Question 1

What organism causes melioidosis?

Accepted Answer

A)  Burkholderia mallei 
B)  B. cepacia 
C)  B. gladioli 
D)  B. pseudomallei 
A)  Burkholderia mallei 
B)  B. cepacia 
C)  B. gladioli 
D)  B. pseudomallei

Question 2

Pseudomonas aeruginosa is resistant to all the following antimicrobial agents, except

Accepted Answer

A)  Ampicillin. 
B)  Chloramphenicol. 
C)  Trimethoprim-sulfamethoxazole. 
D)  Fluoroquinolones. 
A)  Ampicillin. 
B)  Chloramphenicol. 
C)  Trimethoprim-sulfamethoxazole. 
D)  Fluoroquinolones.

Question 3

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

Accepted Answer

A)  Pseudomonas fluorescens 
B)  P. aeruginosa 
C)  P. putida 
D)  P. stutzeri 
A)  Pseudomonas fluorescens 
B)  P. aeruginosa 
C)  P. putida 
D)  P. stutzeri

Question 4

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

Accepted Answer

A)  Oxidase 
B)  Indole 
C)  Citrate 
D)  Voges-Proskauer (VP) 
A)  Oxidase 
B)  Indole 
C)  Citrate 
D)  Voges-Proskauer (VP)

Question 5

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

Accepted Answer

A)  Psychrobacter immobilis 
B)  Chromobacterium violaceum 
C)  Chryseomonas luteola 
D)  Paracoccus phenylpyruvicus 
A)  Psychrobacter immobilis 
B)  Chromobacterium violaceum 
C)  Chryseomonas luteola 
D)  Paracoccus phenylpyruvicus

Question 6

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

Accepted Answer

A)  Moraxella catarrhalis 
B)  Burkholderia mallei 
C)  Pseudomonas putida 
D)  B. gladioli 
A)  Moraxella catarrhalis 
B)  Burkholderia mallei 
C)  Pseudomonas putida 
D)  B. gladioli

Question 7

In what single setting does Stenotrophomonas maltophilia typically produce disease?

Accepted Answer

A)  Community 
B)  Military barracks 
C)  Nosocomial 
D)  College dorms 
A)  Community 
B)  Military barracks 
C)  Nosocomial 
D)  College dorms

Question 8

All of the following are characteristics of pseudomonads, except

Accepted Answer

A)  thin gram-negative bacilli or coccobacilli. 
B)  oxidase-positive. 
C)  indole-positive. 
D)  resistance to a variety of antimicrobials, such as aminoglycosides, third-generation cephalosporins, penicillins, and fluoroquinolones. 
A)  thin gram-negative bacilli or coccobacilli. 
B)  oxidase-positive. 
C)  indole-positive. 
D)  resistance to a variety of antimicrobials, such as aminoglycosides, third-generation cephalosporins, penicillins, and fluoroquinolones.

Exam 21: Nonfermenting and Miscellaneous Gram-Negative Bacilli

What organism causes melioidosis?

Pseudomonas aeruginosa is resistant to all the following antimicrobial agents, except

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

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

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

In what single setting does Stenotrophomonas maltophilia typically produce disease?

All of the following are characteristics of pseudomonads, except

Bacterial Cell Structure, Physiology, Metabolism, and Genetics

Hostparasite Interaction

The Laboratory Role in Infection Control

Control of Microorganisms

Performance Improvement in the Microbiology Laboratory

Specimen Collection and Processing

Microscopic Examination of Materials From Infected Sites

Use of Colony Morphology for the Presumptive Identification of Microorganisms

Biochemical Identification of Gram-Negative Bacteria

Immunodiagnosis of Infectious Diseases

Applications of Molecular Diagnostics

Antimicrobial Agent Mechanisms of Action and Resistance Mechanisms

Antimicrobial Susceptibility Testing

Staphylococci

Streptococcus, Enterococcus, and Other Catalase-Negative, Gram-Positive Cocci

Aerobic Gram-Positive Bacilli

Neisseria Species and Moraxella Catarrhalis

Haemophilus, Hacek, Legionella, and Other Fastidious Gram-Negative Bacilli

Enterobacteriaceae

Vibrio, Aeromonas, and Campylobacter Species

Anaerobes of Clinical Importance

The Spirochetes

Chlamydia, Rickettsia, and Similar Organisms

Mycoplasma and Ureaplasma

Mycobacterium Tuberculosis and Nontuberculous Mycobacteria

Medically Significant Fungi

Diagnostic Parasitology

Clinical Virology

Agents of Bioterror and Forensic Microbiology

Biofilms: Architects of Disease

Upper and Lower Respiratory Tract Infections

Skin and Soft Tissue Infections

Gastrointestinal Infections and Food Poisoning

Infections of the Central Nervous System

Bacteremia and Sepsis

Urinary Tract Infections

Genital Infections and Sexually Transmitted Infections

Infections in Special Populations

Zoonotic Diseases

Ocular Infections

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