harvill, Andrew F. Read and Peter J. Hudson, Proceedings of the Royal Society B, Biological Sciences; 03 March, 2010; Volume 277; https://doi.org/10.1098/rspb.2010.0010

SUMMARY

Despite over 50 years of population-wide vaccination, whooping cough incidence is on the rise. Although Bordetella pertussis is considered the main causative agent of whooping cough in humans, Bordetella parapertussis infections are not uncommon. The widely used acellular whooping cough vaccines (aP) are comprised solely of B. pertussis antigens that hold little or no efficacy against B. parapertussis. Here, we ask how aP vaccination affects competitive interactions between Bordetella species within co-infected rodent hosts and thus the aP-driven strength and direction of in-host selection. We show that aP vaccination helped clear B. pertussis but resulted in an approximately 40-fold increase in B. parapertussis lung colony-forming units (CFUs). Such vaccine-mediated facilitation of B. parapertussis did not arise as a result of competitive release; B. parapertussis CFUs were higher in aP-relative to sham-vaccinated hosts regardless of whether infections were single or mixed. Further, we show that aP vaccination impedes host immunity against B. parapertussis—measured as reduced lung inflammatory and neutrophil responses. Thus, we conclude that aP vaccination interferes with the optimal clearance of B. parapertussis and enhances the performance of this pathogen. Our data raise the possibility that widespread aP vaccination can create hosts more susceptible to B. parapertussis infection.

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Published: 2008
SYNOPSIS

Children who delayed the timing of the DPT vaccine had lower rates of asthma.

TITLE

Delay in diphtheria, pertussis, tetanus vaccination is associated with a reduced risk of childhood asthma?

CITATION

Kara L. McDonald, MS, Shamima I. Huq, BS. Journal of the American Academy of Allergy, Asthma and Immunology, 2008, 121:626-31.

SUMMARY

“Early childhood immunizations have been viewed as promoters of asthma development by stimulating a T(H)2-type immune response or decreasing microbial pressure, which shifts the balance between T(H)1 and T(H)2 immunity. Among 11, 531 children who received at least 4 doses of DPT, the risk of asthma was reduced to (1/2) in children whose first dose of DPT was delayed by more than 2 months.”

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Published: 2000
SYNOPSIS

UCLA researchers find the DTP vaccine is causing asthma.

TITLE

Effects of Diphtheria-Tetanus-Pertussis or Tetanus Vaccination on Allergies and Allergy-Related Respiratory Symptoms Among Children and Adolescents in the United States

CITATION

Eric L. Hurwitz, DC, PhD, and Hal Morgenstern, PhD. Journal of Manipulative and Physiological Therapeutics, Volume 23, Number 2, February 2000.

SUMMARY

“Asthma and other allergic hypersensitivity reactions and related symptoms may be caused, in part, by the delayed effects of DTP or tetanus vaccination. Because the proportion of US children who have received at least 1 dose of DTP vaccine approaches 100%, the number of allergies and allergy-related conditions attributable to DTP or tetanus vaccination in the United States may be very high. For example, assuming that the estimated vaccination effect is unbiased, 50% of diagnosed asthma cases (2.93 million) in US children and adolescents would be prevented if the DTP or tetanus vaccination was not administered.”

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