Questions and Answers
Which of the following statements about Legionella pneumophila is false?
it is rapid growing organism on routine laboratory media
Which of the following statements about Rocky Mountain Spotted Fever is incorrect?
the agent grows in macrophages
Which characteristic is not associated with the genus Corynebacterium?
spore forming
Which statement about mycobacterial cell-wall is incorrect?
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Which mode of transmission is associated with Legionella pneumophila?
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What is the drug of choice for treating Legionella pneumophila infection?
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Study Notes
Legionella pneumophila
- Legionella pneumophila is a water-borne organism transmitted by inhalation
- Erythromycin is the drug of choice for treatment
- Risk factors for infection include advanced age and smoking
- It is not a rapid-growing organism on routine laboratory media
Rocky Mountain Spotted Fever
- Rocky Mountain Spotted Fever is caused by Rickettsia rickettsii
- It is transmitted by hard-bodied ticks
- The agent grows in endothelial cells lining blood vessels
- It does not grow in macrophages
Genus Corynebacterium
- Genus Corynebacterium includes bacilli arranged in V, L & W forms
- They are non-motile
- They do not form spores
Mycobacterial Cell-Wall
- Trehalose 6-6' dimycolyl esters correlate with virulence
- Mycolic acid is responsible for acid-fastness
- There is no mention of necrosis or molecules as characteristics of mycobacterial cell-wall
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