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. 2015 Mar 20;10(3):e0121661. doi: 10.1371/journal.pone.0121661

Fig 3. Changes in relative virulence.

Fig 3

Relative virulence of different strains cultured in cell-based and cell-free systems expressed as the relative spleen weight per number of C. burnetii. E1, experiment 1; E2, experiment 2.