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Worksheetsmcq exam_BMLT 3rd Year_11/10/2022
Total questions: 10
Worksheet time: 5mins
Staphylococcus aureus differs from Staphylococcus epidermidis by
Forming white colonies
Being common cause of UTI
Being coagulase positive
Causing prosthetic valve endocarditis
A patient in ICU is on a central venous pressure line. His blood culture shows growth of Gram-positive cocci, which are catalase positive and coagulase negative. The most likely etiological agent is
Staphylococcus aureus
Staphylococcus epidermidis
Streptococcus pyogenes
Enterococcus faecalis
An infant had high-grade fever and respiratory distress at the time of presentation to the emergency room. The sample collected for blood culture was subsequently positive showing growth of alpha-hemolytic colonies on blood agar. On Gram staining, these were Gram-positive cocci. In the screening test for identification, the suspected pathogen is likely to be susceptible to which of the following agent
Bacitracin
Novobiocin
Oxacillin
Optochin
Which of the following Streptococcal components cross-reacts with synovial fluids in joints
Carbohydrate C antigen
Polysaccharide capsule
Hyaluronic acid
Diphtheria toxin act by
Inhibiting acetylcholine release
Inhibiting glucose transport
Increasing levels of cAMP
Inhibiting protein synthesis
Which of the following is a true statement about Enterobacteriaceae
Motility is by polar flagellum
Glucose is fermented by all members of the family
All members are oxidase positive
Nitrate reduction negative
A 40-year-old female has lower abdominal pain, mild fever, and burning pain in micturition. Which of the would not favor a diagnosis of uncomplicated UTI?
Positive nitrate test of urine sample
Urine culture for E. coli revealing less than 103 bacteria per milliliter
One pus cell per 7 fields in wet film of patients urine
One bacterium per oil immersion field in Gram-stained urine sample
Which of the following is true about Streptococcus pneumoniae
Vaccine is made from capsular polysaccharide
Vaccine is routinely given to Indian children
Catalase and oxidase positive
Bile insoluble and optochin sensitive
Which of the following is true about diphtheria
Loeffler's serum is highly selective medium for C. diphtheriae
Elek's gel is a precipitation test
Metachromatic granules are produced on stain only by one strain of C. diphtheriae
Gram-negative bacilli, nonmotile, noncapsulated
A child presents with a white patch over the tonsils; rapid diagnosis is best made by culture in
Loeffler's serum slope
Lowenstein-Jensen medium
Blood agar
Tellurite medium
