Question 1

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

Accepted Answer

A) M.nonliquefaciens 
B) M.osloensis 
C) M.lacunata 
D) M.catarrhalis 
A) M.nonliquefaciens 
B) M.osloensis 
C) M.lacunata 
D) M.catarrhalis D

Question 2

What substances do nonfermenters fail to ferment in traditional media?

Accepted Answer

A) Lipids 
B) Carbohydrates 
C) Proteins 
D) Alkaloids 
A) Lipids 
B) Carbohydrates 
C) Proteins 
D) Alkaloids B

Question 3

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 B

Question 4

What is unique about the Sphingobacterium spp.?

Accepted Answer

A) Sphingomyelin in the cell wall 
B) Cholesterol in the cell wall 
C) Sphingophospholipids in the cell wall 
D) Collagen in the cell wall 
A) Sphingomyelin in the cell wall 
B) Cholesterol in the cell wall 
C) Sphingophospholipids in the cell wall 
D) Collagen in the cell wall

Question 5

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

Accepted Answer

A) Burkholderia cepacia 
B) Pseudomonas putida 
C) Stenotrophomonas maltophilia 
D) P.stutzeri 
A) Burkholderia cepacia 
B) Pseudomonas putida 
C) Stenotrophomonas maltophilia 
D) P.stutzeri

Question 6

In what single setting does Stenotrophomonas maltophilia produce all its disease?

Accepted Answer

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

Question 7

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 8

Despite all its virulence factors, what type of pathogen is Pseudomonas aeruginosa?

Accepted Answer

A) Opportunistic 
B) Primary 
C) Secondary 
D) Commensal 
A) Opportunistic 
B) Primary 
C) Secondary 
D) Commensal

Question 9

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 10

Burkholderia pseudomallei is found in all the following areas except:

Accepted Answer

A) New Zealand. 
B) Northern Australia. 
C) Mexico. 
D) Southeast Asia. 
A) New Zealand. 
B) Northern Australia. 
C) Mexico. 
D) Southeast Asia.

Question 11

Characteristics of Moraxella include:

Accepted Answer

A) oxidase positive and nonmotile. 
B) biochemically inert and aerobic. 
C) susceptible to penicillin and opportunistic pathogens. 
D) all of the above. 
A) oxidase positive and nonmotile. 
B) biochemically inert and aerobic. 
C) susceptible to penicillin and opportunistic pathogens. 
D) all of the above.

Question 12

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 media 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 13

Which of the following is a virulence factor of Pseudomonas aeruginosa?

Accepted Answer

A) Endotoxin 
B) Exotoxins 
C) Capsule 
D) All of the above 
A) Endotoxin 
B) Exotoxins 
C) Capsule 
D) All of the above

Question 14

What is the causative agent of glanders?

Accepted Answer

A) Burkholderia cepacia 
B) B.gladioli 
C) B.mallei 
D) Stenotrophomonas maltophilia 
A) Burkholderia cepacia 
B) B.gladioli 
C) B.mallei 
D) Stenotrophomonas maltophilia

Question 15

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 16

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

Accepted Answer

A) Pseudomonas putida 
B) Acinetobacter spp. 
C) Haemophilus 
D) Alcaligenes spp. 
A) Pseudomonas putida 
B) Acinetobacter spp. 
C) Haemophilus 
D) Alcaligenes spp.

Question 17

All of the following are characteristics of nonfermenters 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.

Question 18

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

Accepted Answer

A) aminoglycosides. 
B) ceftazidime. 
C) sulfamethoxazole-trimethoprim (SXT). 
D) piperacillin. 
A) aminoglycosides. 
B) ceftazidime. 
C) sulfamethoxazole-trimethoprim (SXT). 
D) piperacillin.

Question 19

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

Accepted Answer

A) Acinetobacter spp. 
B) Pseudomonas aeruginosa 
C) P.mendocina 
D) P.fluorescens 
A) Acinetobacter spp. 
B) Pseudomonas aeruginosa 
C) P.mendocina 
D) P.fluorescens

Question 20

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

Accepted Answer

A) pneumonia. 
B) gastroenteritis. 
C) endocarditis. 
D) meningitis. 
A) pneumonia. 
B) gastroenteritis. 
C) endocarditis. 
D) meningitis.

Exam 21: Nonfermenting and Miscellaneous Gram-Negative Bacilli

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

What substances do nonfermenters fail to ferment in traditional media?

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

What is unique about the Sphingobacterium spp.?

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

In what single setting does Stenotrophomonas maltophilia produce all its disease?

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

Despite all its virulence factors, what type of pathogen is Pseudomonas aeruginosa?

What organism causes melioidosis?

Burkholderia pseudomallei is found in all the following areas except:

Characteristics of Moraxella include:

Which of the following is a virulence factor of Pseudomonas aeruginosa?

What is the causative agent of glanders?

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

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

All of the following are characteristics of nonfermenters except:

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

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

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

Bacterial Cell Structure, Physiology, Metabolism, and Genetics

Host-Parasite 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

Antimicrobial Susceptibility Testing

Staphylococci

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

Aerobic Gram-Positive Bacilli

Neisseria Species and Moraxella Catarrhalis

Haemophilus and Other Fastidious Gram-Negative Bacilli

Enterobacteriaceae

Vibrio, Aeromonas, Plesiomonas, 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 Diseases

Infections in Special Populations

Zoonotic Diseases

Ocular Infections

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