Resident Microbiota Affect Bordetella pertussis Infectious Dose and Host Specificity
نویسندگان
چکیده
منابع مشابه
Resident microbiota affect Bordetella pertussis infectious dose and host specificity.
Before contacting host tissues, invading pathogens directly or indirectly interact with host microbiota, but the effects of such interactions on the initial stages of infection are poorly understood. Bordetella pertussis is highly infectious among humans but requires large doses to colonize rodents, unlike a closely related zoonotic pathogen, Bordetella bronchiseptica, raising important questio...
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Bordetella pertussis is a human-specific pathogen that causes whooping cough. The use of pertussis whole-cell vaccines in infants and toddlers led to decreased circulation of the bacterium in the child population and a marked decrease in the incidence of the disease. However, vaccine does not result in life-long immunity; indeed, the circulation of the bacterium has not been controlled in the a...
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The interaction between human neutrophils and wild-type Bordetella pertussis or mutants expressing altered lipopolysaccharide or lacking virulence factors-pertussis toxin, adenylate cyclase toxin, dermonecrotic toxin, filamentous hemagglutinin (FHA), pertactin, or BrkA-was examined. In the absence of antibodies, the wild-type strain and the mutants, with the exception of mutants lacking FHA, at...
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Whooping cough (pertussis) is a highly contagious disease of the human respiratory tract, which is caused by Bordetella pertussis. Reemerge of pertussis in some highly immunized populations and divergency in gene order among several B. pertussis strains promoted this research to study the change of pertussis toxin (PT) and lipopolysacharide levels in response to the different environments. Th...
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Bordetella pertussis produces a calmodulin-dependent adenylate cyclase (AC) which acts as a toxin capable of penetrating eukaryotic cells and generating high levels of intracellular cyclic AMP. Transfer of target cells into B. pertussis AC-free medium leads to a rapid decay in the intracellular AC activity, implying that the invasive enzyme is unstable in the host cytoplasm. We report here that...
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ژورنال
عنوان ژورنال: Journal of Infectious Diseases
سال: 2013
ISSN: 0022-1899,1537-6613
DOI: 10.1093/infdis/jit597