Question 1

How do microorganisms that live in close proximity exchange DNA?

Accepted Answer

A) Frame-shift mutations and plasmid uptake 
B) Transformation and conjugation 
C) Conjugation and frame-shift mutations 
D) All of the above 
A) Frame-shift mutations and plasmid uptake 
B) Transformation and conjugation 
C) Conjugation and frame-shift mutations 
D) All of the above

Question 2

Biofilms are a universal strategy for:

Accepted Answer

A) planktonic free-floating organisms. 
B) increasing plasmid transfer for antibiotic resistance. 
C) battle sheer forces. 
D) survival, horizontal gene transfer, and growth. 
A) planktonic free-floating organisms. 
B) increasing plasmid transfer for antibiotic resistance. 
C) battle sheer forces. 
D) survival, horizontal gene transfer, and growth.

Question 3

What is a sessile-type biofilm?

Accepted Answer

A) A biofilm made up of free-floating microorganisms 
B) A multiple-species biofilm 
C) A biofilm that is attached and made up of multiple species 
D) A biofilm that is present in an aquatic environment 
A) A biofilm made up of free-floating microorganisms 
B) A multiple-species biofilm 
C) A biofilm that is attached and made up of multiple species 
D) A biofilm that is present in an aquatic environment

Question 4

What is a biofilm?

Accepted Answer

A) Communities of organisms attached to a solid surface 
B) The resulting thick, slimy mucous produced in cystic fibrosis 
C) A slime factor that can be found in your gastrointestinal tract 
D) The resulting film that is produced by necrotic tissue, bacteria, and immune cells 
A) Communities of organisms attached to a solid surface 
B) The resulting thick, slimy mucous produced in cystic fibrosis 
C) A slime factor that can be found in your gastrointestinal tract 
D) The resulting film that is produced by necrotic tissue, bacteria, and immune cells

Question 5

Treating infectious diseases has shifted from planktonic susceptibility profiles to:

Accepted Answer

A) therapeutic modalities. 
B) creative treatments. 
C) multiple interventions. 
D) degrading enzymes. 
A) therapeutic modalities. 
B) creative treatments. 
C) multiple interventions. 
D) degrading enzymes.

Question 6

All of the following organisms are very efficient at converting from planktonic to biofilm biotypes when environmental stresses hit except:

Accepted Answer

A) Coagulase-negative staphylococci. 
B) Pseudomonas aeruginosa. 
C) Micrococcus luteus. 
D) Candida albicans. 
A) Coagulase-negative staphylococci. 
B) Pseudomonas aeruginosa. 
C) Micrococcus luteus. 
D) Candida albicans.

Question 7

What is stage II of biofilm development?

Accepted Answer

A) Irreversible binding phase 
B) Multiplication phase 
C) Attachment phase 
D) Layering phase 
A) Irreversible binding phase 
B) Multiplication phase 
C) Attachment phase 
D) Layering phase

Exam 31: Biofilms: Architects of Disease

How do microorganisms that live in close proximity exchange DNA?

Biofilms are a universal strategy for:

What is a sessile-type biofilm?

What is a biofilm?

Treating infectious diseases has shifted from planktonic susceptibility profiles to:

All of the following organisms are very efficient at converting from planktonic to biofilm biotypes when environmental stresses hit except:

What is stage II of biofilm development?

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

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

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

Filters