Toll-like receptor 4 limits transmission of Bordetella bronchiseptica

Olivier Rolin, Will Smallridge, Michael Henry, Laura Goodfield, David Place, Eric T. Harvill

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


Transmission of pathogens has been notoriously difficult to study under laboratory conditions leaving knowledge gaps regarding how bacterial factors and host immune components affect the spread of infections between hosts. We describe the development of a mouse model of transmission of a natural pathogen, Bordetella bronchiseptica, and its use to assess the impact of host immune functions. Although B. bronchiseptica transmits poorly between wild-type mice and mice lacking other immune components, it transmits efficiently between mice deficient in Toll-Like Receptor 4 (TLR4). TLR4-mutant mice were more susceptible to initial colonization, and poorly controlled pathogen growth and shedding. Heavy neutrophil infiltration distinguished TLR4-deficient responses, and neutrophil depletion did not affect respiratory CFU load, but decreased bacterial shedding. The effect of TLR4 response on transmission may explain the extensive variation in TLR4 agonist potency observed among closely related subspecies of Bordetella . This transmission model will enable mechanistic studies of how pathogens spread from one host to another, the defining feature of infectious disease.

Original languageEnglish (US)
Article numbere85229
JournalPloS one
Issue number1
StatePublished - Jan 30 2014

All Science Journal Classification (ASJC) codes

  • General


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