(I) Bacterial colonies from nonadhesive subgingival plaque (BHI blood agar, stereomicroscope). (H) Bacterial colonies from gingival margin sample (BHI blood agar, stereomicroscope). (G) Bacterial colonies from saliva sample (BHI blood agar, stereomicroscope). (F) Candida albicans colonies (BHI blood agar, stereomicroscope). (E) α-hemolytic colonies of Streptococcus gordonii (BHI blood agar, stereomicroscope). (D) Diffusively growing colonies of Capnocytophaga sputigena (BHI blood agar, stereomicroscope). (C) Characteristic colonies of saliva bacteria a: Prevotella oris (pink colonies) b: Actinomyces odontolyticus (red colonies) (BHI blood agar, anaerobic culture for 48 h, stereomicroscopy). (B) Isolated bacteria from dental plaque sample a: Actinomyces israelii colonies b: Fusobacterium nucleatum colonies (BHI blood agar, anaerobic culture for 48 h, stereomicroscopy). Now that we have examined the basic concepts of microscopy, we survey the various categories of light microscopy and why each may be particularly useful for a given experiment.įigure 2.22. Therefore, a stereomicroscope is useful for examining gross neural structures, while a compound microscope is better for examining microscopic structures such as single neurons or fiber tracts. The ocular lenses of a stereomicroscope are usually fixed at 10× and the objective lenses typically range from 0.1 to 8×. Second, the magnification power of a stereomicroscope is often less than that of a compound microscope. This makes stereomicroscopes useful for looking at specimens too thick for light to pass through. First, stereomicroscopes typically use light that is reflected off a specimen, while compound microscopes often use light transmitted through a specimen.

In addition to the appearance of the specimen, there are at least two other major differences between a stereomicroscope and a compound microscope.

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