Review Question - QID 210538

A 32-year-old man presents to the emergency department because of fever and diarrhea. He was in his normal state of health until 2 weeks ago when he went abroad on a vacation. During his trip he went kayaking, visited spas, interacted with local animals, and ate local foods. Since returning he has had 3-day history of fever, cough, headache, and diarrhea. He drinks socially and has a 15 pack-year history of smoking. On presentation his temperature is 102.3°F (39.1°C), blood pressure is 105/62 mmHg, pulse is 91/min, respirations are 18/min, and O2 saturation is 91% on room air. Chest exam reveals fine crackles on auscultation. Chest radiograph reveals patchy infiltrates in both lungs and labs reveal mild hyponatremia and mild elevation of AST/ALT levels. The organism that is most likely responsible for this patient's symptoms is associated with which of the following characteristics?