Question 1

Campylobacter 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 selection of enteric pathogens 
D) Enrichment for Campylobacter spp. 
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 selection of enteric pathogens 
D) Enrichment for Campylobacter spp. D

Question 2

Cultures for isolation of Campylobacter jejuni and Campylobacter coli should be incubated in:

Accepted Answer

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

Question 3

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. A

Question 4

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 selection of 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 selection of enteric pathogens 
D) Enrichment for enteric pathogens such as Salmonella and others

Question 5

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

Question 6

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 selection of 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 selection of enteric pathogens 
D) Enrichment for enteric pathogens such as Salmonella and others

Question 7

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 selection of 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 selection of enteric pathogens 
D) Enrichment for enteric pathogens such as Salmonella and others

Question 8

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

Accepted Answer

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

Question 9

Gram-negative 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 selection of 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 selection of enteric pathogens 
D) Enrichment for enteric pathogens such as Salmonella and others

Question 10

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 selection of 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 selection of enteric pathogens 
D) Enrichment for enteric pathogens such as Salmonella and others

Exam 73: Gastrointestinal Tract Infections

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

Cultures for isolation of Campylobacter jejuni and Campylobacter coli should be incubated in:

The normal flora of the adult large bowel consists predominantly of:

Selenite 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:

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

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

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

Gram-negative broth serves which purpose when used in the bacterial fecal culture?

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

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

Overview of Immunochemical Methods Used for Organism Detection

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

Erysipelothrix, 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 Non-culturable Bacterial Agents

Cell Walldeficient Bacteria: Mycoplasma and Ureaplasma

The Spirochetes

Overview of the Methods and Strategies in Parasitology

Intestinal Protozoa

Blood and Tissue Protozoa

Protozoa From Other Body Sites

Intestinal Nematodes

Tissue Nematodes

Blood Nematodes

Intestinal Cestodes

Tissue Cestodes

Intestinal Trematodes

Liver and Lung Trematodes

Blood Trematodes

Overview of Fungal Identification Methods and Strategies

Hyaline Molds, Zygomycetes, Dermatophytes, and Opportunistic and Systemic Mycoses

Dematiaceious Molds

Opportunistic Atypical Fungus: Pjirovecii

The Yeasts

Anti-fungal Susceptibility Testing, therapy, and Prevention

Overview of the Methods and Strategies in Virology

Viruses in Human Disease

Antiviral Therapy Susceptibility Testing and Prevention

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