Term
| Some Bacteriodes species have been reclassified into what 3 genus'? |
|
Definition
1. Tannerella
2. Porphyromonas
3. Prevotella |
|
|
Term
| Black Pigmenting bacteria are Gram ____ |
|
Definition
|
|
Term
| What form of metabolism is employed by Black Pigmenting Bacteria? |
|
Definition
|
|
Term
| True or false: Black Pigmenting Bacteria are motile. |
|
Definition
| FALSE: Black Pigmenting Bacteria are NON-MOTILE |
|
|
Term
| True or False: Black Pigmenting Bacteria are non-spore forming |
|
Definition
|
|
Term
| What role does Black Pigmenting Bacteria have in the mouth? |
|
Definition
**Important in Oral infections
***Play major roles in the pathenogenisis of both:
1. periodontal disease
2. endodontic infections |
|
|
Term
| What are the 2 areas other than the mouth that Black Pigmenting bacteria are usually found to cause infections? |
|
Definition
|
|
Term
| Where is Black Pigmenting most commonly found as normal flora? |
|
Definition
1. Oral Cavity
2. G.I. Tract |
|
|
Term
| True or False: Bacteroides fragilis is a black- pigmenting bacteria. |
|
Definition
| False: Bacteroides Fragilis is NOT a black-pigmenting bacteria, but is a commonly isolated human pathogen causing anaerobic infections. |
|
|
Term
| Bacteroides fragilis causes infections due to what bacterial metabolic pathway? |
|
Definition
|
|
Term
| True or False: Bacteroides fragilis is NOT able to tolerate prolonged exposure to oxygen. |
|
Definition
| FALSE: Bacteroides fragilis IS ABLE to tolerate prolonged exposure to oxygen |
|
|
Term
| What conditions predispose a person to infections of Bacteroides fragilis? |
|
Definition
| conditions predisposing to anaerobic infection |
|
|
Term
| How does Bacteroides fragilis respond to antimicrobial agents? |
|
Definition
| Bacteroides fragilis is the most resistant of all anaerobes to antimicrobial agents |
|
|
Term
| Where is the most common place of infection caused by Bacteroides fragilis? What is it a result of? |
|
Definition
a. Common infections are intra-abdominal and oral
b. intra-abdominal infections are usually the result of fecal material spilled into the peritoneal cavity during surgery, bowel disease, or cancer |
|
|
Term
| True or False: Bacteriodes Fragilis is endogenous. |
|
Definition
|
|
Term
| What are the areas of the body where Bacteroides fragilis can be found? |
|
Definition
1. oral cavity
2. G.I. tract
3. vagina
4. Urethra |
|
|
Term
| What are the symptoms of an infection caused by Bacteroides Fragilis? |
|
Definition
1. resembles other anaerobic infections
2. foul odor of discharge
3. tissue necrosis
4. gas |
|
|
Term
| How is an infection caused by Bacteroides Fragilis diagnosed? |
|
Definition
1. Gram stain
2. biochemical i.d. |
|
|
Term
| How is an infection caused by bacteroides fragilis treated? |
|
Definition
| surgical therapy: drainage, excision of necrotic tissue, resection of infected veins |
|
|
Term
| True or False: Bacteroides fraglis produces Beta Lactamase. |
|
Definition
|
|
Term
| Tannerella forsynthesis was reclassified in 2002. How was it previously classified? |
|
Definition
| Tannerella forsynthesis is formerly Bacteroides forsythus |
|
|
Term
| Tannerella forsynthensis is Gram_____ |
|
Definition
|
|
Term
| What form of metabolism does Tannerella forsynthesis employ? |
|
Definition
|
|
Term
| Where in dentistry is Tannerella forsynthesis most often seen? |
|
Definition
1. High numbers found in gingival crevice.
2. creates a periodontal pocket, which leads to bone and attachement loss.
