This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
Diagnostic criterion for infective endocarditis include all except 
Select and explain. 
A. Positive echocardiogram, B. Positive blood culture, C. Raised ESR, D. Positive Rheumatoid factor
C: Raised ESR
Answer: C: Raised ESR 
Explanation: Ref Harrison 19 th ed pg 820 Many studies that are not diagnostic--i.e., complete blood count, creatinine determination, liver function tests, chest radi- ography, and electrocardiography--are impoant in the management of patients with endocarditis. The erythrocyte sedimentation rate, C-reactive protein level, and circulating immune complex titer are commonly increased in endocarditis