media Flashcards
1
Q
Baird-Parker
A
- isolates Staphylococcus aureus
- has sodium pyruvate to protect damaged cells
2
Q
Nutrient Agar
A
- suitable for nonspecific organisms
- has application good for maintenance and teaching
3
Q
Sabouraud
A
- dermatophytes, fungi, yeasts
- acidic
4
Q
MRS
A
- deMan Rogosa Sharpe
- lactobacilli
5
Q
HHD
A
- homofermentative-heterofermentative differential
- homo = lactobacilli
- hetero = streptococci
- bromocresol green as pH indicator (homo makes more acidic and turns green)
6
Q
OGYE
A
- oxytetracycline glucose yeast extract agar
- yeast and mold
- oxytetracycline = selective agent
- neutral pH + oxytetracycline increase yeast counts
7
Q
ADPA
A
- acidified dextrose potato agar
- yeast & mold in dairy products
- potato = happy fungi growth
- dextrose = growth stim
- tartaric acid = lowers pH to 3.5 and inhibits bacterial growth
8
Q
PALCAM
A
- listeria monocytogenes
- has lithium chloride, ceftazidime, polymyxin B, acriflavine hydrochloride
- listeria colonies are gray-green with black precipitate
- ferments mannitol = yellow halo
- others = brown-green halo
9
Q
MHA
A
- Muller Hinton Agar
- antimicrobial susceptibility testing
- nonselective/nondifferential
- has starch to absorb bacterial toxins
- loose to promote diffusion of antibiotics
10
Q
TSA
A
- Tryptic Soy Agar
- general growth media
- soybean meal, casein, and NaCl
- salt can be used to determine halotolerance
11
Q
plate count agar
A
- used for total viable growth
- not selective
12
Q
dextrose tryptone broth
A
- looks for spoilage organisms in low and medium acid canned foods (Bacillus)
- aerobic cultivation
- positive test turns yellow from purple
13
Q
liver broth
A
- contains liver particles
- grows saccharolytic, putrefactive mesophilic, and thermophilic anaerobes
- positive growth signs = increased turbidity or pushed up agar plug
