Figure 4.
Lung colonization by B. pertussis BPLC9 in coinfection. Balb/c mice were infected intranasally with ∼104 CFU of B. pertussis BPLC9 (SphB1−; black bars), or coinfected with 104 CFU of B. pertussis BPLC9 and 106 CFU of B. pertussis BPDR (FHA− SphB1+). The white bars represent the numbers of CFU of BPLC9 (as distinguished by their resistance to gentamycin) in the lungs of coinfected mice, and the striped bars represent the numbers of BPDR in the coinfected mice.