نتایج جستجو برای: bordetella parapertussis
تعداد نتایج: 3882 فیلتر نتایج به سال:
Bordetella bronchiseptica PagP (PagPBB) is a lipid A palmitoyl transferase that is required for resistance to antibody-dependent complement-mediated killing in a murine model of infection. B. parapertussis contains a putative pagP homolog (encoding B. parapertussis PagP [PagPBPa]), but its role in the biosynthesis of lipid A, the membrane anchor of lipopolysaccharide (LPS), has not been investi...
Lipopolysaccharide (LPS), as the major surface molecule of gram-negative bacteria, interacts with the host in complex ways, both inducing and protecting against aspects of inflammatory and adaptive immunity. The membrane-distal repeated carbohydrate structure of LPS, the O antigen, can prevent antibody functions and may vary as a mechanism of immune evasion. Genes of the wbm locus are required ...
Bordetella avium is a pathogen of poultry and is phylogenetically distinct from Bordetella bronchiseptica, Bordetella pertussis, and Bordetella parapertussis, which are other species in the Bordetella genus that infect mammals. In order to understand the evolutionary relatedness of Bordetella species and further the understanding of pathogenesis, we obtained the complete genome sequence of B. a...
Bordetella are Gram negative bacteria that cause respiratory tract infections in humans and animals. While at least five different species of Bordetella are known to exist, this review focuses on B. pertussis, B. bronchiseptica and B. parapertussis subspecies. In their virulent phase, all of these bacteria produce a nearly identical set of virulence factors which include adhesins such as filame...
Nasopharyngeal secretions from 223 patients were examined for the presence of Bordetella pertussis and B. parapertussis by culturing on Regan-Lowe agar (J. Regan and F. Lowe, J. Clin. Microbiol. 6:303-309, 1977) and by direct fluorescent-antibody testing. B. pertussis was found in 38 patients; B. parapertussis was recovered from 2. Culturing was more sensitive (38 of 38 patients) than direct fl...
Although the genus Bordetella contains several closely related species, pertussis toxin (PT) is produced only by phase I Bordetella pertussis. In this work we have studied the regulation of expression of the PT operon and investigated why PT is produced by phase I and not by phase III B. pertussis despite the presence of the PT genes. We have constructed a vector for Bordetella species that con...
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