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  #1  
Old 09-20-2011
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Default the organism implicated in acne condition

A 14-year-old boy presents with acne with inflamed follicles and sebaceous glands. Gram stain of a pustule from his face reveals pleomorphic gram-positive bacilli. Which of the following is the organism implicated in this condition?

A) C. durum
B) Erysipelothrix rhusiopathiae
C) L. monocytogenes
D) S. aureus
E) S. epidermidis
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  #2  
Old 09-20-2011
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B) Erysipelothrix rhusiopathiae
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  #3  
Old 09-20-2011
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going with B
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Old 09-20-2011
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acne caused by Propionibacterium acnes as i study in step 2 ???????
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Old 09-20-2011
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Originally Posted by miss patho View Post
acne caused by Propionibacterium acnes as i study in step 2 ???????
that is one of the cause of acne.
But what is this organism - B) Erysipelothrix rhusiopathiae?
Never heard this name.
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  #6  
Old 09-20-2011
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Default E.

Quote:
Originally Posted by menatallah Elgohary View Post
A 14-year-old boy presents with acne with inflamed follicles and sebaceous glands. Gram stain of a pustule from his face reveals pleomorphic gram-positive bacilli. Which of the following is the organism implicated in this condition?

A) C. durum
B) Erysipelothrix rhusiopathiae
C) L. monocytogenes
D) S. aureus
E) S. epidermidis
E) S. epidermidis
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  #7  
Old 09-20-2011
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i am going with B too, by ruling out the rest.
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Old 09-21-2011
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Correct Answer the corrrect answer is A > c.durum

first of all i know it is tough mcq but i founded on a website and wanted to share it ,, the correct answer is c.durum ,, many corynebacteria and propionibacteria (anerobes) are members of the normal flora of skin and mucus membranes .C. durum (choice A) is a diphtheroid, a normal flora species that can be opportunistic in the right location, such as hair follicles and sebaceous glands.
E. rhusiopathial (choice B) causes disease in domestic swine. Erysipelas in humans is caused by Group A
streptococci
it can't be E s.epidermidis as the case said that it the organism is gram negative bacilli while S.epidermidis are grame +ve cocci
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  #9  
Old 09-21-2011
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Quote:
Originally Posted by menatallah Elgohary View Post
first of all i know it is tough mcq but i founded on a website and wanted to share it ,, the correct answer is c.durum ,, many corynebacteria and propionibacteria (anerobes) are members of the normal flora of skin and mucus membranes .C. durum (choice A) is a diphtheroid, a normal flora species that can be opportunistic in the right location, such as hair follicles and sebaceous glands.
E. rhusiopathial (choice B) causes disease in domestic swine. Erysipelas in humans is caused by Group A
streptococci
it can't be E s.epidermidis as the case said that it the organism is gram negative bacilli while S.epidermidis are grame +ve cocci
but as I read the question it it says gram positive
Quote:
Originally Posted by menatallah Elgohary View Post
face reveals pleomorphic gram-positive bacilli
?
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Quote:
Originally Posted by menatallah Elgohary View Post
first of all i know it is tough mcq but i founded on a website and wanted to share it ,, the correct answer is c.durum ,, many corynebacteria and propionibacteria (anerobes) are members of the normal flora of skin and mucus membranes .C. durum (choice A) is a diphtheroid, a normal flora species that can be opportunistic in the right location, such as hair follicles and sebaceous glands.
E. rhusiopathial (choice B) causes disease in domestic swine. Erysipelas in humans is caused by Group A
streptococci
it can't be E s.epidermidis as the case said that it the organism is gram negative bacilli while S.epidermidis are grame +ve cocci
Ooo i didnot concentrate on it!
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  #11  
Old 09-22-2011
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Quote:
Originally Posted by DocSikorski View Post
but as I read the question it it says gram positive ?
yes cornybacterium is gram positive rods ,, and c.durum is diphteroid was it is gram positive rod
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