5956685
Descripción
Test por Marina Michail, actualizado hace más de 1 año
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Creado por Marina Michail
hace casi 8 años
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Pregunta 1
Pregunta
Which of the following correctly describes Staph epidermidis?
Respuesta
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susceptible to penicillin G
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can cause UTI in catherized patients
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likely to be in a biofilm on a central venous catheter surface
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resistant to vancomycin
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coagulase positive
Pregunta 2
Pregunta
A box of meat prepared by a person with a boil on his neck is left out of refrigerator. 3 persons became violently ill after eating the sandwiches. The most likely cause is:
Respuesta
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Clostridium perfringes type A toxin
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Coagulase from Staph aureus
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Staph aureus enterotoxin
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Penicillinase given to inactivate penicillin in the meat
Pregunta 3
Pregunta
Quellung test is used for identification of:
Respuesta
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Pneumococci
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Streptococci
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H influenza
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Klebseilla
Pregunta 4
Pregunta
A young man crashes his bicycle injuring one leg, bacteria from the wound and blood culture are isolated and identified. Osteomyelitis is diagnosed. The most common causative organism is:
Respuesta
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E coli
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Staph epidermidis
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Staph aureus
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Enterococcus fecalis
Pregunta 5
Pregunta
A 22 year old female presents with fever, right knee swelling . Her joint aspirate shows gram negative diplococci. What is the most common cause of the patient septic arthritis?
Respuesta
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Staph aureus
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Strept pyogens
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Pseudomonus
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Neisseria gonorrhea
Pregunta 6
Pregunta
Active immunization against diptherira :
Respuesta
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Subunit vaccine
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Aluminium precipitated toxoid
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Antitoxin serum
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Killed vaccine
Pregunta 7
Pregunta
Which of the following is true about Listeria monocytogens?
Respuesta
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Pathogenic to man only
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Gram positive spore forming bacilli
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Tumbling motility at 37 degree
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Has a capsule
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Transmitted by contaminated milk
Pregunta 8
Pregunta
A 53 year old farmer has a circular lesion of black eschar surrounded by edema (malignant pustule). Gram stain shows gram positive bacilli in chains. Which is false about this organism?
Respuesta
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Non hemolytic on blood
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Exotoxin producing
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Treated by penicillin
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Has polysaccharide capsule
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Spore forming
Pregunta 9
Pregunta
Pathogenicity of B.anthracis is due to:
Respuesta
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Endotoxin
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Ig A protease
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A-B exotoxin
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C5a peptidase
Pregunta 10
Pregunta
Immunity against Listeria monocytogens is mainly:
Respuesta
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Humoral
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Cell mediated
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Innate
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Ig A mediated
Pregunta 11
Pregunta
Pseudomembranous colitis is mailnly diagnosed by:
Respuesta
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Toxin in blood
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Organism from stool
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Gram stained film
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Toxin in stool by cytotoxic effect on cell culture
Pregunta 12
Pregunta
Pathogenesis of which of the following includes retrograde axonal transport?
Respuesta
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Cl.tetani
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Cl.botulinium
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C.diphtheria
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B.anthracis
Pregunta 13
Pregunta
Rapid test for diagnosis of gas gangrene:
Respuesta
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Culture on blood agar
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Nagler reaction
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Sugar fermentation
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Elek test
Pregunta 14
Pregunta
Which is not capsulated?
Respuesta
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Salmonella
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Shigella
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Klebseilla
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E.coli
Pregunta 15
Pregunta
Diagnostic titer of Enteric fever in widal test :
Respuesta
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1/80
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1/40
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1/160
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1/320
Pregunta 16
Pregunta
A gram negative, oxidase positive bacillus that can grow at 42 degree causes cough and greenish sputum on smoke inhalation produces a toxin that works by:
Respuesta
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Activating acetylcholine estrase
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Inhibiting elongation factor 2
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Producing hemolysin
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Increasing CAMP
Pregunta 17
Pregunta
Gullian Barre syndrome is a complication of:
Respuesta
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Pseudomonus
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H.pylori
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Campylobacter
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Cholera
Pregunta 18
Pregunta
A 63 year old man eats poorly cooked seafood (oysters). 24 hours later, he develops fever and bloody diarrhea. He is positive for curved rod bacteria which is:
Respuesta
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Halophilic, sucrose positive, produces heat labile cytotoxin
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Halophilic, sucrose negative, produces heat stable cytotoxin
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Optimum growth at 42
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Reservoir is cattle and birds
Pregunta 19
Pregunta
Diagnostic titer in Brucella:
Respuesta
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1/80
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1/160
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1/40
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1/320
Pregunta 20
Pregunta
The main component of H.influenza type B vaccine :
Respuesta
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Toxoid
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Mutant strain
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Whole cell killed vaccine
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Polysaccharide capsule with protein carrier
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