Temporal trends in circulating Bordetella pertussis strains in Australia
نویسندگان
چکیده
منابع مشابه
Allelic variations between vaccine strains and circulating strains in pxtP of Bordetella pertussis in Iran
Introduction: Despite high level of vaccination against pertussis‚ whooping cough has re-emerged as a health threat, especially in infants. This could be related to expansion of Bordetella pertussis with novel alleles for virulence factors including the pertussis toxin promoter, ptxP3. Compared to ptxp1 strains‚ ptxp3 strains produce more pertussis toxin which results in immune supp...
متن کاملallelic variations between vaccine strains and circulating strains in pxtp of bordetella pertussis in iran
introduction: despite high level of vaccination against pertussis‚ whooping cough has re-emerged as a health threat, especially in infants. this could be related to expansion of bordetella pertussis with novel alleles for virulence factors including the pertussis toxin promoter, ptxp3. compared to ptxp1 strains‚ ptxp3 strains produce more pertussis toxin which results in immune suppression and ...
متن کاملTemporal Trends in Bordetella pertussis Populations, Denmark, 1949–2010
We used multilocus variable-number tandem repeat analysis and multiple antigen sequence typing to characterize isolates of Bordetella pertussis strains circulating in Denmark during periods with and without pertussis vaccination coverage. Our results show substantial shifts in the B. pertussis population over time and a reduction in genetic diversity. These changes might have resulted from the ...
متن کاملVirulence Factors Variation Among Bordetella Pertussis Isolates in Iran
Pertussis is still endemic and the recently resurgence of the disease caused by Bordetella pertussis has been shown in many countries. The polymorphism of the virulence genes of B. pertussis and lack of any information about the allelic variation between the Iranian isolates promotes us to analysis of the genes encoded virulence factors including ptxS1, prn, fim3 and cya to understand the diffe...
متن کاملRapid Increase in Pertactin-deficient Bordetella pertussis Isolates, Australia
Acellular vaccines against Bordetella pertussis were introduced in Australia in 1997. By 2000, these vaccines had replaced whole-cell vaccines. During 2008-2012, a large outbreak of pertussis occurred. During this period, 30% (96/320) of B. pertussis isolates did not express the vaccine antigen pertactin (Prn). Multiple mechanisms of Prn inactivation were documented, including IS481 and IS1002 ...
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ژورنال
عنوان ژورنال: Epidemiology and Infection
سال: 2004
ISSN: 0950-2688,1469-4409
DOI: 10.1017/s095026880300164x