A 58-year old minister visited his physician because of pain in his chest and difficulty in breathing. He also complained of loss of appetite, cough, and uncharacteristic nosebleeds. Examination revealed a low-grade fever and abdominal tenderness that the minister said might be due to his current bout with constipation. Questioning revealed he had returned from a mission trip to Africa ten days prior to the onset of symptoms. He was admitted to a nearby hospital for observation. Blood, urine, sputum cultures revealed the presence of this organism.

1) Which of these elements of innate immunity (barriers, secretion, inflammatory response, phagocytosis) would be involved in fighting the infection described in this Case Study? Explain your response.