Legionnaires’ disease?,”Legionnaires’ disease is an atypical community-acquired pneumonia with central nervous system (confusion) and GI (abdominal pain, diarrhea, hepatitis) features. The primary environmental source is water. Hotels and cruise ships are frequently implicated in outbreaks. The most common method to confirm the diagnosis is urine antigen testing. Cultures can also be taken but it can be difficult to recover. When Legionnaires’ disease is suspected or proven
therapy should include a macrolide or fluoroquinolone.”