571. Hemophilus meningitis is most common in the following age group:
A. 0-5 years old
B. 5-10 years old
C. 20-60 years old
D. 60+ years old
E. All of the above
572. Mycobacteria tuberculosis is NOT:
A. a non spore fonning organism
B. an aerobic organism
C. transmitted by aerosol spread
D. take 4-6 weeks to culture
E. Multiple drug resistent species are 80% fatal in AIDs patient & 50% fatal in nonnal host.
573. Which of the following statements regarding mycobacteria tuberculosis virulence factor is WRONG?
A. Cord factor on the mycobacteria cell surface induces granulomatous fonnation.
B. Exotoxin is secreted by mycobacteria to degrade surrounding tissue
C. Sulfatides on mycobacteria cell surface inhibits macrophage lysosome fusion with phagosome containing mycobacteria
D. Cell surface heteropolysaccharide LAM induces macrophage to secrete TNFa.
E. Cell surface heteropolysaccharide LAM induce 1L 10 secretion to inhibit T cell proliferation which occurs in response to mycobacterial infection.
574. Granulomatous reaction due to mycobacterial tuberculosis infection develops over:
A. 2-3 days
B. 1 week
C. 2-3 weeks
D. 1 month
E. 2-3 months
575. Which of the following statements regarding tuberculosis is TRUE?
A. Delayed hypersensitivity reaction controls 95% primary mycobacterial tuberculosis infectionin the normal host
B. Ghon complex consists of primary infection calcified scar in the subpleural lung parenchyma above or below the interlobular fissure between the upper & lower lobes & the enlarged caseous hilar lymph node.
C. Secondary tuberculous granuloma is most often found in the lung apices.
D. Pulmonary cavitation in 2° TB predisposes to miliary spread via hematogenous route as the cavities rupture into blood vessels.
E. All of the above.
576. Which of the following are uncommon sites of miliary TB spread?
A. Bone marrow, liver & spleen B. Meninges & retina
B. Kidney, adrenals, fallopian tubes & epididymus
C. Heart, thyroid & pancreas
D. Bone ( esp vertebrae)
578. Which of the following regarding bacterial enteritis is TRUE?
A. Shigella cuses dysentery only in human
B. Shigella contains shiga toxin which is associated with hemolytic uremic syndrome.
C. Campylobacter jejuni causes both watery diarrhoea & dysentery.
D. Yersinia causes distal ileal & colonic disease with ulceration
E. All of the above.
579. Staphylococci epidermidis infection is predisposed by:
A. Intravenous drug use
B. Tampon use
C. Indwelling urinary catheter
D. Prosthetic heart valves
E. All of the above
580. Which of the following staphylococci toxin is a super-antigen?
A. TSST-l
B. Exfoliative toxin
C. Enterotoxin
D. Alpha toxin
E. Beta toxin