From the initial May 2007 lab report of my Chlamydia pneumoniae Differentiation Antibody Panel (IgM. IgGi, IgA) results;
Laboratory Reference Range:
IgM < 1:16 Antibody not detected
IgG < 1:32 Antibody not detected
IgA < 1:16 antibody not detected
IgG titers of 1:32 or greater may indicate past exposure to a particular species. Titers of 1:128 or less may be due to cross-reactive antibody or a non-specific stimulation of chlamydial antibody Infectiown with a particular species usually yields antibodies of a higher titer than with non-infecting species. IgG titers in recently infected individuals are usually greater than or equal to 1:512.
IgA titers may be elevated in recurrent or chronic infections and may be helpful in identifying the infection species of Chlamydia when cross-reactive IgG is present.
My results were IgM - <1:16 This is within In Range Reference range Antibody not detected
IgG - 1:512High This is out of reference range which is <1:32
IgA - 1:512High This is out of reference range which is <1:16
My dxii is CFSii and I had a high bacterial loadii although the IgM has not indication of recent infection. My IgG and IgA indicate CHRONIC infection as I see it. C.Pn. was problematic for me as a persistent chronic intracellularii infection.
However, depending on the target sites of CPn in your body this could all come out negative.
This is the point here in not relying on lab data to dx as negative for CPn, and the point for emperical treatment.
My result is somewhat unusual because I recall several episodes of a respiratory infection that in retrospect in the late 1980's, which could been have classified for the Dx "walking" pneumoniae for which I did not seek antibiotic therapy ( in those days I was pretty anti-antibiotic, thinking that the body would triumph over whatever, I was sick but able to function. I hear folks like this coughing for extended periods of time and now think C.Pn.)