Question 1

Incorporation of urea into media is used to enhance the detection of which organism?

Accepted Answer

A) U.urealyticum 
B) M.pneumoniae 
C) M.hominis 
D) M.genitalium 
A) U.urealyticum 
B) M.pneumoniae 
C) M.hominis 
D) M.genitalium A

Question 2

Quality control is set up to test urea agar.M.genitalium and M.hominis are used;however,both organisms are negative for urease activity.Which one of the following statements explains these findings?

Accepted Answer

A) The urea agar is most likely expired. 
B) The incubation time is most likely abbreviated. 
C) A technical error has occurred. 
D) These two organisms are poor choices for quality control of urea agar. 
A) The urea agar is most likely expired. 
B) The incubation time is most likely abbreviated. 
C) A technical error has occurred. 
D) These two organisms are poor choices for quality control of urea agar. D

Question 3

The definitive identification of which of the following organisms is accomplished by hemadsorption techniques?

Accepted Answer

A) Chlamydia trachomatis 
B) Mycoplasma hominis 
C) Mycoplasma pneumoniae 
D) Mycoplasma genitalium 
A) Chlamydia trachomatis 
B) Mycoplasma hominis 
C) Mycoplasma pneumoniae 
D) Mycoplasma genitalium C

Question 4

The natural habitat of Mycoplasma spp. ,which causes infectious disease in humans,can best be described as the:

Accepted Answer

A) mucous membranes of humans. 
B) aquatic environment. 
C) natural environment. 
D) genitourinary tract of animals. 
A) mucous membranes of humans. 
B) aquatic environment. 
C) natural environment. 
D) genitourinary tract of animals.

Question 5

Caution should be taken when culturing blood in suspected cases of Mycoplasma infections since the organism is inhibited by which anticoagulant commonly found in commercial blood culture media?

Accepted Answer

A) Ethylenediaminetetraacetic acid (EDT
A)  
B) Sodium polyanethol sulfonate (SPS) 
C) Heparin 
D) Sodium citrate 
A) Ethylenediaminetetraacetic acid (EDT
A)  
B) Sodium polyanethol sulfonate (SPS) 
C) Heparin 
D) Sodium citrate

Question 6

Which of the following Mycoplasma species is associated with individuals who are positive for human immunodeficiency virus (HIV),is capable of invading human cells,and can modulate the immune system?

Accepted Answer

A) M.pneumoniae 
B) M.genitalium 
C) M.hominis 
D) Mycoplasma fermentans 
A) M.pneumoniae 
B) M.genitalium 
C) M.hominis 
D) Mycoplasma fermentans

Question 7

The laboratory method of choice to identify Mycoplasma and Ureaplasma infections is:

Accepted Answer

A) enzyme-linked immunosorbent assay (ELIS
A) . 
B) direct fluorescent antibody (DF
A) . 
C) latex agglutination. 
D) real-time polymerase chain reaction (PCR). 
A) enzyme-linked immunosorbent assay (ELIS
A) . 
B) direct fluorescent antibody (DF
A) . 
C) latex agglutination. 
D) real-time polymerase chain reaction (PCR).

Question 8

Which of the following agents lacks a cell wall and is the smallest known free-living form?

Accepted Answer

A) Chlamydia 
B) Mycoplasma 
C) Rickettsia 
D) Coxiella 
A) Chlamydia 
B) Mycoplasma 
C) Rickettsia 
D) Coxiella

Question 9

Media that can be used for the isolation of Mycoplasma include:

Accepted Answer

A) Thayer-Martin agar with vitamin K. 
B) 5% sheep blood and IsoVitaleX. 
C) beef or soybean protein with serum and fresh yeast extract. 
D) hemin and nicotinamide-adenine-dinucleotide (NA
D) supplements. 
A) Thayer-Martin agar with vitamin K. 
B) 5% sheep blood and IsoVitaleX. 
C) beef or soybean protein with serum and fresh yeast extract. 
D) hemin and nicotinamide-adenine-dinucleotide (NA
D) supplements.

Question 10

Which group of drugs is effective against M.pneumoniae infections?

Accepted Answer

A) β-Lactams 
B) Sulfonamides 
C) Cephalosporins 
D) Fluoroquinolones 
A) β-Lactams 
B) Sulfonamides 
C) Cephalosporins 
D) Fluoroquinolones

Exam 43: Cell Walldeficient Bacteria: Mycoplasma and Ureaplasma

Incorporation of urea into media is used to enhance the detection of which organism?

Quality control is set up to test urea agar.M.genitalium and M.hominis are used;however,both organisms are negative for urease activity.Which one of the following statements explains these findings?

The definitive identification of which of the following organisms is accomplished by hemadsorption techniques?

The natural habitat of Mycoplasma spp. ,which causes infectious disease in humans,can best be described as the:

Caution should be taken when culturing blood in suspected cases of Mycoplasma infections since the organism is inhibited by which anticoagulant commonly found in commercial blood culture media?

Which of the following Mycoplasma species is associated with individuals who are positive for human immunodeficiency virus (HIV),is capable of invading human cells,and can modulate the immune system?

The laboratory method of choice to identify Mycoplasma and Ureaplasma infections is:

Which of the following agents lacks a cell wall and is the smallest known free-living form?

Media that can be used for the isolation of Mycoplasma include:

Which group of drugs is effective against M.pneumoniae infections?

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

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Nocardia, Streptomyces, Rhodococcus, Oerskovia, and Similar Organisms

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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

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Mycobacteria

Obligate Intracellular and Non-culturable Bacterial Agents

The Spirochetes

Overview of the Methods and Strategies in Parasitology

Intestinal Protozoa

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Intestinal Nematodes

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

Dematiaceious Molds

Opportunistic Atypical Fungus: Pjirovecii

The Yeasts

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Overview of the Methods and Strategies in Virology

Viruses in Human Disease

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

Meningitis and Other Infections of the Central Nervous Systems

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