Question 1

What organisms often are involved in septicemia in the granulocytopenic patient?

Accepted Answer

A) Capnocytophaga spp. 
B) Eikenella corrodens 
C) Kingella spp. 
D) Fusobacterium spp. 
A) Capnocytophaga spp. 
B) Eikenella corrodens 
C) Kingella spp. 
D) Fusobacterium spp. A

Question 2

How is Bordetella disease spread?

Accepted Answer

A) Fomites 
B) Contaminated food 
C) Respiratory droplet 
D) Airborne 
A) Fomites 
B) Contaminated food 
C) Respiratory droplet 
D) Airborne C

Question 3

A microbiologist is reading a sputum culture and notices that there is no growth on the sheep blood and MacConkey agars, but there is growth on the chocolate plate.The colonies on the plate are translucent, moist, smooth, and convex, with a mousy odor.What is the most likely identification of the organism?

Accepted Answer

A) Haemophilus parainfluenzae 
B) H.influenzae 
C) H.aegyptius 
D) H.ducreyi 
A) Haemophilus parainfluenzae 
B) H.influenzae 
C) H.aegyptius 
D) H.ducreyi B

Question 4

What organism is likely to cause an infection after a cat bite?

Accepted Answer

A) Campylobacter spp. 
B) Dysgonomonas capnocytophagoides 
C) Francisella tularensis 
D) Pasteurella spp. 
A) Campylobacter spp. 
B) Dysgonomonas capnocytophagoides 
C) Francisella tularensis 
D) Pasteurella spp.

Question 5

What is the specimen of choice for Bordetella species?

Accepted Answer

A) Throat cultures 
B) Sputum specimens 
C) Bronchial aspirations 
D) Nasopharyngeal swabs 
A) Throat cultures 
B) Sputum specimens 
C) Bronchial aspirations 
D) Nasopharyngeal swabs

Question 6

A mother brings her lethargic, feverish baby into the emergency department.The baby is diagnosed with meningitis and the doctor does a spinal tap.The cerebrospinal fluid (CSF) Gram stain shows many tiny gram-negative rods.What is the most probable identification of this organism?

Accepted Answer

A) Haemophilus influenzae serotype b 
B) H.parainfluenzae 
C) H.aegyptius 
D) H.aphrophilus 
A) Haemophilus influenzae serotype b 
B) H.parainfluenzae 
C) H.aegyptius 
D) H.aphrophilus

Question 7

What Haemophilus species is called the Koch-Weeks bacillus?

Accepted Answer

A) H.influenzae 
B) H.parainfluenzae 
C) H.aegyptius 
D) H.aphrophilus 
A) H.influenzae 
B) H.parainfluenzae 
C) H.aegyptius 
D) H.aphrophilus

Question 8

What is the most frequently isolated Pasteurella species?

Accepted Answer

A) P.multocida 
B) P.septica 
C) P.gallicida 
D) P.canis 
A) P.multocida 
B) P.septica 
C) P.gallicida 
D) P.canis

Question 9

What agar is used to isolate the Bordetella species?

Accepted Answer

A) BCYE 
B) Bordet-Gengou 
C) Chocolate 
D) Martin-Lewis 
A) BCYE 
B) Bordet-Gengou 
C) Chocolate 
D) Martin-Lewis

Question 10

What are the names of the two diseases caused by Legionella species?

Accepted Answer

A) Rabbit fever and Pontiac fever 
B) Scalded skin syndrome and Legionnaires disease 
C) Malta fever and undulating fever 
D) Legionnaires disease and Pontiac fever 
A) Rabbit fever and Pontiac fever 
B) Scalded skin syndrome and Legionnaires disease 
C) Malta fever and undulating fever 
D) Legionnaires disease and Pontiac fever

Question 11

What is the drug of choice for treating Bordetella infections?

Accepted Answer

A) Erythromycin 
B) Penicillin 
C) Aminoglycosides 
D) Quinolones 
A) Erythromycin 
B) Penicillin 
C) Aminoglycosides 
D) Quinolones

Question 12

What organism causes the disease called whooping cough?

Accepted Answer

A) Bordetella pertussis 
B) Legionella pneumoniae 
C) Mycoplasma pneumoniae 
D) Chlamydophila pneumoniae 
A) Bordetella pertussis 
B) Legionella pneumoniae 
C) Mycoplasma pneumoniae 
D) Chlamydophila pneumoniae

Question 13

All the following organisms are associated with human illness except:

Accepted Answer

A) Brucella melitensis. 
B) B.ovis. 
C) B.suis. 
D) B.canis. 
A) Brucella melitensis. 
B) B.ovis. 
C) B.suis. 
D) B.canis.

