Effectiveness of the whole-cell pertussis vaccine produced in Poland against different Bordetella parapertussis isolates in the mouse intranasal challenge model.

Abstract

The aim of the study was to evaluate the effectiveness of the whole-cell pertussis vaccine produced locally and routinely used in Poland in the elimination of Bordetella parapertussis strains from the lungs and trachea of a mouse model. We found that the average protective effect against B. parapertussis in the lungs of mice immunized with the whole-cell pertussis vaccine (DTwP) was significantly higher than in animals immunized with the acellular pertussis vaccine (DTaP). The effectiveness of B. parapertussis elimination rates from the lungs of DTwP-immunized mice, depending on the strain used as a challenge, was found to be 1.2-3.0 times or 3.1-7.0 times lower than against Bordetella. pertussis Tohama I or vaccine B. pertussis 606/67 isolates, respectively. Our results show that the locally produced DTwP vaccine is able to protect against B. parapertussis isolates; however, the level of protection and course of B. parapertussis infection in the lungs and trachea seems to be strain specific.