The Gram Stain
This is an excerpt from the paper...
1. The Gram stain is named for the Danish bacteriologist who first devised it in 1844 (History, 2004). It is usually the first test used to identify bacteria. The Gram stain is based on the ability of bacterial cell walls to retain crystal violet dye during solvent treatment. Bacterial cells with walls containing small amounts of peptidoglycan and lipopolysaccharide are Gram-negative; those containing relatively high amounts of peptidoglycan and lipopolysaccharide are Gram-positive (The Gram, 2004). Microorganisms which retain the crystal violet-iodine complex appear purple-brown under the microscope, and are considered Gram-positive. Those which do not retain the stain appear red and are considered Gram-negative. An example of a Gram-positive bacterium is Staphylococcus aureus. An example of a Gram-negative organism is Salmonella typhii. The Gram stain is carried out on a smear of the sample containing the bacteria (History, 2004; The Gram, 2004). The steps are: 1. Prepare a smear by placing one drop of the bacterial culture on a glass slide and smear it onto the slide using a wooden stick or by
. . .
Some common words found in the essay are:
Gram-positive Gram, Bacteria Mycobacterium, , References Characteristics, gram stain, Textbook Microbiology, cell walls, 2004 retrieved, air dry, crystal violet, gram 2004, eukaryotic cells, stain 2004 retrieved, cell walls contain, 10 60, amounts peptidoglycan, gram stain 2004, stand 10, amounts peptidoglycan lipopolysaccharide, stand 10 60,
Approximate Word count = 752
Approximate Pages = 3 (250 words per page)
More Essays on The Gram Stain
|
Customer Service
to Over
32,000 Professionally Written Papers!!!
