Fig 4. Immunoelectron microscopy of the merogony stage of N. bombycis in the infected silk glands of silkworms.

N. bombycis-infected silkworm silk glands were isolated, fixed, embedded, ultrathin sectioned, and labeled with mAb 2B10 and 10 nm colloidal gold conjugated-secondary antibody. A, EOB13320 (black arrow) is observed in the sporoplasm of the meronts. B-G, There are numerous gold labels (black arrows) in the sporoplasm of the cells in transition from meront to sporont during merogony. Bars = 0.5 μm.