<prompt> Which is not true about legionnaire pneumonia:Seen mainly in immunocompromised personErythromycin is drug of choiceCommon in patients with hairy cell leukemiaSmoking and alcohol are risk factor.  <response>: Answer is B Erythromycin is the drug of choice: Azithromycin, Clarithromycin or a fluoroquinolone eg Levofloxacin and not erythromycin is the drug of choice for treatment legionellosis because of their excellent intracellular penetration and in vitro activity as well as desirable pharmacokinetic propeies that permit oral administration and once or twice daily dosing - Agent Disease First choice Second choice Third choice Legionella Legionnaires disease Azithromycin Erythromycin Trimethoprim penumophilia Fluoroquinolone sulfomethoxazole Doxycycline 