نتایج جستجو برای: bordetella species
تعداد نتایج: 551491 فیلتر نتایج به سال:
The morphology of cells and the hemagglutinogens isolated from cultures of Bordetella pertussis, Bordetella bronchiseptica, and Bordetella parapertussis were studied by electron microscopy with the negative-staining technique. Cells of all three species had long, thin (3 nm thick), peritrichously arranged fimbriae on the cell surface. Similar structures were found in purified hemagglutinogen pr...
Filamentous hemagglutinin (FHA) is a large (>200 kDa), rod-shaped protein expressed by bordetellae that is both surface-associated and secreted. FHA mediates bacterial adherence to epithelial cells and macrophages in vitro and is absolutely required for tracheal colonization in vivo. The recently sequenced Bordetella bronchiseptica genome revealed the presence of a gene, fhaS, that is nearly id...
background and aims: pertussis is a highly contagious, vaccine-preventable disease. determination of the seroepidemiology of pertussis makes possible the evaluation of pertussis immunity in a population. in this study, we determined the seroprevalence of bordetella pertussis igg antibodies in different age groups in tehran, iran. materials and methods: overall, 1101 subjects between ages of 8 ...
Surfactant proteins A (SP-A) and D (SP-D) play an important role in the innate immune defenses of the respiratory tract. SP-A binds to the lipid A region of lipopolysaccharide (LPS), and SP-D binds to the core oligosaccharide region. Both proteins induce aggregation, act as opsonins for neutrophils and macrophages, and have direct antimicrobial activity. Bordetella pertussis LPS has a branched ...
BACKGROUND The clinical presentation of Bordetella pertussis can overlap with that of respiratory syncytial virus (RSV); however, management differs. HYPOTHESIS First, the prevalence of B. pertussis is less than 2% among patients screened for RSV, and second the prevalence of B. parapertussis is also less than 2% among these patients. METHODS Nasal washings submitted to a clinical laborator...
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