Question 14

Which one of the virulence factors associated with Haemophilus spp.plays the most significant role in the invasiveness of the organism?

Accepted Answer

A) IgA protease 
B) Pili 
C) Capsule 
D) Enterotoxin 
A) IgA protease 
B) Pili 
C) Capsule 
D) Enterotoxin

Question 15

A microbiologist is reading a sputum culture and notices tiny, translucent colonies growing closely around a b-hemolytic colony on sheep blood agar (SBA).In fact, the colonies are growing in the area where the blood has been hemolyzed.What is the probable identity of the organism that is growing closely to the b-hemolytic organism, and why are they growing in the hemolyzed area?

Accepted Answer

A) Neisseria spp., because they need the factor X in this area 
B) Haemophilus spp., because they need the factor V in this area 
C) Acinetobacter spp., because they need the factors X and V 
D) Alcaligenes spp., because they require antibiotics be added to the media 
A) Neisseria spp., because they need the factor X in this area 
B) Haemophilus spp., because they need the factor V in this area 
C) Acinetobacter spp., because they need the factors X and V 
D) Alcaligenes spp., because they require antibiotics be added to the media

Question 16

What organism causes Brazilian purpuric fever (BPF)?

Accepted Answer

A) Haemophilus parainfluenzae 
B) H.aphrophilus 
C) H.aegyptius 
D) H.influenzae biogroup aegyptius 
A) Haemophilus parainfluenzae 
B) H.aphrophilus 
C) H.aegyptius 
D) H.influenzae biogroup aegyptius

Question 17

What medium will sustain the growth of most Haemophilus spp.?

Accepted Answer

A) Chocolate agar 
B) SBA 
C) PEA 
D) Thayer-Martin 
A) Chocolate agar 
B) SBA 
C) PEA 
D) Thayer-Martin

Question 18

Which species of Haemophilus requires both X and V factors?

Accepted Answer

A) H.parainfluenzae 
B) H.aphrophilus 
C) H.influenzae 
D) H.paraphrophilus 
A) H.parainfluenzae 
B) H.aphrophilus 
C) H.influenzae 
D) H.paraphrophilus

Question 19

All of the following are rapid methods used to definitively identify Legionella species except:

Accepted Answer

A) direct fluorescent antibody (DF
A) . 
B) DNA detection. 
C) indirect immunofluorescence. 
D) urine antigen testing. 
A) direct fluorescent antibody (DF
A) . 
B) DNA detection. 
C) indirect immunofluorescence. 
D) urine antigen testing.

Question 20

Which species are associated with infections in humans?

Accepted Answer

A) Haemophilus influenzae 
B) H.aegyptius 
C) H.ducreyi 
D) All of the above 
A) Haemophilus influenzae 
B) H.aegyptius 
C) H.ducreyi 
D) All of the above

Exam 18: Haemophilus and Other Fastidious Gram-Negative Bacilli

What organisms often are involved in septicemia in the granulocytopenic patient?

How is Bordetella disease spread?

What organism is likely to cause an infection after a cat bite?

What is the specimen of choice for Bordetella species?

A mother brings her lethargic, feverish baby into the emergency department.The baby is diagnosed with meningitis and the doctor does a spinal tap.The cerebrospinal fluid (CSF) Gram stain shows many tiny gram-negative rods.What is the most probable identification of this organism?

What Haemophilus species is called the Koch-Weeks bacillus?

What is the most frequently isolated Pasteurella species?

What agar is used to isolate the Bordetella species?

What are the names of the two diseases caused by Legionella species?

What is the drug of choice for treating Bordetella infections?

What organism causes the disease called whooping cough?

All the following organisms are associated with human illness except:

Which one of the virulence factors associated with Haemophilus spp.plays the most significant role in the invasiveness of the organism?

What organism causes Brazilian purpuric fever (BPF)?

What medium will sustain the growth of most Haemophilus spp.?

Which species of Haemophilus requires both X and V factors?

All of the following are rapid methods used to definitively identify Legionella species except:

Which species are associated with infections in humans?

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

Enterobacteriaceae

Vibrio, Aeromonas, Plesiomonas, and Campylobacter Species

Nonfermenting and Miscellaneous Gram-Negative Bacilli

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

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