Its diagnostic performance for fibrosis is similar to that of methods based on serologic markers. The diagnosis of HHV-6 infection is performed by both serologic and direct methods. Blood typing is typically performed using serologic methods. Serologic tests are less frequently used for diagnosis. Secretor status can be determined through genotyping or through serologic methods. About 60% of "Coccidioides" infections as determined by serologic conversion are asymptomatic. In serologic testing, D positive blood is easily identified. Evidence of infection in bats has been detected through molecular and serologic means. A number of serologic tests have been employed for the diagnosis of paracoccidioidomycosis. Physicians should use serologic and histologic examination to confirm the diagnosis of ACA. Latent syphilis is defined as having serologic proof of infection without symptoms of disease. A graduated pipette commonly used in medical technology with serologic pipettes for volumetric analysis. EEG, CT or MRI, CSF examination, and measles serologic testing are done. Other assays for detection of EBV are available, including serologic markers. Serologic studies should be done if lyme disease is suspected.