19)The major advantage of antiserum is: a) It is quickly and easily produced b)I

Question

19)The major advantage of antiserum is: a) It is quickly and easily produced b)It provides circulationg antibodies immediately c) It can be administered orally d) All of the above e) none of the above

20) A viral vaccine for the common cold probably would not be beneficial because: a) A pure culture cannot be frown in tissue cultures b) A multiplicity of viral agents is responsible for the coomon cold c) Immunity is of brief duration d) All of the above e) None of the above

21)Diagnosis of infectious diseases may include the following levels: a) clinical b) Antibody response c) Isolation and identification of the causative agent d) All of the above e) None of the above

22)The lower respiratory tract is ususally kept free of microorganisms by: a) The combined action of mucus secretion and ciliary action b) Antibiotics c) Frequent use of nose drops d) All of the above e) None of the above

23)Complications following recovery from acute infections by B-streptococci may include: a)Erysipelas b) rheumatic fever c) Acute glomerulonephritis d) Only B and C above e)All of the above

24)he virulwnce of the pneumococcus appears to be solely dependent on: a) Leukocidins b) Hyaluronidase c) Capsule d) Hemolysins e) None of the above

Explanation / Answer

19- e) none of the above

20- e) None of the above

21-  d) All of the above

22-  a) The combined action of mucus secretion and ciliary action

23-d) Only B and C above

24-c) Capsule

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