An 81-year-old man presents in September with fever, chills, rigors and myalgia for 4 days. He also complains of tremors in his hands, weakness of his lower limbs, and difficulty in walking for the same duration. His family members noted progressive changes in his behavior since a day ago. He went camping in South Dakota two weeks prior to the onset of these symptoms. His medical history is significant for diabetes, atrial flutter and sick sinus syndrome for 30 years, with pacemaker implantation. He drinks socially, is not on any recreational drugs, and is not sexually promiscuous.