microbiology lab day 7 part 1 (day 7 bacterial growth curve, conjugation, Lederburg, Tatum, anaerobi
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each chamber in the API 20E system contains
a microtube (the unopened part) and a cupule (the opened part)
What is the API 20E System?
API stands for Analytic Profile Index. It is a standardized, miniaturized version of conventional biochemical procedures used in the identification of Enterobacteriaceae (more than 5500 strains) and other gram negative bacteria ((more than 2300 strains)
what are microorganisms that can only grow in oxygen called?
what are microorganisms that will grow either aerobically (grow faster) or in the absence of o2 (grow slower)?
what are microorganisms that cannot use oxygen but aren't harmed by it, called?
Some microorganisms require only some oxygen. They are harmed by o2 at normal atmospheric tension. What are these called?
Bacteria will grow in the part of the ___ ___ ___ that contains the proper O2 concentration
agar deep culture
What are two convenient ways to culture anaerobic bacteria
cooked meat medium and thioglycollate broth
What method can be used to culture bacteria that are anaerobes but aren't really fastidious anaerobes?
Explain Wright's tube
The anaerobic condition in Wright's tube is created using pyrogallol and NaOH. In the presence of NaOH, pyrogallol is oxidized and removes O2 very effectively in the process. After the anaerobic bacterium has been streaked out on the surface of the agar slant , a cotton plug is trimmed and then pushed into the culture tube until it rests just above the the top of the slant. The space between the top of the cotton plug anbd the open end of the culture tube is then filled with pyrogallol crystals, and 1 mL of 10% NaOH is added. the tube is closed iwth a rubber stopper and is immediately inverted. It is incubated upside down.
What is the last step in the process of wright's tube?
inverting the tube
What would you like to do?
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