Which of the following extracellular enzymes produced by Group A streptococci is called "spreading factor," an enzyme important in skin and soft tissue infection?
A. Streptokinase
B. Hyalunsonidase(ans)
(
C. M Protein
D. Deoxyribonuclease C
E. None of the above
Which of the following statements about the 23-valent pneumococcal vaccine is not correct?
A. It is a protein-conjugated, polysaccharide vaccine.
B. It is poorly immunogenic in young children and immunocompromised hosts.(ans)
C. It is routinely recommended for immune competent adults and children >2 yrs. of age at risk for serious pneumococcal disease.
D. It protects against the major serotypes of pneumococci causing infection.
E. An adult with asplenia would be a candidate for this vaccine.
A 12 year old boy presents with acute onset of sore throat, fever to 38.9 degrees C and painful anterior cervical lymphadenopathy. On exam the pharynx is red and swollen and the tonsils are covered with yellow-white exudate. The child also has halitosis. Which of the following non-suppurative complications are of concern?
A. Sinusitis
B. Acute rheumatic fever alone
C. Acute glomerulonephritis alone
D. Acute rheumatic fever and acute glomerulonephritis(ans)
E. Scarlet fever alone
A person who has a normal healthy immune system acquires a new strain of E. coli that now lives in his gastrointestinal tract. This individual is not ill. A second person with an acute leukemia and no white blood cells acquires the same organism, develops diarrhea followed by hypotension, bacteremia, sepsis, and death. This organism is:
A. Normal flora for both individuals
B. A pathogen for both individuals
C. An opportunistic pathogen for both individuals(ans)
D. One with a low degree of virulence
correct me if i'm wrong
