More things to Consider

• Titer results will vary depending on the laboratory and testing methodology used.

• Even among the experts, there is no clear consensus on exactly what titer is considered protective for each specific disease.

• Titers measure the patient’s immune status at a single point in time and may not necessarily reflect the patient’s future immune status one month or one year later.

• A positive titer will protect against development of clinical signs of that disease in the patient, however it may not prevent the patient from becoming infected or even transmitting the agent.

• Titers only measure circulating humoral antibodies and not cell mediated immunity, local immunity, cell memory or the anamnestic response to a viral challenge. Therefore patients with low titers may in fact be protected.