Podcast
Questions and Answers
What is the Gram stain result for Aeromonas?
What is the Gram stain result for Aeromonas?
- Gram-positive
- Gram-negative (correct)
- Gram-variable
- Does not stain with Gram stain
Which bacterial strain produces smooth, convex, translucent colonies?
Which bacterial strain produces smooth, convex, translucent colonies?
- C. mucosalis
- C. fetus subsp. fetus (correct)
- Aeromonas
- Helicobacter spp.
What is the definitive identification test for Campylobacter jejuni?
What is the definitive identification test for Campylobacter jejuni?
- Negative urease activity test
- Negative oxidase test
- Positive hippurate hydrolysis test (correct)
- Negative hippurate hydrolysis test
Which bacterial strain demonstrates 'darting' motility?
Which bacterial strain demonstrates 'darting' motility?
What is the culture medium used for definitive identification of H. pylori?
What is the culture medium used for definitive identification of H. pylori?
Which indirect test can be used to detect the presence of H. pylori?
Which indirect test can be used to detect the presence of H. pylori?
Which characteristic is unique to Pseudomonas stutzeri for differentiating it from other Pseudomonas species?
Which characteristic is unique to Pseudomonas stutzeri for differentiating it from other Pseudomonas species?
What characteristic is common to Pseudomonas mendocina and Pseudomonas pseudoalcaligenes/alciligenes?
What characteristic is common to Pseudomonas mendocina and Pseudomonas pseudoalcaligenes/alciligenes?
What is a distinguishing feature of Pseudomonas mendocina compared to other Pseudomonas species?
What is a distinguishing feature of Pseudomonas mendocina compared to other Pseudomonas species?
What property can be used to differentiate Pseudomonas pseudoalcaligenes from other Pseudomonas species?
What property can be used to differentiate Pseudomonas pseudoalcaligenes from other Pseudomonas species?
Which feature is indicative of Pseudomonas mosellii among the given options?
Which feature is indicative of Pseudomonas mosellii among the given options?
What characteristic of Pseudomonas nonfluorescent group helps in distinguishing it from other Pseudomonas species?
What characteristic of Pseudomonas nonfluorescent group helps in distinguishing it from other Pseudomonas species?
What causes urethritis?
What causes urethritis?
What is the microscopic morphology associated with gonococcal urethritis?
What is the microscopic morphology associated with gonococcal urethritis?
What is the recommended culture medium for identifying Neisseria gonorrhoeae?
What is the recommended culture medium for identifying Neisseria gonorrhoeae?
Which biochemical test is used for definitive identification of Neisseria gonorrhoeae?
Which biochemical test is used for definitive identification of Neisseria gonorrhoeae?
What color change indicates a positive result in the oxidase test for Neisseria gonorrhoeae?
What color change indicates a positive result in the oxidase test for Neisseria gonorrhoeae?
Which of the following is NOT a recommended specimen for direct microscopic examination?
Which of the following is NOT a recommended specimen for direct microscopic examination?
Flashcards
Aeromonas Gram stain
Aeromonas Gram stain
Gram-negative
C. fetus subsp. fetus colonies
C. fetus subsp. fetus colonies
Smooth, convex, translucent colonies
Campylobacter jejuni identification
Campylobacter jejuni identification
Positive hippurate hydrolysis test
Campylobacter motility
Campylobacter motility
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H. pylori identification medium
H. pylori identification medium
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H. pylori detection (indirect)
H. pylori detection (indirect)
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Pseudomonas stutzeri colony
Pseudomonas stutzeri colony
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Pseudomonas mendocina/pseudoalcaligenes/alciligenes
Pseudomonas mendocina/pseudoalcaligenes/alciligenes
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Pseudomonas mendocina feature
Pseudomonas mendocina feature
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Pseudomonas pseudoalcaligenes/alciligenes trait
Pseudomonas pseudoalcaligenes/alciligenes trait
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Pseudomonas mosellii growth
Pseudomonas mosellii growth
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Pseudomonas nonfluorescent group
Pseudomonas nonfluorescent group
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Urethritis cause
Urethritis cause
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Gonococcal urethritis morphology
Gonococcal urethritis morphology
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Neisseria gonorrhoeae culture
Neisseria gonorrhoeae culture
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Neisseria gonorrhoeae identification test
Neisseria gonorrhoeae identification test
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Oxidase Test positive color
Oxidase Test positive color
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Inappropriate specimen for direct microscopic exam
Inappropriate specimen for direct microscopic exam
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Study Notes
Gram Stain and Identification
- Aeromonas results in a Gram-negative stain.
- Campylobacter jejuni is definitively identified using the oxidase test.
- A bacterial strain producing smooth, convex, translucent colonies is typically associated with Staphylococcus aureus.
- 'Darting' motility is exhibited by Campylobacter species.
Culture Media and Tests
- The culture medium for identifying Helicobacter pylori is typically Campylobacter blood-free selective media.
- Indirect tests for detecting Helicobacter pylori presence include serological tests for antibodies.
- Neisseria gonorrhoeae is identified using Thayer-Martin agar.
Pseudomonas Characteristics
- Pseudomonas stutzeri is uniquely differentiated by its ability to produce yellow colonies and its negative reaction to oxidase.
- Pseudomonas mendocina and Pseudomonas pseudoalcaligenes/alcaligenes are commonly characterized by their greenish pigmentation on culture.
- Pseudomonas mendocina is distinguished by its production of a specific brown pigment.
- Pseudomonas pseudoalcaligenes can be differentiated by being nitrate-reducing.
- Pseudomonas mosellii is noted for its ability to produce a sweet odor.
Urethritis and Gonorrhea
- Urethritis can be caused by various pathogens, including Neisseria gonorrhoeae.
- Microscopic morphology in gonococcal urethritis reveals Gram-negative diplococci within neutrophils.
- The recommended culture medium for Neisseria gonorrhoeae is Chocolate agar.
- The oxidase test for Neisseria gonorrhoeae shows a color change to dark purple for a positive result.
- Specimens not recommended for direct microscopic examination include throat swabs.
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Description
Test your knowledge on identifying bacteria based on colony morphology characteristics such as color, shape, and texture. Questions cover different types of colonies produced by bacteria like runny, spreading, and pigmented colonies.
