Skip directly to site content Skip directly to page options Skip directly to A-Z link Skip directly to A-Z link Skip directly to A-Z link
Volume 18, Number 5—May 2012
Research

Temporal Trends in Bordetella pertussis Populations, Denmark, 1949–2010

Randi Føns PetersenComments to Author , Tine Dalby, Ditte Marie Dragsted, Frits Mooi, and Lotte Lambertsen
Author affiliations: Statens Serum Institut, Copenhagen, Denmark (R.F. Petersen, T. Dalby, L. Lambertsen); private practitioner, Frederiksberg, Denmark (D.M. Dragsted); National Institute for Public Health and the Environment (RIVM), Bilthoven, the Netherlands (F. Mooi)

Main Article

Table 4

MASTs detected in isolates analyzed in a study of temporal trends in Bordetella pertussis populations, Denmark, 1949–2009*

MASTdk Allele types in MASTdk
No. isolates (% frequency)†
prn ptxA ptxP tcfA Total period, n = 142 Period 1, n = 24 Period 2, n = 41 Period 3, n = 77
MAST1.dk 2 1 3 2 50 (35) ND 2 (5) 48 (63)
MAST2.dk 2 1 1 2 26 (18) ND 9 (22) 17 (22)
MAST3.dk 1 1 1 2 22 (15) 3 (13) 17 (42) 2 (3)
MAST4.dk 1 2 1 2 13 (9) 8 (33) 5 (12) ND
MAST5.dk 7 4 2 2 8 (6) 8 (33) ND ND
MAST6.dk 3 1 1 3 8 (6) ND 3 (7) 5 (7)
MAST7.dk 3 1 1 2 5 (3) ND 4 (10) 1 (1)
MAST8.dk 1 4 2 2 3 (2) 3 (13) ND ND
MAST9.dk 2 1 1 3 2 (1) ND 1 (2) 1 (1)
MAST10.dk 2 1 15 2 1 (1) ND ND 1 (1)
MAST11.dk 7 2 2 2 1 (1) 1 (4) ND ND
MAST12.dk 3 1 3 2 1 (1) ND ND 1 (1)
MAST13.dk 1 1 17 2 1 (1) ND ND 1 (1)
MAST14.dk 1 4 1 2 1 (1) 1 (4) ND ND

*Sequence types are given in the order prn-ptxA-ptxP-tcfA. MASTs, multilocus sequence types; MASTdk, MAST types detected in Denmark during 1949–2010. ND, none detected.
†Genetic diversity index calculated on multilocus variable-number tandem repeat analysis types. Calculations were done by using the online tool Comparing Partitions (www.comparingpartitions.info). Simpson’s index of diversity (95% CI) was 0.80 (0.76–0.84) for the total period, 0.77 (0.68–0.86) for period 1, 0.76 (0.67–0.85) for period 2, and 0.56 (0.45–0.67) for period 3.

Main Article

Page created: April 12, 2012
Page updated: April 12, 2012
Page reviewed: April 12, 2012
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.
file_external