Q. What is a common laboratory method to identify Actinomycetes?
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A.
Gram staining
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B.
Acid-fast staining
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C.
Culture on blood agar
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D.
PCR amplification
Solution
Gram staining is commonly used to identify Actinomycetes, which are typically Gram-positive.
Correct Answer:
A
— Gram staining
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Q. What is the primary characteristic of Actinomycetes?
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A.
They are spore-forming bacteria.
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B.
They are filamentous and resemble fungi.
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C.
They are strictly aerobic organisms.
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D.
They are always pathogenic.
Solution
Actinomycetes are filamentous bacteria that resemble fungi in their growth pattern.
Correct Answer:
B
— They are filamentous and resemble fungi.
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Q. What is the primary treatment for infections caused by Actinomyces?
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A.
Antifungal medications
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B.
Antibiotics
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C.
Surgery
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D.
Vaccination
Solution
Infections caused by Actinomyces are primarily treated with antibiotics.
Correct Answer:
B
— Antibiotics
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Q. What is the typical oxygen requirement for Actinomyces species?
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A.
Obligate aerobes
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B.
Facultative anaerobes
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C.
Obligate anaerobes
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D.
Microaerophilic
Solution
Actinomyces species are facultative anaerobes, meaning they can grow in both the presence and absence of oxygen.
Correct Answer:
B
— Facultative anaerobes
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Q. What type of environment do non-sporing anaerobes typically thrive in?
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A.
High oxygen environments
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B.
Low pH environments
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C.
Anaerobic environments
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D.
Saline environments
Solution
Non-sporing anaerobes thrive in anaerobic environments where oxygen is absent.
Correct Answer:
C
— Anaerobic environments
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Q. Which genus of Actinomycetes is known for producing antibiotics?
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A.
Streptomyces
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B.
Nocardia
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C.
Corynebacterium
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D.
Bifidobacterium
Solution
The genus Streptomyces is well-known for its ability to produce a variety of antibiotics.
Correct Answer:
A
— Streptomyces
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Q. Which of the following is a common disease caused by Actinomyces species?
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A.
Tuberculosis
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B.
Actinomycosis
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C.
Botulism
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D.
Tetanus
Solution
Actinomyces species are known to cause actinomycosis, a chronic infection.
Correct Answer:
B
— Actinomycosis
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Q. Which of the following is a common non-sporing anaerobe found in the human mouth?
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A.
Clostridium
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B.
Bacteroides
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C.
Fusobacterium
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D.
Staphylococcus
Solution
Fusobacterium is a common non-sporing anaerobe found in the human oral cavity.
Correct Answer:
C
— Fusobacterium
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Q. Which of the following is a risk factor for infections caused by non-sporing anaerobes?
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A.
High blood pressure
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B.
Poor oral hygiene
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C.
Regular exercise
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D.
Low cholesterol diet
Solution
Poor oral hygiene is a significant risk factor for infections caused by non-sporing anaerobes.
Correct Answer:
B
— Poor oral hygiene
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Q. Which of the following is NOT a characteristic of non-sporing anaerobes?
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A.
They do not form spores.
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B.
They can ferment carbohydrates.
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C.
They require oxygen for growth.
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D.
They are often found in the human gut.
Solution
Non-sporing anaerobes do not require oxygen for growth; they thrive in its absence.
Correct Answer:
C
— They require oxygen for growth.
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