ATE 2639 Exam 3 Ch 41-43 Questions & Answers 2024/2025
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Course
ATE 2639
Institution
ATE 2639
ATE 2639 Exam 3 Ch 41-43 Questions & Answers 2024/2025
Blood agar - ANSWERS- Grows both gram-positive and gram-negative
- Selection of colonies is preferable
MacConkey agar - ANSWERS- Gram-positive organisms do not grow
- May inhibit growth of potentially pathogenic bacteria
Quadrant S...
ATE 2639 Exam 3 Ch 41-43 Questions &
Answers 2024/2025
Blood agar - ANSWERS- Grows both gram-positive and gram-negative
- Selection of colonies is preferable
MacConkey agar - ANSWERS- Gram-positive organisms do not grow
- May inhibit growth of potentially pathogenic bacteria
Quadrant Streaking Method - ANSWERSDesigned to aid in isolation of pure bacterial cultures
Can pathogen invade internal organs ? - ANSWERSYes
Best temp to incubate - ANSWERS37 degrees Celsius
Incubation time depends on ... - ANSWERS- Generation time of spp
- Type of medium
Common incubation time? - ANSWERS48 hours w/ exams at 18-24 hrs
How should plates be stored? - ANSWERSInverted to prevent condensation
What is used for pathogens that need CO2? - ANSWERSCandle jar
Does the candle jar cause an anaerobic condition? - ANSWERSNo
What is done if results are negative? - ANSWERSRetry
, Colony characteristics - ANSWERS- Size
- Pigment
- Density
- Elevation
- Form
- Texture
- Odor
- Hemolysis
Antimicrobial sensitivity - ANSWERSPerformed to determine the susceptibility or resistance to specific
antimicrobial drugs
Most commonly used antimicrobial sensitivity test ? - ANSWERSagar diffusion test
Agar diffusion test - ANSWERS- Uses paper disks impregnated with antimicrobials
- Quantitative and requires the measurement of inhibitory zone sizes
Agar diffusion test types - ANSWERS- Modified Kirby Bauer
- Minimum inhibitory concentration (MIC)
Inhibitory zone sizes - ANSWERSGives an estimate of antimicrobial sensitivity susceptibility
Modified Kirby-Bauer technique - ANSWERS- U.S. Food and Drug Administration method
- International collaborative study
Minimum inhibitory concentration (MIC) - ANSWERS- The smallest concentration that can inhibit growth
- Disks with varying concentrations
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