Question 1

The transport medium that best preserves the viability of most intestinal bacterial pathogens is

Accepted Answer

A) buffered glycerol. 
B) a rectal culture swab. 
C) Cary-Blair. 
D) Campy-thioglycollate broth. 
A) buffered glycerol. 
B) a rectal culture swab. 
C) Cary-Blair. 
D) Campy-thioglycollate broth. C

Question 2

Selenite broth serves which purpose when used in the bacterial fecal culture?

Accepted Answer

A) Evaluation of general flora and predominant species 
B) Selection of enteric pathogens such as Salmonella, Aeromonas, and others 
C) Inhibition of normal flora and select for enteric pathogens 
D) Enrichment for enteric pathogens such as Salmonella and others 
A) Evaluation of general flora and predominant species 
B) Selection of enteric pathogens such as Salmonella, Aeromonas, and others 
C) Inhibition of normal flora and select for enteric pathogens 
D) Enrichment for enteric pathogens such as Salmonella and others D

Question 3

MacConkey agar serves which purpose when used in the bacterial fecal culture?

Accepted Answer

A) Evaluation of general flora and predominant species 
B) Selection of enteric pathogens such as Salmonella, Aeromonas, and others 
C) Inhibition of normal flora and select for enteric pathogens 
D) Enrichment for enteric pathogens such as Salmonella and others 
A) Evaluation of general flora and predominant species 
B) Selection of enteric pathogens such as Salmonella, Aeromonas, and others 
C) Inhibition of normal flora and select for enteric pathogens 
D) Enrichment for enteric pathogens such as Salmonella and others B

Question 4

Sheep blood agar serves which purpose when used in the bacterial fecal culture?

Accepted Answer

A) Evaluation of general flora and predominant species 
B) Selection of enteric pathogens such as Salmonella, Aeromonas, and others 
C) Inhibition of normal flora and select for enteric pathogens 
D) Enrichment for enteric pathogens such as Salmonella and others 
A) Evaluation of general flora and predominant species 
B) Selection of enteric pathogens such as Salmonella, Aeromonas, and others 
C) Inhibition of normal flora and select for enteric pathogens 
D) Enrichment for enteric pathogens such as Salmonella and others

Question 5

GN Broth serves which purpose when used in the bacterial fecal culture?

Accepted Answer

A) Evaluation of general flora and predominant species 
B) Selection of enteric pathogens such as Salmonella, Aeromonas, and others 
C) Inhibition of normal flora and select for enteric pathogens 
D) Enrichment for enteric pathogens such as Salmonella and others 
A) Evaluation of general flora and predominant species 
B) Selection of enteric pathogens such as Salmonella, Aeromonas, and others 
C) Inhibition of normal flora and select for enteric pathogens 
D) Enrichment for enteric pathogens such as Salmonella and others

Question 6

Cultures for isolation of Campylobacter jejuni and Campylobacter coli should be

Accepted Answer

A) incubated in a capnophilic atmosphere at 42° C and examined at 24 and 48 hours. 
B) incubated in a microaerophilic atmosphere at 35° C and examined at 24 and 48 hours. 
C) incubated in regular room air at 35° C and examined at 48 and 72 hours. 
D) incubated in a microaerophilic atmosphere at 42° C and examined at 24 and 48 hours. 
A) incubated in a capnophilic atmosphere at 42° C and examined at 24 and 48 hours. 
B) incubated in a microaerophilic atmosphere at 35° C and examined at 24 and 48 hours. 
C) incubated in regular room air at 35° C and examined at 48 and 72 hours. 
D) incubated in a microaerophilic atmosphere at 42° C and examined at 24 and 48 hours.

Question 7

The normal flora of the adult large bowel consists predominantly of

Accepted Answer

A) anaerobic species. 
B) Staphylococcus. 
C) Enterococcus. 
D) Enterobacteriaceae. 
A) anaerobic species. 
B) Staphylococcus. 
C) Enterococcus. 
D) Enterobacteriaceae.

Question 8

XLD agar serves which purpose when used in the bacterial fecal culture?

Accepted Answer

A) Evaluation of general flora and predominant species 
B) Selection of enteric pathogens such as Salmonella, Aeromonas, and others 
C) Inhibition of normal flora and select for enteric pathogens 
D) Enrichment for enteric pathogens such as Salmonella and others 
A) Evaluation of general flora and predominant species 
B) Selection of enteric pathogens such as Salmonella, Aeromonas, and others 
C) Inhibition of normal flora and select for enteric pathogens 
D) Enrichment for enteric pathogens such as Salmonella and others

Question 9

Campy-thioglycollate broth serves which purpose when used in the bacterial fecal culture?

