Yes, it's possible that varicella titer is positive, and then negative. The CDC does not recommend revaccination in this case.
In terms of chemistry, a titer is a specific way to express a solution's concentration. The process of titer testing uses serial dilution to obtain quantitative information that is either negative or positive.
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You appear to be confused about the nature of shingles. A positive varicella titer shows that you have had chickenpox in the past, or that you have had the vaccine for chickenpox. You can't get shingles unless you've had chickenpox. If you have had chickenpox, a positive varicella titer is not protective against shingles, and you may need the vaccine. Discuss with your health care provider whether shingles vaccine makes sense for you.
The ANA titer is the number of times the blood sample has to be diluted before a sample remains that has no antinuclear antibodies. The first dilution is 1:40, then 1:80, then 1:160, then 1:320. The ANA number does not correlate to the level of disease activity. Many people have a positive ANA and no disease at all. In lupus, the immunofluorscent pattern is of more significance than the titer. A speckeld pattern points to the likelihood of lupus.
1:80 titre is significant for determination of widal positive.
a blood test to determine if you have immnuity to varicella (chicken pox).
The lab test ordered for Measles, Mumps, and Rubella (MMR) titer is typically a serology test that measures the levels of specific antibodies against each of these viruses in the blood. This test helps determine if a person is immune to these diseases, either from prior infection or vaccination. A positive titer indicates immunity, while a negative titer may suggest the need for vaccination.
The geometric mean titer is important in assessing vaccine effectiveness because it provides a more accurate representation of the antibody levels in a group of individuals. By calculating the geometric mean titer, researchers can better understand the overall immune response to the vaccine and determine its efficacy in protecting against the targeted disease.
MMR titer will not detect THC.
A positive titer indicates the presence of specific antibodies in the blood, suggesting that the individual has been exposed to a particular pathogen or has been vaccinated against it. This result typically signifies an immune response to an infection or vaccine, implying potential immunity. It is often used in medical assessments to determine immunity levels or the need for booster vaccinations.