Wild-type Bordetella bronchiseptica strain RB50 (B. bronchiseptica) and a derivative btrS mutant (RB50ΔbtrS) (3 (link)), here called Bbvac (52 ), B. pertussis, and B. parapertussis were grown on plates of Difco Bordet-Gengou agar (BD; catalog no. 248200) supplemented with 20% defibrinated sheep blood from HemoStat and 20 μg/mL of streptomycin as previously described (1 (link)). For liquid cultures, B. pertussis and B. parapertussis were grown in Stainer-Scholte medium (1 (link)). B. bronchiseptica and Bbvac were grown in LB media (1 (link)). Details of the clinical strains included in this study are found in Table S2 in the supplemental material.
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