Dragonfly wrote:11. E. Staph. A. is normal flora on : 1-skin 2- nasopharynx 42. i think D. polysaccharide is not recognized niether by ig-G nor by TCR only by igM (unlike proteins). therfore it only can form a non-T-dependent immunity with no memory formation !!! (so what is the point of the vaccine then  ) 17. E. this is cystosarcosis. tenia solium 24. i think D. cell wall keeps the structure. correct me if i am wrong 34.H. it is a prion. no genes. just protein thanx for ur help.. can anyone else help out with the rest?
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| giovanni83
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-After an operation on abdomen, staf and pseudomonas enter via wound, even if it's true that staf is normal resident of nose
-The most common cause of UTIs is E.Coli, a gram negative baccillus; the second most common is Staf. Saprophiticus, a gram + cocchi
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| cd
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39 D, e coli is the common organism for uti, which is gram negative bacili, this infection is usully find in a women after a marriage, hence it is called honey moon infection.
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| bactitech
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The Staph entered through a wound infection. It did not come from the nasopharynx or from normal skin flora. If that were the case, about 15% of the population would be walking around septic all the time. Post-op wounds are common sources of Staph. aureus (AND MRSA, which they usually are, unfortunately, in hospitals nowadays. Please become very familiar with MRSA, because most of the Staph. you will treat will be this one). If you have to ask what MRSA stands for, you really need to review your micro and read the daily newspaper a bit more often.
E. coli is a gram negative rod and is the most common cause of UTI's in females. Although the textbooks tout S. saprophyticus to be the next most common in females, I haven't found that to be the case in our lab, and we do LOTS of urine cultures. Go with what the texts say for your exams, though. We screen any S. sapro. with a novobiocin disc on positive cultures for women of childbearing age. If resistant to NB, we call it S. sapro. There are other ways of identifying this bug also (FX disc [can't remember what the FX stands for], Nitrofurantoin disc = either should be resistant).
Sorry I can't help you with the other questions.
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| fongch
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24 E S.pyogenes has capsule, right?
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Can you please help me out with them? I wanted to understand also why it is the correct answer and I have been having trouble finding the reasoning behind these particular questions. 
