ME/CFS in the Department of Medicine

Tick-Borne Diseases


Lab Tests

Serologies for tick-borne diseases may be important in deciding anti-microbial specific regimens. We believe that quantitating the IgG anti-body titer against tick-borne diseases may influence the choice of anti-microbials for ME/CFS patients. Thus, we recommend that an attempt be made to obtain a numeric value of the level for the specific Tick-Borne Diseases IgG titer.

Interpreting your lab results

It is important to keep in mind a few factors when interpreting your lab results.

A high percent of the adult population may test positive for many of the pathogens mentioned on this website, so finding out if you are simply "positive" or "negative" for a pathogen may not always be useful. At Stanford we have postulated that an elevated viral antibody titer may be an indirect clue to the possibility that a virus is related to a patient’s CFS. However, the actual threshold at which this should raise such suspicion is unknown at this time.  The tests recommended on this website are those that physicians have found to be useful in identifying infection-associated CFS, and usually measure antibody levels.

Antibody tests vary from laboratory to laboratory. The laboratory director of the lab that does your test should be able to tell you how your values compare to the median of a normal population. The laboratory director should have these statistics from studies done to license the test.


The information and opinions contained in this portion of the website are intended for educational and research purposes only. It is not intended for the medical management of patients and does not necessarily reflect the views of Stanford University or Stanford Hospital and Clinics.

Only a physician familiar with a patient's individual medical history can make medical judgments and give that patient specific medical advice.

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