Micro Bio Ch 24

Which of the following statements about otitis media is false?

A) It is caused by Streptococcus pyogenes.  
B) It is a complication of tonsillitis.
C)It is transmitted by swimming pool water.  
D) It is caused by rhinovirus.
E) It is caused by Staphylococcus aureus.

Which of the following does NOT confirm a diagnosis of strep throat?

A) Hemolytic reaction 
B) Bacitracin inhibition  
C) Symptoms  
D) Serological tests  
E) Gram stain

Penicillin is used to treat all of the following EXCEPT

A) Streptococcal sore throat.  
B) Diphtheria. 
C) Pneumococcal pneumonia.
D) Mycoplasmal pneumonia.
E) Scarlet fever.

Mycoplasmal pneumonia differs from viral pneumonia in that

A) Mycoplasmal pneumonia doesn't have any known etiologic agent.
B)Mycoplasmal pneumonia is treated with tetracyclines.
C) Viral pneumonia is treated with tetracyclines.
D)The symptoms are distinctly different.
E) Mycoplasma can't be cultured.

Which of the following pairs is mismatched?

A) Corynebacterium – gram-positive rod  
B) Mycobacterium – acid-fast rod
C) Mycoplasma – gram-positive pleomorphic rod  
D) Bordetella – gram-negative
pleomorphic rod
E)Haemophilus – gram-negative rod

Which of the following microorganisms causes symptoms most like tuberculosis?

A) Histoplasma 
B) Coccidioides 
C) Legionella  
D) Mycoplasma  
E) Influenzavirus

Which of the following CANNOT lead to a positive tuberculin skin test?

A) Vaccination  
B) Current tuberculosis infection  
C) Previous tuberculosis infection  
D) Immunity to tuberculosis
E) Being near someone with tuberculosis

Which of the following diseases is NOT correctly matched to its vaccine?

A) Tuberculosis – toxoid
B) Whooping cough – heat-killed bacteria  
C) Diphtheria – toxoid
D) Influenza – viruses grown in embryonated eggs  
E) Pneumococcal pneumonia – capsular polysaccharides

Which of the following diseases is NOT correctly matched to a virulence factor?

A) Diphtheria – exotoxin  
B) Scarlet fever – exotoxin 
C) Pneumococcal pneumonia – exotoxin
D) Haemophilus pneumonia –endotoxin  
E) Whooping cough – endotoxin

Which of the following diseases has a cutaneous form, especially in individuals over 30 years of age?

A) Coccidioidomycosis
B) Diphtheria  
C) Legionellosis  
D) Scarlet fever  
E) Psittacosis

Which of the following causes an infection of the respiratory system that is transmitted
by the gastrointestinal route?

A) Streptococcus pyogenes
B) Mycobacterium tuberculosis  
C) Mycoplasma pneumoniae
D) Haemophilus influenza  
E) Streptococcus pneumoniae

Which of the following does NOT cause pneumonia?

A) Legionella
B) Haemophilus
C) Mycoplasma  
D) RSV  
E) Histoplasma

Which of the following pairs is mismatched?

A) Epiglottitis – Haemophilus
B) Q fever – Rickettsia  
C) Psittacosis – Chlamydia
D) Whooping cough – Bordetella
E) Melioidosis – Burkholderia

Which of the following causes opportunistic infections in AIDS patients?

A) Pneumocystis
B) Aspergillus  
C) Rhizopus  
D) Mucor  
E) All of the above

Which of the following diseases is NOT correctly matched to its reservoir?

A) Tuberculosis – cattle  
B) Histoplasmosis – soil  
C) Psittacosis – parakeets  
D) Coccidioidomycosis – air
E) Pneumocystis – humans

Which of
the following does NOT produce an exotoxin?

A) Bordetella pertussis  
B) Corynebacterium diphtheria  
C) Mycobacterium tuberculosis
D) Streptococcus pygogenes  
E) All of the above produce an exotoxin

Which one of the following causes a disease characterized by the catarrhal, paroxysmal,
and convalescent stages?

A) Bordetella pertussis  
B) Corynebacterium diphtheria   
C) Mycobacterium tuberculosis
D) Streptococcus pyogenes  
E) Respiratory syncytial virus

Which one of the following is an irregular, gram-positive rod?

A) Bordetella pertussis  
B) Corynebacterium diphtheria  
C) Myobacterium tuberculosis
D) Streptococcus pyogenes  
E) Pneumocystis jirovecii

Infection by which of the following results in the formation of Ghon complexes?

A) Bordetella pertussis  
B) Corynebacterium diphtheria  
C) Mycobacterium tuberculosis
D) Streptococcus pyogenes  
E) Blastomyces dermatidis

Which one of the following produces the most potent exotoxin?

A) Bordetella pertussis  
B) Corynebacterium diphtheria  
C) Mycobacterium tuberculosis
D) Streptococcus pyogenes  
E) Streptococcus pneumoniae

The recurrence of influenza epidemics is due to

A) Lack of antiviral drugs.  
B) The Guillain-Barré syndrome.  
C) Antigenic shift.
D) Lack of naturally acquired active immunity.  
E) HA spikes

Which of the following is an opportunistic pathogen?

