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Dental Bacteriology Exam 1
Lactobacillus
12
Biology
Graduate
08/31/2009

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Cards

Term
Lactobacillus is part of the normal flora in what organs?
Definition

1. mouth

2. GI tract

3. female genital tract

Term
Infections due to lactobacillus are _______ .(common or rare)
Definition
infections are rare
Term
How is lactobacillus found in dentistry?
Definition

found in

1. smooth surface caries

2. carious lesions that have progressed into the dentin

3. root caries

Term
What are the common species of lactobacillus found in the oral cavity?
Definition
L. acidophilus and L. casei
Term
Morphology of Lactobacillus:
Definition

1. Gram +

2. long chaining rods, coccobacilli, and spiral forms

Term
What is the form of metabolism used by lactobacillus?
Definition
facultative anaerobe--produces lactic acid from sucrose
Term
True or false: lactobacillus is acidogenic.
Definition
true
Term
What is the optimal pH for lactobacillus
Definition
optimal pH is 3.5-4.5 (aciduric)
Term
Lactobacillus are important ______ agents in dental caries
Definition
secondary agents
Term
When do lactobacillus begin to form in dental caries?
Definition
They are secondary agents following blooms of Streptococcus mutans
Term
What are the clinical manifestations (other than in dentistry) for lactobacillus?
Definition

1. bacteremia

2. endocarditis (not commonly)

Term
Where do lactobacillus usually originate from in the body?
Definition
genitourinary tract and orally
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