lecture 10 Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q
  1. Your patient is a 75-year-old man who has smoked cigarettes
    (two packs a day for more than 50 years) and consumed alcoholic
    drinks (a six pack of beer each day) for most of his adult life. He
    now has the signs and symptoms of pneumonia. Gram stain of
    the sputum reveals neutrophils but no bacteria. Colonies appear
    on buffered charcoal yeast (BYCE) agar but not on blood agar.
    Which one of the following bacteria is most likely to be the cause
    of his pneumonia?
    (A) Bordetella pertussis
    (B) Haemophilus influenzae
    (C) Klebsiella pneumoniae
    (D) Legionella pneumophila
    (E) Pseudomonas aeruginosa
  2. Regarding the patient in Question 1, which one of the following is
    the best antibiotic to treat the infection?
    (A) Azithromycin
    (B) Ceftriaxone
    (C) Gentamicin
    (D) Metronidazole
    (E) Piperacillin/tazobactam
A

(D) Legionella pneumophila

(A) Azithromycin

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q
  1. Your patient is a 6-year-old boy who is complaining that his ear
    hurts. His mother says this began yesterday and that he has a fever
    of 103°F. On physical exam, you see a perforated eardrum that is
    exuding a small amount of pus. Using a swab, you obtain a sample of the pus and do a Gram stain and culture. The Gram stain
    reveals small coccobacillary rods. There is no growth on a blood
    agar plate, but a chocolate agar plate supplemented with X and
    V factors grows small gray colonies. Which one of the following
    bacteria is the most likely cause of his otitis media?
    (A) Bordetella pertussis
    (B) Haemophilus influenzae
    (C) Klebsiella pneumoniae
    (D) Legionella pneumophila
    (E) Pseudomonas aeruginosa
A

(B) Haemophilus influenzae

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q
  1. It’s time to play “What’s my name?” I am a small gram-negative
    rod that causes an important respiratory tract disease. I produce
    an exotoxin that ADP-ribosylates a G protein. One remarkable
    feature of my disease is a great increase in lymphocytes. I don’t
    cause disease commonly in the United States now because of the
    widespread use of the vaccine that induces antibodies against five
    of my proteins, one of which is the exotoxin. The identity of the
    mystery organism is mostly likely which one of the following?
    (A) Bordetella pertussis
    (B) Haemophilus influenzae
    (C) Klebsiella pneumoniae
    (D) Legionella pneumophila
    (E) Pseudomonas aeruginosa
A

(A) Bordetella pertussis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q
  1. Your patient is a 75-year-old woman with a 110-pack-year history
    of cigarette smoking who now has a fever of 39°C and a cough
    productive of yellowish sputum. Gram stain of the sputum shows
    small gram-negative rods. There is no growth on blood agar, but
    colonies do grow on chocolate agar supplemented with hemin
    and NAD. Which one of the following bacteria is the most likely
    cause of her pneumonia?
    (A) Bordetella pertussis
    (B) Haemophilus influenzae
    (C) Klebsiella pneumoniae
    (D) Legionella pneumophila
    (E) Pseudomonas aeruginosa
A

(B) Haemophilus influenzae

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q
  1. Your patient is a 5-year-old boy with a high fever and signs of
    respiratory tract obstruction. Visualization of the epiglottis shows
    inflammation characterized by marked swelling and “cherry-red”
    appearance. Which one of the following is the best antibiotic to
    treat the infection?
    (A) Ampicillin
    (B) Ceftriaxone
    (C) Doxycycline
    (D) Gentamicin
    (E) Metronidazole
A

(B) Ceftriaxone

How well did you know this?
1
Not at all
2
3
4
5
Perfectly