A 67year old man entered the hospital with cough, right lower chest pain accentu
ID: 3483015 • Letter: A
Question
A 67year old man entered the hospital with cough, right lower chest pain accentuated by deep breathing, and fever. He had a history of chronic obstructive pulmonary disease secondary to a long history of smoking. The temperature on admission was 39.2C, and auscultation of the chest revealed rales in the right lower lung field. The admission white blood count was 13,500/ml with 80% segmented neutrophils and a shift to the left. A blood culture was obtained.
The colonies shown in the blood (BAP) agar (left) and MacConkey (MAC) agar (right) are a 24 hour growth from an aerobic blood culture bottle that became positive at 12 hours after inoculation.
Image result for klebsiella pneumoniae on blood agar plate Image result for klebsiella pneumoniae on blood agar plate
1. The appearance of the colonies on MAC agar rules out the following two bacterial species:
o Pseudomonas aeruginosa
o Klebsiella pneumoniae
o Streptococcus pneumoniae
o Escherichia coli
Image result for klebsiella api biochemical test results
2. Based on your organism selection in question #1, and API biochemical test results above, what is your identification?
Explanation / Answer
The bacterial strain is, Klebsiella pneumoniae
A- Pseudomonas aeruginosa - Usually found in pairs
B- Klebsiella pneumoniae - grow in chains
C- Streptococcus pneumonia - Usuallyfound in pairs
D- Escherichia coli - grow in clusters
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.