Use of a Scanning Electron Microscope for the Examination of Actinomycetes

SUMMARY: Organisms belonging to several genera of the order Actinomycetales were examined using the 'Stereoscan' electron microscope of the Cambridge Instrument Company. Unlike the transmission electron microscope, this instrument provides surface views of fine structures without the need for preparation of replicas. Using a simple preparation procedure, surface views of intact sporing structures of several actinomycetes were observed over a range of magnifications. The potential value of using scanning electron microscopes for the examination of actinomycetes was assessed.