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Gram Positive
(Single Best Answer) Question 1: The sputum specimen of a 70 year old male was cultured on a 5 % sheep blood agar. The culture showed the presence of alpha - haemolytic colonies next day. The further processing of this organism is most likely to yield ?
A) Gram positive cocci in short chains, catalase negative and bile resistant
B) Gram positive cocci in pairs, catalase negative and bile soluble
C) Gram positive cocci in clusters, catalase positive and coagulase positive
D) Gram negative coccobacilli, catalase positive and oxidase positive
Answer (Select an option above to get the answer):
(Single Best Answer) Question 2: All of the following statements are true about tubercle bacilli except ?
A) It grows well at 37ºC
B) It does not produce pigment
C) It was discovered by Thomas Kocher
D) It is gram positive
Answer (Select an option above to get the answer):
(Single Best Answer) Question 3: The most common pathogens responsible for nosocomial pneumonias in the ICU are ?
A) Gram positive organisms
B) Gram negative organisms
C) Mycoplasma
D) Virus infections
Answer (Select an option above to get the answer):
(Single Best Answer) Question 4: A 3 week old child presented to the pediatrician with meningitis. A presumptive diagnosis of late onset of a perinatal infection was made. The CSF culture was positive for gram positive bacilli. Which of the following characteristic of this bacteria would be helpful in differentiating it from other bacteria agents ?
A) Ability to grow on Blood agar
B) Ability to produce catalase
C) Fermentative attack on sugars
D) Molitity at 25°C
Answer (Select an option above to get the answer):
(Single Best Answer) Question 5: The most common pathogens responsible for nosocomial pneumonias in the ICU are ?
A) Gram positive organisms
B) Gram negative organisms
C) Mycoplasma
D) Virus infections
Answer (Select an option above to get the answer):
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