Once colonies have been cultured and isolated, Trace Analytics is able to do perform the Gram’s staining procedure for bacterial classification. Gram’s stain, accidentally discovered in 1884, is still one of the quickest and most accurate ways of microbial identification. Under a light microscope, bacteria are generally easily identifiable as positive or negative species. When bacteria have a cell wall (the layer around the bacteria that keeps the genetic information inside the cell), the bacteria is stained purple and designated as Gram-positive. If the cell wall layer is thin, the bacteria are stained pink and classified as Gram-negative. Gram-negative bacteria are generally more resilient against antibiotics than gram-positive bacteria due to a specific type of sugar component on the outside of the cell wall that prevents certain drugs and antibiotics from entering its cell wall.
HOW MICROORGANISMS MOVE
Most bacteria will look either look rod-shaped or round, known as cocci and are able to move in a variety of ways such as swimming, gliding, floating, and swarming, meaning individual bacteria move in sync to towards a common direction, dictated by its drive for optimal living conditions. Movement can be aided by a whip-like tail(s) called flagella and used as a propeller. Pili, which are hair-like arms on certain bacterial species can also aid in movement. Molds can produce lightweight spores that are released in the air to be transported in new locations. Cytokinesis and binary fission, two different forms of cell division, are also considered as modes of transportation in microbes.