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bacitracin on blood agar

bacitracin on blood agar

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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What are the results from these two tests? (catalase and bacitracin) 

 

### Image Transcription for Educational Website The image displays two tests used for bacterial identification and antimicrobial susceptibility: 1. **Catalase Test Result:** - This section shows the result of a catalase test. A positive catalase result is indicated by the presence of bubbles, which signifies the release of oxygen gas. This test is used to identify organisms that produce the enzyme catalase, commonly used to differentiate between bacterial species, particularly Gram-positive cocci. 2. **Bacitracin Test on Blood Agar:** - The second section shows a petri dish containing blood agar with a clear area labeled "B." This demonstrates a bacitracin susceptibility test. A zone of inhibition around the "B" indicates that the organism is susceptible to bacitracin. Blood agar is used as a nutrient-rich medium to grow a variety of bacteria and observe hemolytic activity. The presence of an inhibition zone is critical for identifying specific bacterial isolates, such as differentiating between Beta-hemolytic Streptococci. The tests depicted are fundamental in microbiology for differentiating and identifying bacteria based on their biochemical and susceptibility characteristics.
Transcribed Image Text:### Image Transcription for Educational Website The image displays two tests used for bacterial identification and antimicrobial susceptibility: 1. **Catalase Test Result:** - This section shows the result of a catalase test. A positive catalase result is indicated by the presence of bubbles, which signifies the release of oxygen gas. This test is used to identify organisms that produce the enzyme catalase, commonly used to differentiate between bacterial species, particularly Gram-positive cocci. 2. **Bacitracin Test on Blood Agar:** - The second section shows a petri dish containing blood agar with a clear area labeled "B." This demonstrates a bacitracin susceptibility test. A zone of inhibition around the "B" indicates that the organism is susceptible to bacitracin. Blood agar is used as a nutrient-rich medium to grow a variety of bacteria and observe hemolytic activity. The presence of an inhibition zone is critical for identifying specific bacterial isolates, such as differentiating between Beta-hemolytic Streptococci. The tests depicted are fundamental in microbiology for differentiating and identifying bacteria based on their biochemical and susceptibility characteristics.
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