TB screening for health care personnel includes a risk assessment, symptom evaluation, and TB test., Healthcare providers consider multiple factors when evaluating a patient for Lyme disease. Laboratory diagnosis of Lyme disease relies on a blood test that detects antibodies to the Lyme bacteria. It can take several weeks after infection for the immune system to make enough antibodies to be detected by the test. CDC recommends using antibody tests that have been cleared by the U.S. Food and , Waived test results, such as prothrombin time and glucose levels, adjust medication dosages for anticoagulant therapy and diabetes. In addition, erroneous results from diagnostic tests, such as those for human immunodeficiency virus (HIV) antibody, can have unintended consequences., Laboratory testing can help distinguish whether someone is susceptible to EBV infection or has a recent or past infection. Healthcare providers can test for antibodies to specific EBV-associated antigens. Monospot test is not recommended for general use., Instructions for blood collection Blood for serologic testing of measles at CDC is collected as described in the Infectious Disease Laboratories Test Directory entry for each test, listed below: Measles serology instrucitons (Test CDC-10244) Measles avidity instructions (Test CDC-10248) Testing infants or small children Blood for serologic testing of infants or small children can be collected , This varicella-zoster virus (VZV) laboratory testing information applies to testing and diagnosis of primary VZV infection (varicella) and reactivation (herpes zoster). Polymerase chain reaction (PCR) is the most helpful laboratory test for confirming cases of varicella and herpes zoster. The CDC Herpesvirus Laboratory can provide several types of VZV-specific testing..