Question 1

The natural habitat of the bacterium Sphingobacterium is:

Accepted Answer

A) environment. 
B) animal oral and respiratory flora. 
C) environment,cold climates. 
D) human normal flora. 
A) environment. 
B) animal oral and respiratory flora. 
C) environment,cold climates. 
D) human normal flora. A

Question 2

A patient with a bacteremia identified as E.meningoseptica infection was placed on intravenous penicillin;however,the patient did not improve after 5 days.Which one of the following statements explains these findings?

Accepted Answer

A) The dose was abbreviated and therefore did not have time to work. 
B) The patient is most likely allergic to penicillin and is not responding. 
C) Penicillin is ineffective against this organism. 
D) An aminoglycoside should be given along with the penicillin to increase its effects. 
A) The dose was abbreviated and therefore did not have time to work. 
B) The patient is most likely allergic to penicillin and is not responding. 
C) Penicillin is ineffective against this organism. 
D) An aminoglycoside should be given along with the penicillin to increase its effects. C

Question 3

Neonates and individuals who are immunocompromised are at risk for developing meningitis if they contract which organism?

Accepted Answer

A) Elizabethkingia meningoseptica 
B) Myroides odoratus 
C) Sphingobacterium spp. 
D) Centers for Disease Control and Prevention (CD
C) group EO-3 
A) Elizabethkingia meningoseptica 
B) Myroides odoratus 
C) Sphingobacterium spp. 
D) Centers for Disease Control and Prevention (CD
C) group EO-3 A

Question 4

On Gram stain,which organism appears thin in the center and thicker at the ends?

Accepted Answer

A) Agrobacterium yellow group 
B) CDC groups EO-3 and EO-4 
C) E.meningoseptica 
D) E.brevis 
A) Agrobacterium yellow group 
B) CDC groups EO-3 and EO-4 
C) E.meningoseptica 
D) E.brevis

Question 5

Decontamination strategies used for potable water and the control of E.meningoseptica are similar to those utilized for which organism?

Accepted Answer

A) Streptococcus pneumoniae 
B) Staphylococcus aureus 
C) Listeria monocytogenes 
D) Legionella spp. 
A) Streptococcus pneumoniae 
B) Staphylococcus aureus 
C) Listeria monocytogenes 
D) Legionella spp.

Question 6

A patient receiving hemodialysis began spiking a fever shortly after his treatment.Blood cultures were drawn and grew out the following gram-negative rods that were indole positive with variable results for urea,nitrate reduction,and gelatin.The organism is most likely:

Accepted Answer

A) E.meningoseptica. 
B) E.brevis. 
C) CDC group O-1. 
D) Chryseobacterium spp. 
A) E.meningoseptica. 
B) E.brevis. 
C) CDC group O-1. 
D) Chryseobacterium spp.

Question 7

Quality control was performed to determine the validity of urea agar.S.multivorum and E.meningoseptica were used,which yielded positive for S.multivorum and negative for E.meningoseptica.Which one of the following statements explains this discrepancy?

Accepted Answer

A) The urea agar is most likely expired. 
B) The pH is off on the urea agar. 
C) These two organisms are poor choices for quality control because they are both urea positive. 
D) No discrepancy is present;the results are valid. 
A) The urea agar is most likely expired. 
B) The pH is off on the urea agar. 
C) These two organisms are poor choices for quality control because they are both urea positive. 
D) No discrepancy is present;the results are valid.

Question 8

Which organism is indole and gelatin positive but does not have the ability to oxidize mannitol?

Accepted Answer

A) S.multivorum 
B) CDC group O-1 
C) E.brevis 
D) E.meningoseptica 
A) S.multivorum 
B) CDC group O-1 
C) E.brevis 
D) E.meningoseptica

Question 9

Which organism's virulence is due to protease and gelatinase production,which causes the destruction of host cells and tissues?

Accepted Answer

A) Bergeyella zoohelcum 
B) E.meningoseptica 
C) Chryseobacterium indologenes 
D) Agrobacterium spp. 
A) Bergeyella zoohelcum 
B) E.meningoseptica 
C) Chryseobacterium indologenes 
D) Agrobacterium spp.

Question 10

The natural habitat of Chryseobacterium sp.can best be described as the:

Accepted Answer

A) mucous membranes of animals. 
B) gastrointestinal tract of humans and other animals. 
C) natural environment. 
D) genitourinary tract of animals. 
A) mucous membranes of animals. 
B) gastrointestinal tract of humans and other animals. 
C) natural environment. 
D) genitourinary tract of animals.

Question 11

Which two organisms should be used for quality control purposes to determine the validity of the indole reagent?

Accepted Answer

A) E.meningoseptica and Empedobacter brevis 
B) Chryseobacterium spp.and E.meningoseptica 
C) E.meningoseptica and Sphingobacterium multivorum 
D) Agrobacterium group and Sphingobacterium spiritivorum 
A) E.meningoseptica and Empedobacter brevis 
B) Chryseobacterium spp.and E.meningoseptica 
C) E.meningoseptica and Sphingobacterium multivorum 
D) Agrobacterium group and Sphingobacterium spiritivorum

Question 12

This organism is often associated with infections in patients with leukemia or lymphoma,as well as preterm infants:

Accepted Answer

A) S.multivorum 
B) C.indologenes 
C) E.meningoseptica 
D) Bergevella zoohelicum 
A) S.multivorum 
B) C.indologenes 
C) E.meningoseptica 
D) Bergevella zoohelicum

Exam 22: Chryseobacterium, Sphingobacterium, and Similar Organisms

The natural habitat of the bacterium Sphingobacterium is:

A patient with a bacteremia identified as E.meningoseptica infection was placed on intravenous penicillin;however,the patient did not improve after 5 days.Which one of the following statements explains these findings?

Neonates and individuals who are immunocompromised are at risk for developing meningitis if they contract which organism?

On Gram stain,which organism appears thin in the center and thicker at the ends?

Decontamination strategies used for potable water and the control of E.meningoseptica are similar to those utilized for which organism?

A patient receiving hemodialysis began spiking a fever shortly after his treatment.Blood cultures were drawn and grew out the following gram-negative rods that were indole positive with variable results for urea,nitrate reduction,and gelatin.The organism is most likely:

Quality control was performed to determine the validity of urea agar.S.multivorum and E.meningoseptica were used,which yielded positive for S.multivorum and negative for E.meningoseptica.Which one of the following statements explains this discrepancy?

Which organism is indole and gelatin positive but does not have the ability to oxidize mannitol?

Which organism's virulence is due to protease and gelatinase production,which causes the destruction of host cells and tissues?

The natural habitat of Chryseobacterium sp.can best be described as the:

Which two organisms should be used for quality control purposes to determine the validity of the indole reagent?

This organism is often associated with infections in patients with leukemia or lymphoma,as well as preterm infants:

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

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