This is how a hanging-drop slide is prepared. Figure from Macedo, Wikimedia Commons, 2016. 2 3 4 slide cover slip vaseline concavity drop of microbiological culture CA inoculation loop 11. Which slide gives you more information, the hanging drop or the stained slide? Why do you say so? 12. Why might it be valuable to know whether a bacterium is motile?
Microscopic examination
The analysis of minute organisms, cellular organization of any biological structure, and composition of body fluids with the help of a microscope is known as microscopic examination. The magnification of specimens or samples under study helps in attaining a clearer picture of it.
Gram Staining
Named after Hans Christian Gram, a Danish bacteriologist, Gram stain is one of the most powerful staining techniques within microbiology. This technique was introduced in 1882 to identify pneumonia-causing organisms. The Gram staining technique uses crystal violet or methylene blue as primary staining colors to distinguish gram-positive from gram-negative organisms. Under a microscope, the gram-positive organisms appear purple-brown, retaining the primary color. Gram-negative organisms appear pink or red as they do not acquire the color of the primary stain.
Trending now
This is a popular solution!
Step by step
Solved in 4 steps
