FIG 5.

Stepwise accumulation of paired resistance in Tibetan M. tuberculosis isolates. Numbers of strains with coresistance (a), stepwise coresistance (b), and concurrent coresistance (c) are shown at the top, with the colors of the cells indicating the proportions of strains with coresistance among all the samples. Levin’s attributed risk of the order of occurrence of paired resistance is shown in d, where asterisks denote the that the risk of the indicated order was significantly higher (P < 0.05) than the risk of the opposite order of resistance occurrence.