A) Pneumocystis  
B) Legionella   
C) Histoplasma  
D) Mycoplasma  
E) Rhinovirus

Which of the following etiologic agents results in the formation of abscesses?

A) Staphylococcus 
B) Mycoplasma  
C) Streptococcus  
D) Blastomyces  
E) Coccidioides

A healthy carrier state exists for

A) Corynebacterium diphtheriae.  
B) Streptococcus pneumoniae.  
C) Beta-hemolytic streptococci.
D) Haemophilus influenzae.  
E) All of the above

Which of the following is most susceptible to destruction by phagocytes?

A) Chlamydophila psittaci  
B) Streptococcus pneumonia  
C) Streptococcus pyogenes  
D) Influenza virus  
E) Histoplasma capsulatum

Infection by which of the following is often confused with viral pneumonia?

A) Blastomyces  
B) Coccidioides  
C) Mycoplasma  
D) Streptococcus  
E) None of the above

Which one of the following causes a disease characterized by a red rash?

A) Blastomyces  
B) Coccidioides  
C) Mycoplasma  
D) Streptococcus  
E) RSV

Inhalation of arthroconidia is responsible for infection by which of the following
organisms?

A) Blastomyces  
B) Coccidioides  
C) Mycoplasma  
D) Streptococcus  
E) Chlamydophila

Which of the following pairs is mismatched?

A) Q fever – fleas  
B) Psittacosis – parrots  
C) Pneumocystis – nosocomial  
D) Coccidioides – soil
E) Blastomyces – soil

A patient has pneumonia. Gram-negative rods are cultured on nutrient agar from a
sputum sample. The etiology is

A) Burkholderia pseudomallei.  
B) Chlamydophila psittaci.  
C) Haemophilus influenzae.
D) Legionella pneumophila.
E) Streptococcus pneumonia.

The patient is suffocating because of an inflamed epiglottis. What is the etiology?

A) Corynebacterium  
B) Haemophilus  
C) Bordetella  
D) Mycobacterium  
E) Can't tell

The patient has a sore throat. What is the etiology?

A) Corynebacterium  
B) Haemophilus  
C) Bordetella  
D) Mycobacterium  
E) Can't tell

The patient is suffocating because of the accumulation of dead tissue and fibrin in
her throat. What is the etiology?

A) Corynebacterium  
B) Haemophilus  
C) Bordetella  
D) Mycobacterium  
E) Can't tell

Infection by which of the following begins in lungs and spreads to skin?

A) Blastomyces  
B) Coccidioides  
C) Histoplasma  
D) Mycobacterium  
E) Pneumocystis

Which one of the following organisms does NOT belong with the others?

A) Blastomyces  
B) Coccidioides  
C) Histoplasma  
D) Mycobacterium  
E) Pneumocystis

Microscopic examination of a lung biopsy shows thick-walled cysts. What is the
etiology?

A) Blastomyces  
B) Coccidioides  
C) Histoplasma  
D) Mycobacterium  
E) Pneumocystis

Microscopic examination of a lung biopsy shows spherules. What is the etiology?

A) Blastomyces  
B) Coccidioides  
C) Histoplasma  
D) Mycobacterium  
E) Pneumocystis

You are trying to identify the cause of a patient's middle ear infection. After 24
hours, there is no growth on blood agar incubated aerobically at 37°C. Your
next step is to try again,

A) Using nutrient agar.  
B) Incubating at 25°C.  
C) Incubating anaerobically.  
D) Incubating at 45°C.
E) Then give up.

A patient who presents with red throat and tonsils can be diagnosed as having

A) Streptococcal pharyngitis.  
B) Scarlet fever.  
C) Diphtheria.  
D) Common cold.  
E) There is insufficient information.

A patient has a paroxysmal cough and mucus accumulation. What is the etiology of the
symptoms?

A) Bordetella  
B) Corynebacterium  
C) Klebsiella  
D) Mycobacterium  
E) Mycoplasma

A patient has fever, difficulty breathing, chest pains, fluid in the alveoli, and a
positive tuberculin skin test. Gram-positive cocci are isolated from the
sputum. The patient most likely has


A) Tuberculosis.  
B) Influenza.  
C) Pneumococcal pneumonia.  
D) Mycoplasmal pneumonia.  
E) Common cold.

Which of the following respiratory infections can be contracted by ingestion?

A) Streptococcal pharyngitis  
B) Diphtheria  
C) Tuberculosis  
D) Mycoplasmal pneumonia  
E) Haemophilus pneumonia

Which of the following is NOT an intracellular parasite?

A) Chlamydophila  
B) Coccidioides  
C) Coxiella  
D) Influenzavirus  
E) RSV

Which one of the following produces small "fried-egg" colonies on medium
containing horse serum and yeast extract?

A) Chlamydophila  
B) Legionella  
C) Mycobacterium  
D) Mycoplasma  
E) Streptococcus

Legionella is transmitted by

A) Airborne transmission.  
B) Foodborne transmission.  
C) Person-to-person contact.  
D) Fomites.  
E) Vectors.