FIG. 4.

Susceptibility of P. aeruginosa to multiple donors’ nasal fluids. Activities of multiple donors’ nasal secretions were tested individually against two strains of P. aeruginosa. Different donors’ fluids were tested in a CFU microassay against a cystic fibrosis clinical isolate (A) and the wild-type strain H103 (B). Init, inoculum (input) at time zero for each donor tested, without the addition of nasal fluid. Asterisks indicate n = 1, due to scant fluid from the indicated donors.