Exam 20: Pseudomonas, Burkholderia, and Similar Organisms

The following species,P.aeruginosa,P.fluorescens,Pseudomonas putida,P.veronii,Pseudomonas monteilii,and Pseudomonas mosselii,all produce a water-soluble,yellow-green pigment called:

Which of the following statements is true about susceptibility testing or treatment of P.aeruginosa?

Which of the following Ralstonia spp.most often causes infections in cystic fibrosis patients?

What condition is most likely when P.fluorescens,P.putida,or P.stutzeri,Brevundimonas spp. ,and Ralstonia spp.are isolated from respiratory specimens?

Which two organisms should be used to determine the validity of urea agar for quality control purposes?

Which species of Burkholderia is the one most commonly found in clinical specimens?

Which organism exhibits bipolar staining on the Gram stain,which resembles a "safety-pin" appearance?

Preferred samples for plating onto Ashdown media include throat,rectal,or sputum samples.Disease presentation can range from subclinical to disseminated disease.This infection is endemic in Southeast Asia.Which organism is being sought?

Which best describes the source of B.cepacia infections?

Which occupation would hold highest risk of glanders?

A weakly oxidase-positive,nonfermenting gram-negative rod is isolated from respiratory sample.Traditional biochemical reactions include: arginine dihydrolase-negative;lysine decarboxylase-positive;gelatin liquefaction-positive;oxidizes lactose and glucose.

Overproduction of what substance is associated with biofilm production and mucoid phenotype of P.aeruginosa isolates found in cystic fibrosis patients?

Production of exotoxin A and several proteolytic enzymes and hemolysins are factors that contribute to the pathogenicity of which organism?

Which of the following groups of bacteria have Clinical Laboratory Standards Institute (CLSI)guidelines that describe specific testing methods and interpretative standards for susceptibility reporting?

Nonfermenting gram-negative rods isolated from respiratory samples from cystic fibrosis patients are difficult to identify using commercial systems.Thus,other testing platforms are being used to aid in accurate species identification.Which of the following systems has the advantage of a large curated database of proteomic profiles representative of many microorganisms and can give definitive organism identification within minutes?

In addition to cystic fibrosis patients,patients with which other disease are at greatest risk of death due to fulminant lung infections and/or bacteremia caused by B.cepacia?

Oxidative-fermentative base-polymyxin B-bacitracin-lactose (OFPBL)media is the best media to use to isolate which one of the following organisms from the sputa of patients with cystic fibrosis?

Not including organisms in the Enterobacteriaceae family,the most common gram-negative bacilli encountered in clinical specimens are:

A flagella stain was performed;no flagella were seen.Which of the following bacterium would be consistent with negative flagella stain result?

An organism described as oxidase-positive,(K/NC)on TSI media,growth at 42°C,and produces a bright bluish-green pigment on Mueller-Hinton agar is most likely: