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Murine nasal cavity flora inhibits Bordetella pertussis growth. B. pertussis was grown alone (star) or cocultured with either Staphylococcus saprophyticus (cross), Staphylococcus xylosus (circle), Staphylococcus lentus (line), Rhizobium (square), Kytococcus (diamond), or Klebsiella PAMU (triangle) in Stainer-Scholte media for 32 hours, and surviving B. pertussis colony-forming units (CFU) were determined by plating on Bordet-Gengou agar with 60 ng/mL streptomycin. *P > 0.05.
