A cystic fibrosis patient develops a severe respiratory infection that resists treatment with standard antibiotics. A specimen from the lungs is greenish in color and contains aerobic motile Gram- negative bacilli. The patient is probably infected with
A) Pseudomonas aeruginosa.
B) Bordetella pertussis.
C) Serratia marcescens.
D) Burkholderia cepacia.
E) Klebsiella pneumoniae.

Question

Quizplus · Accepted Answer

Pseudomonas aeruginosa is a common pathogen in cystic fibrosis patients, known for its green pigment (pyocyanin) and resistance to many antibiotics. It is an aerobic, motile, Gram-negative bacillus.

A Cystic Fibrosis Patient Develops a Severe Respiratory Infection That