Other factors to consider
Some
patients may actually become immuno-tolerant of an antigen.
With the passage of time, antibody levels can fall below detectable
limits if there has been no recurrent exposure to the antigen. However,
memory lymphocytes may continue to be resident which are capable
of eliciting a massive response should new exposure to that antigen
occur. Such condition may not be detected at the time of testing
and could pose a problem later. The problem of immuno-tolerance
or non-response is below 5% in general population longitudinal testing.
Cross-reactivity
Cross-reactivity may occur in testing when an antibody manufactured
in response to one antigen cross-reacts with a different antigen.
We believe that while this may occur as a false positive in testing,
such cross-reactivity will also be possible in-vivo and is therefore
a valid consideration for avoiding the use of materials in question.
Adjuvant effects
may occur with some constituents such as aluminum and mercury when
chemical groups that the patient might normally handle well, react
adversely due to amplification of their properties by the adjuvant.
These reactivities often disappear over a period of months in longitudinal
testing sequences when the adjuvants are removed from the body and
lifestyle of the patient.
This may become
a factor for temporization of sensitive patients with benign temporary
materials for a period of months prior to final placement of long-term
materials. It is not unusual to see some reactivity levels drop
below detection limits, and even for some allergies to abate completely
with adjuvant removal.
Future
reactivity
testing of this type cannot predict future reactivity for materials
which do not presently react. We have found that most people have
come in contact with a sufficient variety of materials and substances
to form a mature bio-record by the age of puberty. New reactivities
in adult patients do not seem to occur often. Pediatric patients
are not nearly as stable nor biologicaly experienced as their immune
records have not fully matured. Therefore, caution should be used
in considering and ordering this kind of testing for children.
Long-term
application of immuno-suppressive therapies or steroids
Long-term application of immuno-suppressive therapies or steroids
may interfere
with antibody production generally. Patients on such therapies may
not have adequate levels of antibody response to chemical groups
to be reliably detected in testing. Nutritional supplements and
antibiotics are not known to induce such problems.
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