Exam 21: Nonfermenting and Miscellaneous Gram-Negative Bacilli

What organism is an opportunistic pathogen that strikes the immunocompromised patient with neutrophil deficits and produces a violet pigment on nonselective agar?

What is the name of the genus of organisms that colonized 45% of all tracheotomy patients?

A microbiologist is reading the plates from a sputum culture.On the sheep blood agar (SBA),she sees flat spreading colonies with a metallic sheen.On cetrimide agar,she sees a fluorescent green color in the media with clear colonies.On MacConkey,she sees medium clear colonies that have a fruity or grape-like odor.What is the most likely organism?

All of the following are characteristics of nonfermenters EXCEPT:

What organisms,which are gram-negative coccobacilli,can appear as gram-positive cocci in smears made from blood culture bottles?

What organism causes melioidosis?

Which plant pathogen may be mistaken for Burkholderia cepacia?

Which nonfermenter is considered by government agencies to be a potential bioterrorist agent?

What two species of Pseudomonas have been linked to transfusion-associated septicemia?

What is unique about the Sphingobacterium spp.?

What organism causes pulmonary disease among individuals with cystic fibrosis?

What biochemical test will differentiate nonfermenters from Enterobacteriaceae (except Plesiomonas)?

What nonfermenter may produce a weak,slow,positive oxidase reaction?

Elizabethkingae (Chryseobacterium)meningosepticum causes all the following diseases EXCEPT:

Pseudomonas aeruginosa is resistant to all the following antimicrobial agents EXCEPT:

What substances do nonfermenters fail to ferment?

What nonfermenter is the leading cause of nosocomial pneumonia and bacteremia?

What is the most common member of the genus Moraxella isolated in the clinical laboratory?

Burkholderia pseudomallei is found in all the following areas EXCEPT:

Members of the Alcaligenes are usually susceptible to all the following antibiotics EXCEPT: