Thanks. Am planning on retesting but did a little research and apparently, the IgM results for zoster are also known to be inaccurate in many cases. See below from a paper called "Serology and DNA detection in shingles" -- they found lots of problems. It certainly would explain my situation!
"Surprisingly low prevalence of VZV IgM antibodies (9%) was detected by the EIA in the acute zoster sera and the majority of zoster patients (38%) also remained IgM negative in the convalescent sera. The frequency of IgM antibodies in the zoster patients described by other authors varied widely from 10 to over 70% depending on the method used, the patients’ clinical status and the time of specimen collection. However, even with the most sensitive test system IgM responses were not detected in a satisfactory proportion of patients and the IgM assay is not a particularly helpful approach to zoster serodiagnosis."
With the IgG neg HSV results and the physical unlikelihood of me having contracted HSV from a single sexual encounter with my husband over 4 weeks before my "outbreak", it seems unlikely that I have HSV.
Thanks again for your time, I will update you with results.
You should be sure he tested with the swab for both HSV and VZV- some commercial tests test only for HSV and miss VSV. VZV also typically takes longer to grow than HSV.
When you re-test please let me know. EWH
Hello and thank you so much for the thoughtful response. Yes, I am on the zoster-recommended dosage of Valtrex. Within a day of taking it, the symptoms (pain etc) abated significantly.
The doctor said that there was very little liquid in the lesions to culture, and that perhaps that was why the test came back negative (for everything: I assume he swabbed for HSV and VSV).
I am just so confused: this was such a painful episode. What else cause lesions and pain like this? If zoster, why would I have a negative iGm result? and an iGg of 2.86? If HSV, why am I testing iGg negative? It is very distressing. Thanks again: I keep trying to remind myself that there are far more serious medical problems that I and my husband may face in the future, yet I still am so confused and upset by this.
Welcome to the Forum. I'm sorry you have to struggle with this dilemma. There are several things I need to say that I think will help to sort this out.
First, I'm afraid your doctor is incorrect. The fact is that positive IgM tests are not reliable and are often falsely positive because they detect not only IgM antibodies but also IgG antibodies. Thus it is possible and perhaps probably that your "positive" IgM test is actually detecting IgG antibodies.
Second, you need more information. I'm troubled that your culture tests were negative. If your lesions were due to HSV, five days into your outbreak the tests should have been positive. I do agree that repeat antibody tests a month after your outbreak may be helpful and would test for HSV-1, -2 and Herpes zoster. I would not test for IgM of any sort.
Third, the timing of your outbreak also is not consistent with herpes but it is compatible with Herpes zoster which can occur at almost any time. Typically initial episodes of HSV occur between 4 and 14 days after an exposure. As I understand your post, it was 4-5 weeks between your last episode of sex and the beginning of your outbreak- this is not suggestive of HSV.
I see no reason to assume that your husband has cheated on you and will not suggest it. Asking your husband to get type specific HSV antibody tests might also be helpful in sorting out what has happened.
I'm sorry I don't have better answers for you at this time. As I said, more information might help us. In addition, as a side comment, I need to ask if you are taking therapy for your illness. Whether or not this is herpes zoster or HSV, you should be on therapy for the outbreak. Drugs such as valacyclovir will help whether this is zoster or HSV. EWH