Question 1

Quality control should be performed on which two organisms to determine the validity of deoxyribonuclease (DNase)media?

Accepted Answer

A) M.atlantae and M.lacunata 
B) M.lacunata and M.lincolnii 
C) M.nonliquefaciens and M.canis 
D) M.osloensis and M.lacunata 
A) M.atlantae and M.lacunata 
B) M.lacunata and M.lincolnii 
C) M.nonliquefaciens and M.canis 
D) M.osloensis and M.lacunata C

Question 2

Which organism appears clear on MacConkey agar and resembles some colonies of the Enterobacteriaceae family?

Accepted Answer

A) M.lacunata 
B) M.lincolnii 
C) M.canis 
D) M.nonliquefaciens 
A) M.lacunata 
B) M.lincolnii 
C) M.canis 
D) M.nonliquefaciens C

Question 3

The species of Moraxella that is most commonly associated with human infections,primarily of the respiratory tract,is:

Accepted Answer

A) M.catarrhalis. 
B) Moraxella lacunata. 
C) Moraxella canis. 
D) Moraxella atlantae. 
A) M.catarrhalis. 
B) Moraxella lacunata. 
C) Moraxella canis. 
D) Moraxella atlantae. A

Question 4

In Gram-stained preparations,M.lacunata will appear as:

Accepted Answer

A) either gram-negative coccobacilli or short,broad rods that tend to resist decolorization and may appear gram-variable. 
B) gram-negative cocci in pairs or short chains. 
C) coccobacilli or medium-sized rods. 
D) coccobacilli that may appear in chains. 
A) either gram-negative coccobacilli or short,broad rods that tend to resist decolorization and may appear gram-variable. 
B) gram-negative cocci in pairs or short chains. 
C) coccobacilli or medium-sized rods. 
D) coccobacilli that may appear in chains.

Question 5

Testing for differentiation of M.lacunata from other Moraxella species can best be performed by:

Accepted Answer

A) the ability to utilize acetate. 
B) the ability to liquefy serum. 
C) glucose utilization tests. 
D) growth on MacConkey agar. 
A) the ability to utilize acetate. 
B) the ability to liquefy serum. 
C) glucose utilization tests. 
D) growth on MacConkey agar.

Question 6

Testing for differentiation of M.nonliquefaciens and M.osloensis can best be performed by:

Accepted Answer

A) the ability to utilize acetate. 
B) the ability to liquefy serum. 
C) glucose utilization tests. 
D) growth on MacConkey agar. 
A) the ability to utilize acetate. 
B) the ability to liquefy serum. 
C) glucose utilization tests. 
D) growth on MacConkey agar.

Question 7

In Gram-stained preparations,M.atlantae will appear as:

Accepted Answer

A) either gram-negative coccobacilli or short,broad rods that tend to resist decolorization and may appear gram-variable. 
B) gram-negative cocci in pairs or short chains. 
C) coccobacilli or medium-sized rods. 
D) coccobacilli that may appear in chains. 
A) either gram-negative coccobacilli or short,broad rods that tend to resist decolorization and may appear gram-variable. 
B) gram-negative cocci in pairs or short chains. 
C) coccobacilli or medium-sized rods. 
D) coccobacilli that may appear in chains.

Question 8

The virulence of this organism(s),which is transmitted via a dog bite,is attributed to:

Accepted Answer

A) protease production. 
B) various toxins. 
C) hemolysins. 
D) something unknown. 
A) protease production. 
B) various toxins. 
C) hemolysins. 
D) something unknown.

Question 9

True cocci,such as most Neisseria spp.and Moraxella catarrhalis,can be differentiated from morphologically similar Moraxella species by:

Accepted Answer

A) comparing the penicillin susceptibility testing results of the bacteria. 
B) subjecting the bacterium to noninhibitory concentrations of penicillin. 
C) identifying the resistance of Moraxella to many β-lactam antimicrobial agents. 
D) performing the deoxyribonucleic acid (DN
A) test. 
A) comparing the penicillin susceptibility testing results of the bacteria. 
B) subjecting the bacterium to noninhibitory concentrations of penicillin. 
C) identifying the resistance of Moraxella to many β-lactam antimicrobial agents. 
D) performing the deoxyribonucleic acid (DN
A) test.

Question 10

Which of the following tests can be performed to differentiate the two subspecies of Neisseria elongata and glycolytica?

Accepted Answer

A) Catalase 
B) Nitrate reduction 
C) DNase 
D) Growth in nutrient broth 
A) Catalase 
B) Nitrate reduction 
C) DNase 
D) Growth in nutrient broth

Question 11

The commensal Neisseria spp.are often confused with pathogenic gram-negative diplococci.A simple test utilizing a blood agar plate and an antibiotic disk resulting in elongation of the cells assists in the differentiation of these organisms.Which antibiotic disk is utilized in this application?

Accepted Answer

A) Cephalosporin 
B) Vancomycin 
C) Penicillin 
D) Metronidazole 
A) Cephalosporin 
B) Vancomycin 
C) Penicillin 
D) Metronidazole

Exam 26: Moraxella

Quality control should be performed on which two organisms to determine the validity of deoxyribonuclease (DNase)media?

Which organism appears clear on MacConkey agar and resembles some colonies of the Enterobacteriaceae family?

The species of Moraxella that is most commonly associated with human infections,primarily of the respiratory tract,is:

In Gram-stained preparations,M.lacunata will appear as:

Testing for differentiation of M.lacunata from other Moraxella species can best be performed by:

Testing for differentiation of M.nonliquefaciens and M.osloensis can best be performed by:

In Gram-stained preparations,M.atlantae will appear as:

The virulence of this organism(s),which is transmitted via a dog bite,is attributed to:

True cocci,such as most Neisseria spp.and Moraxella catarrhalis,can be differentiated from morphologically similar Moraxella species by:

Which of the following tests can be performed to differentiate the two subspecies of Neisseria elongata and glycolytica?

The commensal Neisseria spp.are often confused with pathogenic gram-negative diplococci.A simple test utilizing a blood agar plate and an antibiotic disk resulting in elongation of the cells assists in the differentiation of these organisms.Which antibiotic disk is utilized in this application?

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

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