Podcast
Questions and Answers
What is the Gram stain characteristic of Clostridium species?
What is the Gram stain characteristic of Clostridium species?
- Gram-negative
- Gram-positive (correct)
- Gram-variable
- Gram-inconclusive
Which test is performed to differentiate Staphylococcus aureus from Staphylococcus epidermidis?
Which test is performed to differentiate Staphylococcus aureus from Staphylococcus epidermidis?
- Coagulase test (correct)
- Catalase test
- CAMP test
- Optochin test
What does MRSA stand for?
What does MRSA stand for?
- Macrolide-resistant Staphylococcus aureus
- Meningitis-resistant Streptococcus aureus
- Multidrug-resistant Staphylococcus aureus
- Methicillin-resistant Staphylococcus aureus (correct)
Which organism is responsible for causing diamond skin disease in pigs?
Which organism is responsible for causing diamond skin disease in pigs?
What type of hemolysis is characterized by clear zones around colonies?
What type of hemolysis is characterized by clear zones around colonies?
Which bacteria are known to thrive in environments without oxygen?
Which bacteria are known to thrive in environments without oxygen?
Which test is used to confirm Streptococcus pneumoniae?
Which test is used to confirm Streptococcus pneumoniae?
What serious condition is primarily caused by Streptococcus agalactiae?
What serious condition is primarily caused by Streptococcus agalactiae?
What pigment is produced by certain strains of Pseudomonas aeruginosa?
What pigment is produced by certain strains of Pseudomonas aeruginosa?
Which organism is known to cause circling disease in ruminants?
Which organism is known to cause circling disease in ruminants?
What is the cause of limberneck in waterfowl?
What is the cause of limberneck in waterfowl?
A common bacterial cause of pulmonary abscesses in foals
A common bacterial cause of pulmonary abscesses in foals
The cause of anthrax is
The cause of anthrax is
Flashcards
Catalase test
Catalase test
A test used to differentiate Staphylococcus and Streptococcus bacteria based on their ability to produce the enzyme catalase.
Alpha hemolysis
Alpha hemolysis
A type of bacterial hemolysis characterized by a partial breakdown of red blood cells, resulting in a greenish discoloration around bacterial colonies on blood agar.
Beta hemolysis
Beta hemolysis
A type of bacterial hemolysis characterized by a complete breakdown of red blood cells, resulting in a clear zone around bacterial colonies on blood agar.
Optochin test
Optochin test
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Streptococcus equi infection
Streptococcus equi infection
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Coagulase test
Coagulase test
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Clostridium botulinum
Clostridium botulinum
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Erysipelothrix rhusiopathia
Erysipelothrix rhusiopathia
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Bacillus anthracis
Bacillus anthracis
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Rhodococcus equi
Rhodococcus equi
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Study Notes
Hemolysis Types
- Three types of hemolysis exist: Alpha, Beta, and Gamma.
Bacterial Identification Tests
- Catalase test: Differentiates Staphylococcus and Streptococcus species.
- Optochin test: Identifies S. pneumoniae.
- CAMP test: Used for S. agalactiae.
- Coagulase test: Identifies Staphylococcus aureus. Incubation in rabbit plasma is needed. Yellow color change indicates S. aureus, while no change indicates S. epidermidis.
Bacterial Species and Diseases
- Pseudomonas aeruginosa: Some strains produce a bluish-green pigment.
- Streptococcus equi: Causes a highly contagious disease affecting the upper respiratory tract and lymph nodes.
- Streptococcus agalactiae: Causes mastitis.
- Clostridium tetani: Causes tetanus.
- Clostridium botulinum: Causes limberneck in waterfowl.
- Erysipelothrix rhusiopathiae: Causes diamond skin disease in pigs.
- Bacillus anthracis: Causes anthrax. Anthrax bacteria survive by forming endospores.
- Rhodococcus equi: A common bacterial cause of pulmonary abscesses in foals.
- MRSA: Methicillin-resistant Staphylococcus aureus.
Bacterial Growth Media
- Staphylococcus spp.: Grow on Blood Agar, Mannitol Salt Agar (MSA), and Nutrient Agar. Do not grow on MacConkey Agar.
- Streptococcus spp.: Grow on Blood Agar and Chocolate Agar. Do not grow on MacConkey Agar.
Clostridium spp. Characteristics
- Gram stain: Gram-positive.
- Oxygen requirements: Obligate anaerobes (thrive in environments without oxygen).
- Survival tactics: Form endospores.
Other Diseases
- Encephalitis: Cause of circling disease in ruminants.
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