Question 1

An elderly man with chronic heart and lung disease develops Legionella pneumonia.By what route was the infection most likely to have been acquired?

Accepted Answer

A) Respiratory route,from an infected person 
B) Inhalation of aerosolized water from a source containing protozoa 
C) Inhalation of spores from moldy hay 
D) Exposure to livestock or animal products 
A) Respiratory route,from an infected person 
B) Inhalation of aerosolized water from a source containing protozoa 
C) Inhalation of spores from moldy hay 
D) Exposure to livestock or animal products B

Question 2

A direct immunofluorescent antibody (DFA)test was performed on a sputum sample that yielded a positive test.The organism grew on BCYE medium and was a thin gram-negative,faintly staining bacillus.What is the drug of choice for this organism?

Accepted Answer

A) Fluoroquinolones 
B) Erythromycin 
C) Penicillin 
D) Aminoglycosides 
A) Fluoroquinolones 
B) Erythromycin 
C) Penicillin 
D) Aminoglycosides A

Question 3

The medium or media of choice used to recover Legionella is:

Accepted Answer

A) buffered charcoal yeast extract (BCY
E) . 
B) Regan-Lowe agar. 
C) Löwenstein-Jensen medium. 
D) blood and chocolate agars. 
A) buffered charcoal yeast extract (BCY
E) . 
B) Regan-Lowe agar. 
C) Löwenstein-Jensen medium. 
D) blood and chocolate agars. A

Question 4

The natural habitat of L.pneumophila is:

Accepted Answer

A) freshwater streams. 
B) the upper respiratory tract of humans and animals. 
C) the large intestine of humans and animals. 
D) foods contaminated by soil. 
A) freshwater streams. 
B) the upper respiratory tract of humans and animals. 
C) the large intestine of humans and animals. 
D) foods contaminated by soil.

Question 5

A febrile and pneumonic illness first named in 1976 by scientists at the Centers for Disease Control and Prevention (CDC)who were investigating an epidemic of pneumonia among Pennsylvania State American Legion members attending a convention in Philadelphia is known as:

Accepted Answer

A) Philadelphia pneumonia. 
B) legionnaires' disease. 
C) tuberculosis. 
D) rheumatic fever. 
A) Philadelphia pneumonia. 
B) legionnaires' disease. 
C) tuberculosis. 
D) rheumatic fever.

Question 6

Who is at most risk to develop legionnaires' disease?

Accepted Answer

A) 65-year-old transplant recipient 
B) 14 year old swimming in a lake 
C) 90 year old living in an apartment complex 
D) Newborn baby to a mother infected with hepatitis 
A) 65-year-old transplant recipient 
B) 14 year old swimming in a lake 
C) 90 year old living in an apartment complex 
D) Newborn baby to a mother infected with hepatitis

Question 7

Organisms belonging to the genus Legionella are:

Accepted Answer

A) gram-positive diplococci. 
B) gram-positive diphtheroid bacilli. 
C) gram-negative coccobacilli. 
D) faintly staining,thin gram-negative bacilli. 
A) gram-positive diplococci. 
B) gram-positive diphtheroid bacilli. 
C) gram-negative coccobacilli. 
D) faintly staining,thin gram-negative bacilli.

Question 8

To cultivate Legionella in the laboratory,a medium supplemented with what ingredient(s)is necessary?

Accepted Answer

A) L-cysteine and iron 
B) Blood and cysteine 
C) Dopa-cysteine 
D) Nicotinic adenine 
A) L-cysteine and iron 
B) Blood and cysteine 
C) Dopa-cysteine 
D) Nicotinic adenine

Exam 33: Legionella

An elderly man with chronic heart and lung disease develops Legionella pneumonia.By what route was the infection most likely to have been acquired?

A direct immunofluorescent antibody (DFA)test was performed on a sputum sample that yielded a positive test.The organism grew on BCYE medium and was a thin gram-negative,faintly staining bacillus.What is the drug of choice for this organism?

The medium or media of choice used to recover Legionella is:

The natural habitat of L.pneumophila is:

A febrile and pneumonic illness first named in 1976 by scientists at the Centers for Disease Control and Prevention (CDC)who were investigating an epidemic of pneumonia among Pennsylvania State American Legion members attending a convention in Philadelphia is known as:

Who is at most risk to develop legionnaires' disease?

Organisms belonging to the genus Legionella are:

To cultivate Legionella in the laboratory,a medium supplemented with what ingredient(s)is necessary?

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