3. May also cause abscesses of the periodontium. |
|
|
Term
| Where is Tannerella forsythesis usually found in the mouth? |
|
Definition
1. SUBgingival and SUPRAgingival BIOFILMS
2. tongue
3. buccal mucosa
4. saliva |
|
|
Term
| Where are the sites in the mouth that house bacteria speculated to serve as reservoirs for re-colonization of the gingival crevice after periodontal treatment? |
|
Definition
1. subgingival and supragingival areas
2. tongue
3. buccal mucosa
4. saliva |
|
|
Term
| What are the 3 former Bacteroides species that now are found in the porphyromonas genus? |
|
Definition
1. P. gingivalis
2. P. endodontalis
3. P. asaccharolytica |
|
|
Term
| What is the G+C content for the Porphyromonas species? |
|
Definition
|
|
Term
| What is the G+C content for Bacteroides? |
|
Definition
|
|
Term
| Porphyromonas are gram _____ |
|
Definition
|
|
Term
| What form of metabolism does the Porphyromonas genre employ? |
|
Definition
|
|
Term
| True or False: Porphyromonas gingivalis cannot tolerate any exposure to oxygen |
|
Definition
| False: Porphyromanas gingivalis can tolerate BRIEF exposure to oxygen |
|
|
Term
| What oral infections are associated with Porphyromonas gingivalis? |
|
Definition
| aggressive periodontitis and periodontal abscesses |
|
|
Term
| Porphyromonas gingivalis is found in what areas of the mouth, and what is its function in those areas? |
|
Definition
Found in:
1. Subgingival and supragingival biofilms
2. tongue
3. buccal mucosa
4. saliva
***Serves as a reservoir for re-colonization of the gingival crevice after periodontal treatment |
|
|
Term
| What are the suspected virulence factors of Porphyromonas gingivalis? |
|
Definition
1. fimbriae
2. capsules
3. collagenase
4. hyaluronidase
5. phospholipase
6. hemolysins
7. keratinases
8. endotoxin |
|
|
Term
| What species of bacteria does P. gingivalis interact with in plaque? |
|
Definition
| Fusobacterium nucleatum and Treponema species |
|
|
Term
| What form of infections does Porphymonas endodontalis most frequently cause? |
|
Definition
| most frequently associated with endodontic lesions |
|
|
Term
| True or False: Porphyomonas endodontalis cannot tolerate any oxygen. |
|
Definition
| True: it is a strict anaerobe. |
|
|
Term
| What abilities does porphyromonas endodontalis have that it uses in the pathogensis of endodontic disease? |
|
Definition
Involvement in the pathogenesis of endodontic disease may involve its ability to
1. degrade collagen
2. has a proteolytic activity |
|
|
Term
| What 3 species of the Prevotella genus were previously classified under the Bacteriodes species? |
|
Definition
1. Prevotella intermedia
2. Prevotella melaninogenica
3. Prevotella loeschii |
|
|
Term
| Bacteria of the Prevotella genre are Gram _____ |
|
Definition
|
|
Term
| What form of metabolism does the Prevotella genre use? |
|
Definition
|
|
Term
| What infections does Prevotella intermedia usually cause? |
|
Definition
1. moderate-to-severe gingivitis
2. necrotizing ulcerative gingivitis
3. chronic periodontitis
4. periodontal abscess |
|
|
Term
| What are the potential virulence factors of Prevotella intermedia? |
|
Definition
1. capsules
2. fimbriae
3. alkaline phosphates
4. endotoxin |
|
|
Term
Prevotella intermedia is a
a. late colonizer?
OR
b. early colonizer |
|
Definition
|
|
Term
| What other bacteria does Prevotella intermedia interact with in plaque? |
|
Definition
| Fusonacterium nucleatum (Late Colonizers) |
|
|
Term
What bacteria is potentially the etiologic agent of oral disease?
(Etiology = study of causation/origination) |
|
Definition
| Prevotella melaninogenica |
|
|
