FIG 4 .

Differential growth of MTBC strains in human bronchoalveolar cells. Cells isolated from bronchoalveolar lavage of healthy donors were infected with the indicated strains of different lineages of the MTBC with an MOI of 1:1 for 4 h and 7 days. Quantification of viable CFU at 4 h and 7 days postinfection was conducted by lysis of monolayers, serial dilution, and plating on 7H10 medium. Error bars indicate standard deviations for two independent experiments performed with cells from different donors, each consisting of two technical replicates per strain.