1.03 - Bacteriology Flashcards
In streak plating, the primary streak is used to determine if we are dealing with a ___
Pure culture, or mixed culture
In streak plating, the secondary and tertiary streaks are used to determine if we are dealing with ___
light, moderate, or heavy growth (if still present in the tertiary streak, then, it is considered as heavy growth)
Mesophillic bacteria grow at what temperature?
37 degrees celcius
Why does the hypothalamus set a higher body temperature in the presence of infection?
To prevent further growth of mesophillic bacteria
Using the catalase test, how is streptococcus differentiated from staphylococcus?
Staphylococcus will produce bubbles when hydrogen peroxide is added
Using the coagulase test, how is staph aureus differentiated from other staphylococcus?
Staph aureus will form clots
What is the manner of division of bacteria?
Simple binary fission
The outer membrane of the gram-negative cell wall has ___ which are special channels that permit passive diffusion of low-molecular weight hydrophilic compounds
Porins
The space between the outer and inner membrane of the gram negative cell wall is called ___
Periplasmic space
The peptidoglycan in the gram-negative cell wall is contained in the __
Periplasmic space
Endotoxins are found only in gram-___ bacteria
Gram-negative bacteria
The McConkey Agar only allows the growth of ___ bacteria; and also differentiates ____ from ___
Gram-negative bacteria
Lactose fermenters from non-lactose fermenters
What are the only two geniuses that have spores?
genus Bacillus and genus Clostridium
___ is a protective mechanism triggered by near depletion of any of several nutrients or when the environment becomes unfavorable
Sporulation
___ are extrachromosomal genetic subunits which are responsible for disease prolongation, recurrence, and resistance
Plasmids
