Assessment of the duration of protection in Campylobacter jejuni experimental infection in humans

David R. Tribble, Shahida Baqar, Daniel A. Scott, Michael L. Oplinger, Fernando Trespalacios, David Rollins, Richard I. Walker, John D. Clements, Steven Walz, Paul Gibbs, Edward F. Burg, Anthony P. Moran, Lisa Applebee, A. Louis Bourgeois

Research output: Contribution to journalArticlepeer-review

81 Scopus citations

Abstract

A human Campylobacter jejuni infection model provided controlled exposure to assess vaccine efficacy and investigate protective immunity for this important diarrheal pathogen. A well-characterized outbreak strain, C. jejuni 81-176, was investigated using a volunteer experimental infection model to evaluate the dose range and. STV (25% of the subjects were not infected; 3-log-lower maximum excretion level). Systemic and mucosal immune responses were robust in naïve subjects irrespective of the dose or the severity of illness. In contrast, in STV there was a lack of circulating antibody-secreting cells (ASC), reflecting the local mucosal effector responses. LTV exhibited comparable ASC responses to primary infection, and anamnestic fecal IgA responses likely contributed to self-resolving illness prior to antibiotic treatment. Campylobacter antigen-dependent production of gamma interferon by peripheral blood mononuclear cells was strongly associated with protection from illness, supporting the hypothesis that TH1 polarization has a primary role in acquired immunity to C. jejuni. This study revealed a C. jejuni dose-related increase in campylobacteriosis rates, evidence of complete short-term protection that waned with time, and immune response patterns associated with protection.

Original languageEnglish
Pages (from-to)1750-1759
Number of pages10
JournalInfection and Immunity
Volume78
Issue number4
DOIs
StatePublished - Apr 2010
Externally publishedYes

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