Therefore, all mothers who have Rh-negative blood and no apparent sensitization (as indicated by antibody titer) should be treated with a standard 300g dose of Rh(D) immune globulin (Rhogam) at about 28 weeks of gestation.
A titer is the serial dilution of antibodies (protein molecules or immunoglobulins produced by the immune system in response to specific disease agents) found in blood serum that determines their level of concentration.
Even if the titer count is high, it is not indicative that the cat is going to develop FIP, nor does it mean that the cat will be protected from the virus in the future.
The duration of protection is dependent to a great extent on the maternal antibody titer and the antibodies received by the infant during pregnancy.
Conversely, a woman sensitized by previous Rh-positive fetuses may have a high antibody titer during her pregnancy while the fetus is Rh-negative.
The TORCH test screens for the presence of IgM antibodies, and the titer determines their concentration in the blood.