Midterm/lab6

Question 0

Temperature classification
Ps. fluorescens
E.coli
B.stearothermophilis

Answer 0

Temperature classification
Ps. fluorescens-psychrotroph
E.coli-mesophile
B.stearothermophilis-thermophile

Question 1

Aerotolerance classification:
M.luteus
E.coli
C.sporogenes

Answer 1

Aerotolerance classification:
M.luteus-obligate aerobe
E.coli-facultative anaerobe
C.sporogenes-obligate anaerobe

Question 2

Standard plate count OCD=

Answer 2

Colonies counted (CFU)/dilution factor (mL)

Question 3

Disinfectant

Answer 3

Used on inanimate surfaces, strongest concentration

Question 4

Antiseptic

Answer 4

Used on living tissues, weakest concentration

Question 5

Can the same chemical be a antiseptic and a disinfectant?

Answer 5

Yes

Question 6

Longest wavelength 315-400nm

Answer 6

UV-A

Question 7

Most detrimental wavelength to bacteria

Answer 7

UV-C (100-280nm)

Question 8

Antimicrobrial susceptibility test

Answer 8

Kirby-Bauer

Question 9

Natural anti microbial agents produced by microorganisms

Answer 9

Antibiotics

Question 10

Medium for Kirby Bayer test

Answer 10

Mueller-Hinton agar

Question 11

Broth culture density based on

Answer 11

McFarland standards

Question 12

Interpretation of Kirby-Bauer test is to determine if microbe is

Answer 12

Susceptible, resistant, or intermediate to the antibiotic

Question 13

McFarland standards are used as a way to determine

Answer 13

Cell density based on turbidity