Fig. 2

Tibial bone tissue observed by SEM in the CG and EG. A, B, and C The surface of the bone marrow cavity was uneven, and some cracks were found after alcohol dehydration and drying instrument treatment, but no microbial growth was observed (A × 2500; B × 5000; C × 10,000). D, E, and F: A large number of bacteria were found on the surface of the medullary cavity in a dense or scattered manner with different sizes and shapes. A large number of secretions were attached and wrapped between the microorganisms in the EG (D × 2500; E × 5000; F × 10,000). SEM, scanning electron microscopy; CG, control group; EG, experimental group