MCB 2000 Exam 3 – Flashcards
Unlock all answers in this set
Unlock answers| What is an Arbovirus |
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| arthropod diseases |
| diseases carried by insects |
| Arboviral Encephalitis |
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| Diseases of the Nervous System (Types) |
| bacterial, viral, fungal, prion |
How does skin ward off infection? name/describe two layers of skin |
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1. Which bacteria cause folliculitis? What are different forms of the disease? |
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1. List and describe the mode of action of various virulence factors possessed by Staph |
| capsule, coagulase (clotting), exfoliation, hyaluronidase (spreading factor), leukocidin, lipase, proteases, protein A (neutalizes antibody), TSS |
1. What makes Staph resist phagocytic cells? Name other bacteria resistant to phagocytosis |
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Name several systemic infections |
| Infectious Mononucleosis, Malaria, Histoplasmosis, tertiary syphilis, leishmaniasis, |
What are the important features of plague? How one can control the disease? |
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Explain how a simple foot infection may result in developing gangrene. |
| gangrene developes when a deep wound becomed infected and cuts off oxygen to the tissue. This causes the tissue to die |
What is LPS? What are the consequences of release of LPS? |
| LPS is an endotoxin that is released when the bacteria dies. Consequences include inflammation, fever, shock, and DIC (cut off of blood flow to parts of the body) |
Name the antibiotic used to treat Staph infections. Why resistance to this drug is an issue |
| Methicillin. Resistance is an issue because people with MRSA can not be treated with normal antibiotics |
Compare and contrast impetigo and erysipelas. |
| impetigo is caused by staph and strep and usually affects children and teens. erysipelas is caused only by strep and affects older adults. Both infections of the skin, usually itchy pus-filled bumps and rashes. Also both transmitted by person to person contact. |
Which genus of organisms is the most infectious to human? |
| Streptococci |
Define and give several examples of Zoonotic diseases |
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Name diseases caused by Strep pyogenees. Name the virulence factors possessed by this organism |
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What are the characteristics of the disease called necrotizing fasciitis? |
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1. Describe how acne bacteria damages the skin |
caused by Propionibacterium acnes obligate anaerobe meaning it must penetrate deep into skin to infect. |
What is the most important characteristic of Pseudomonas aeruginosa? |
| it is the most common opportunistic infection |
Name two infections caused by anthrax bacteria |
| cutaneous and inhalation anthrax |
What is the difference between chickenpox and shingles? What is meant by recurrent infections? |
| chickenpox is the initial infection and shingles is the recurrent infection. Recurrent infection is one that comes back, sometimes worse than before, after lying dormant for years. |
What are the different type of skin infections caused by fungi? Define mycosis. |
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Name and describe two skin infections caused by parasites. |
Leishmaniasis-skin and systemic, spread by sand fly (Gulf war syndrome) affects mostly AIDS patients Scabies-itching and rash, transmitted by mites but usually caught from prolonged contact (ex. sex) treated with lotion and cleaning of infected clothing |
Define conjunctivitis, kertitis, and trachoma. |
conjunctivitis- inflammation of conjunctiva keratitis- inflammation of the cornea trachoma- caused by chlamydia, found in newborns, can lead to blindness |
What is meant by neurotropic and lymphotropic viruses? |
| neurotropic viruses are spread through the nervous system, and lymphotropic viruses are spread through the lymph system |
What is DEET? |
| insect repellent associated with lyme disease |
What are the important features of Lyme disease? |
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1. What are the components of CNS? Name the normal flora of CNS. Name two diseases associated with CNS. How active is the immune system in CNS? |
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What is blood-brain barrier? |
| filtering mechanism that blocks the passage of certain substances |
| Bacterial Meniningitis (general characterisitics) |
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| Bacterial Meningitis (caused by) |
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| what are spores |
| dormant bacteria resistant to elements |
