Term
| What do you call the complex aggregation of a group of organisms marked by a protective and adhesive coat? It is a big problem with contact lenses or any prosthetic device. |
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Definition
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Term
| What type of pathogen can take down a cornea in 24 hours? |
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Definition
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Term
| How does HIV avoid immune system detection? |
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Definition
| It actively suppresses the immune system. |
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Term
| How does the herpes virus avoid immune system detection? |
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Definition
| It hides inside a cell in the nervous system where there is no circulation to trigger a response. |
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Term
| What are the only two bacteria that can penetrate the cornea? |
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Definition
1. Corynebacterium Diptheriae
2. Neisseria Gonnorhea |
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Term
| What do staph aureus, staph epidermidis, pseudomonas aueriginosa, staph pneumoniae, moraxella, and diptheroids have in common? |
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Definition
| They are all common players in bacterial keratitis |
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Term
| What is the most common cause of bacterial keratitis? |
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Definition
1. Staph aureus
2. Staph epidermidis
3. Pseudomonas aueriginosa
4. Staph pneumoniae
5. moraxella
6. Diptheroids |
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Term
| What are glycocalyx, fibronectins, and lecithins used for? |
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Definition
| They're glue like secretions that aid in bacterial adherence. |
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Term
| What is the first host reaction to an infected area? |
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Definition
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Term
| What is the most common risk factor of bacterial keratitis? |
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Definition
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Term
| Is the eye hotter in a bacterial conjunctivitis or a viral conjunctivitis? |
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Definition
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Term
| What are the steps of corneal ulceration? |
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Definition
1. Adhesion
2. Stromal invasion and release of collagenolytic exotoxins.
3. Release of PMNs
4. PMNs phagocytose pathogens
5. LPS endotoxin is released
6. LPS endotoxin stimulates the host inflammatory response and corneal damage and the ulceration occurs. |
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Term
| Where do DNA viruses usually replicate?` |
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Definition
| the nucleus, RNA viruses usually replicate in the cytoplasm. |
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Term
| What determines the tropism of a virus? (the type of cell in which the virus can replicate) |
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Definition
| the presence or absence of the appropriate viral receptor site on the cell |
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Term
| What are the two factors that determine the persistence of a virus? |
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Definition
1. Regulation of lytic potential
2. Evasion of immune surveillance |
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Term
| What two drugs are used to fight the AIDS virus? |
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Definition
| Azidothymidine/dideoxyinosine |
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