
Virtual Lab 2
Parts of the Microscope
Labelled Leica Microscope Parts
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Gram Stain
Gram Stain
- organism: Escherichia coli
- reaction: gram negative
- morphology/arrangement: short bacillus, mostly single
Gram Stain
- organism: Bacillus cereus
- reaction: Gram positive
- morphology/arrangement: streptobacilli
Special Stains
Special Stains: Acid-fast stain, demonstrating Mycobacterium
Organism: Mycobacterium smegmatis
Mycobacterium smegmatis detected in a respiratory exudate (pus sample) as the broad clump of tiny, fuchsia-pink rods.
Note: the dark blue rods are other bacteria present in the sample
Special Stain: Flagella stain demonstrating amphitrichous arrangement
Organism: representative bacteria
Polar amphitrichous arrangement: yellow arrowsindicate the two flagella of this organism, one at each end