Fig. 2.

Infected mandibular muscle demonstrates evidence of damage to z-lines. Transmission electron microscopy (TEM) analysis of control (n=3) and O. kimflemingiae-infected muscle (n=3). (A) Control ants demonstrate the presence of healthy, regularly spaced sarcomeres (S) as evidenced by long, connected parallel z-lines (arrowheads) through the muscle cell. Large mitochondria (M) are present throughout each muscle cell. Scale bar: 5 µm. (B,C) Infected muscle demonstrates extensive sarcomere disruption including z-line damage, either in a hypercontracted, swollen state (B, arrowheads) or with a broken, non-uniform appearance (C, arrowheads). The presence of multiple double-membraned bodies (B, arrows) is also evident. Scale bars: B, 5 µm; C, 1 µm.