A positive IgG result simply means that you have been infected at some point in your life;

it cannot tell you when. The IgM antibody test can tell us whether the infection was recent. A

negative IgM result usually means that you've been infected in the past and are now immune

to the parasite.Depending on the test value, positive results are defined as a value of ≥5

IU/ml, equivocal results range from 3 to 5 IU/ml, and negative results are defined as a value

of <3. IU/ml.