Accepted Answer

A) Evaluation of general flora and predominant species 
B) Selection of enteric pathogens such as Salmonella, Aeromonas, and others 
C) Inhibition of normal flora and select for enteric pathogens 
D) Enrichment for enteric pathogens such as Salmonella and others 
A) Evaluation of general flora and predominant species 
B) Selection of enteric pathogens such as Salmonella, Aeromonas, and others 
C) Inhibition of normal flora and select for enteric pathogens 
D) Enrichment for enteric pathogens such as Salmonella and others

Question 10

Stool received for routine culture in most clinical laboratories in the United States should be examined for the presence of at least

Accepted Answer

A) Campylobacter, Salmonella, and Shigella spp. 
B) Salmonella and Shigella spp. 
C) Campylobacter and Vibrio. 
D) Salmonella, Shigella, and Vibrio. 
A) Campylobacter, Salmonella, and Shigella spp. 
B) Salmonella and Shigella spp. 
C) Campylobacter and Vibrio. 
D) Salmonella, Shigella, and Vibrio.

Exam 56: Gastrointestinal Tract Infections

The transport medium that best preserves the viability of most intestinal bacterial pathogens is

Selenite broth serves which purpose when used in the bacterial fecal culture?

MacConkey agar serves which purpose when used in the bacterial fecal culture?

Sheep blood agar serves which purpose when used in the bacterial fecal culture?

GN Broth serves which purpose when used in the bacterial fecal culture?

Cultures for isolation of Campylobacter jejuni and Campylobacter coli should be

The normal flora of the adult large bowel consists predominantly of

XLD agar serves which purpose when used in the bacterial fecal culture?

Campy-thioglycollate broth serves which purpose when used in the bacterial fecal culture?

Stool received for routine culture in most clinical laboratories in the United States should be examined for the presence of at least

Microbial Taxonomy

Bacterial Genetics Metabolism and Structure

Host-Microorganism Interactions

Laboratory Safety

Specimen Management

Role of Microscopy

Traditional Cultivation and Identification

Nucleic Acid-Based Analytic Methods for Microbial Identification and Characterization

Immunochemical Methods Used for Organism Detection

Serologic Diagnosis of Infectious Diseases

Principles of Antimicrobial Action Resistance

Laboratory Methods and Strategies for Antimicrobial Susceptibility Testing

Staphylococcus, Micrococcus, and Similar Organisms

Streptococcus, Enterococcus, and Similar Organisms

Bacillus and Similar Organisms

Listeria, Corynebacterium, and Similar Organisms

Erysipelothirix, Lactobacillus, and Similar Organisms

Nocardia, Streptomyces, Rhodococcus, Oerskovia, and Similar Organisms

Enterobacteriaceae

Acinetobacter, Stenotrophomonas, and Other Organisms

Pseudomonas, Burkholderia, and Similar Organisms

Achromobacter, Rhizobium, Ochrobactrum, and Similar Organisms

Chryseobacterium, Sphingobacterium, and Similar Organisms

Alcaligenes, Bordetella Nonpertussis, Comamonas, and Similar Organisms

Vibrio, Aeromonas, Plesiomonas Shigelloides, and Chromobacterium Violaceum

Sphingomonas Paucimobilis and Similar Organisms

Moraxella

Eikenella Corrodens and Similar Organisms

Pasteurella and Similar Organisms

Actinobacillus, Kingella, Cardiobacterium, Capnocytophaga, and Similar Organisms

Haemophilus

Bartonella and Afipia

Campylobacter, Arcobacter, and Helicobacter

Legionella

Brucella

Bordetella Pertussis and Bordetella Parapertussis

Francisella

Streptobacillus Moniliformis and Spirillum Minus

Neisseria and Moraxella Catarrhalis

Overview and General Considerations

Laboratory Considerations

Mycobacteria

Obligate Intracellular and Nonculturable Bacterial Agents

Cell Wall-Deficient Bacteria: Mycoplasma and Ureaplasma

The Spirochetes

Laboratory Methods for Diagnosis of Parasitic Infections

Laboratory Methods in Basic Mycology

Laboratory Methods in Basic Virology

Bloodstream Infections

Infections of the Lower Respiratory Tract

Upper Respiratory Tract Infections and Other Infections of the Oral Cavity and Neck

Meningitis and Other Infections of the Central Nervous Systems

Infections of the Eyes, Ears, and Sinuses

Infections of the Urinary Tract

Genital Tract Infections

Skin, Soft Tissue, and Wound Infections

Normally Sterile Body Fluids, Bone and Bone Marrow, and Solid Tissues

Laboratory Physical Design, Management, and Organization

Quality in the Clinical Microbiology Laboratory

Infection Control

Sentinel Laboratory Response to Bioterrorism New

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