Term
|
Definition
| bacteria that grow and live in the presence of oxygen |
|
|
Term
|
Definition
| bacteria that grow and live in the absence of oxygen |
|
|
Term
|
Definition
microorganism that can grow in the absence of oxygen but is not harmed if oxygen is present.
|
|
|
Term
|
Definition
| an organism that is normally anaerobic but can grow in the presence of oxygen |
|
|
Term
|
Definition
| a substance that promotes the growth of organisms |
|
|
Term
|
Definition
| an organism that cannot grow without the presence of oxygen |
|
|
Term
|
Definition
| an organism that cannot grow in the presence of oxygen. |
|
|
Term
|
Definition
| an enzyme that promotes the splitting of proteins. |
|
|
Term
|
Definition
| the anaerobic enzymatic conversion of carbohydrates to simpler compounds |
|
|
Term
|
Definition
| a term used to refer to lipopolysaccharide (LPS) of the cell membrane of gram-negative bacteria. |
|
|
Term
|
Definition
| A toxin that is released from within gram negative bacteria and has an impact from a distance. |
|
|
Term
|
Definition
| Programmed cell death that is dictated by the nuclei when age, state of cell health or condition dictates. |
|
|
Term
|
Definition
| Thread like structures present of some bacteria. |
|
|
Term
|
Definition
| bacterial exotoxins that can lyse erythrocytes. |
|
|
Term
|
Definition
|
|
Term
|
Definition
| An adhesion molecule on the cell wall of gram + bacteria. Thought to be a virulence factor. |
|
|
Term
| When does bacterial colonization occur |
|
Definition
- Within hours of birth
- Anaerobic bacteria can be found in an infants mouth within 48hrs
- Mature microbiota can be found within 2wks
- Completely formed microorganisms 1x1014
|
|
|
Term
| How much and how many types of bacteria can be found in most two year olds |
|
Definition
400 different types of bacteria
10 times more bacteria than human cells |
|
|
Term
| What type of relationship do most bacteria have with their host? |
|
Definition
| commensal relationship which benefical to both parties |
|
|
Term
| Clearly understand what must happen for bacterial colonization to become detrimental |
|
Definition
- Susceptibility-host response
- Specific pathogens-There must be a high proportion or number of these pathogens to initiate disease
- Beneficial- These are done in 5 ways
|
|
|
Term
| Name five ways that benefical bacterial colonization can become detrimental |
|
Definition
- Occupying a niche that maybe otherwise be colonized by pathogens
- Limiting pathogen ability to adhere to tissues
- Adversely affecting the vitality or growth of a pathogen
- By affecting the ability of a pathogen to produce virulrnce factors
- Directly degrading virulence factors produced by a pathogen
|
|
|
Term
| Understand that once a tooth erupts into the oral cavity, bacterial colonization begins. |
|
Definition
| After erpution a more complex oral flora becomes established |
|
|
Term
| Define the five major ecosystems for bacterial colonization in the oral cavity |
|
Definition
- Hard surfaces that are supragingival
- Periodontal pocket
- Buccal epithelium, palatal epithelium, floor of the mouth
- Dorsum of the tongue
- Tonsils
|
|
|
Term
| Identify the major ecosystem for periodontal pathogens. |
|
Definition
- Tooth
- Periodontal pocket
- Epithelium
|
|
|
Term
| To understand the difference between dental plaque and materia alba |
|
Definition
Dental Plaque: Composed of bacteria in a matrix of salivary glycoprotein's and extracellular polysaccarides
Materia alba: Soft accumulations of bacteria and tissue cells that lack the organized structure of dental plaque. It is easily displaced with a spray of water |
|
|
Term
| Understand the differences between supragingival and subgingival plaque. |
|
Definition
Supragingival plaque: Gram+ cocci and short rods/gram - rods and filaments on the outer surface of mature plaque. Uses circulating carbs from saliva and GCF
Subgingival plaque: Anaerobic uses tissue and cellular breakdown products and carbs from GCF and serum |
|
|
Term
| Discribe the differences between the nutritional sources for supragingival and subgingival plaque |
|
Definition
Supragingival: Circulating carbs from saliva and GCF
Subgingival: Carbs from GCF and serum |
|
|
Term
| Identify where subgingival plaque attaches |
|
Definition
| Below the gingival margin |
|
|
Term
Identify which group of subgingival bacteria are the most virulent. |
|
Definition
|
|
Term
Understand the four stages of bacterial adhesion and attachment |
|
Definition
- Transport to the surface
- Intial adhesion
- Attachment
- Colonization of the surface and biofilm formation
|
|
|
Term
| Understand how a “corn cob arrangement” is formed. |
|
Definition
| Long-standing supragingival plaque near the gingival margin demonstrates "corncob" arrangement. A central gram-neg. filamentous core supports the outer coccal cells, which are firmly attached by interbacterial adherence or coaggregation |
|
|
Term
| Name three ways that “biofilm” helps bacterial plaque? |
|
Definition
1. Adhere to the tooth
2. Embedded in an extracellular slime layer-protects the colony from antibiotics, antimicrobial, and host defense mechanisms
3. Has fluid channels-brings in nutrients |
|
|
Term
| What factors effect bacteria load? |
|
Definition
|
|
Term
| Describe the affect that variations within the detition have on bacteria load |
|
Definition
|
|
