All the bacterias are colorless and have some refractive index to the aqueous salt present in the surrounding.So it is difficult to observe structural details until the microscope is optimally adjusted.To overcome this problem the bacterias are colored with stains....
Antony van Leewenhoek (1632-1723): 1677: First scientist who observed bacteria and other microorganisms using home a single lens microscope constructed by him and he named those organisms as “Little animalcules”. This microscope could magnify up to 266 times....
Family Enterobacteriaceae Gram – negative rods up to 3 μ m in length,oxidase – negative, have peritrichous flagella non – sporing Grow well on MacConkey agar because they are not inhibited by the bile salts in the medium Mostly strains are...
