Figure 3

Persistence of human and ovine B. parapertussis in the sheep nasal cavity. Bars represent the number of sheep in each of three inoculation groups with positive nasal swab cultures of B. parapertussis (ov, ovine strain; hu, human strains; mix, 200:1 mixture of human and ovine strain). Plain bars indicate animals with low bacterial loads (<100 colonies); hatched bars indicate those with high bacterial loads. Half the animals were sacrificed at day 7 and half at day 14 post-inoculation.