delayed-type hypersensitivity (DTH) - a delayed hypersensitivity. See also cell-mediated immune response.
http://medical-dictionary.thefreedictionary.com/Delayed-Type+Hypersensitivity
cell-mediated immune response n. - The immune response produced
when sensitized T cells attack foreign antigens and secrete lymphokines
that initiate the body's humoral immune response. Also called
cell-mediated reaction, cellular immune response.
http://medical-dictionary.thefreedictionary.com/cell-mediated+immune+response
cell-mediated immune response - a delayed reaction of the immune
system, mediated primarily by sensitized T lymphocytes rather than
antibodies. Cell-mediated immune response reactions are responsible for
defense against certain bacterial, fungal, and viral pathogens; malignant
cells; and other foreign proteins and tissues.
Allergic
dermatitis
is an example of a cell-mediated immune response. Also called cellular
hypersensitivity reaction, delayed hypersensitivity reaction, type IV
hypersensitivity. Compare
anaphylactic hypersensitivity.
Mosby's Medical Dictionary, 8th edition. © 2009,
Elsevier.
http://medical-dictionary.thefreedictionary.com/cell-mediated+immune+response
allergy /al·ler·gy/ (al´er-je) a hypersensitive state acquired through exposure to a particular allergen, reexposure bringing to light an altered capacity to react. See hypersensitivity. aller´gic
http://medical-dictionary.thefreedictionary.com/allergy
hypersensitivity /hy·per·sen·si·tiv·i·ty/ (-sen″sĭ-tiv´ĭ-te) a state of altered reactivity in which the body reacts with an exaggerated immune response to what is perceived as a foreign substance. The hypersensitivity states and resulting reactions are usually subclassified by the Gell and Coombs classification (q.v.).hypersen´sitive
http://medical-dictionary.thefreedictionary.com/hypersensitivity
Greidanus TG, Honl BA.
Evans Army Community Hospital, Fort Carson, CO, USA.
RESULTS: Two patients, 39 and 23 years of age, were seen with acute optic
neuritis 1 month and 2 weeks, respectively, after anthrax booster
vaccination and successfully treated with intravenous methylprednisolone.
The first patient had a typical presentation and course of unilateral
retrobulbar optic neuritis with excellent visual recovery. The second
patient had a bilateral anterior optic neuritis and
has required chronic
immunosuppression to maintain his vision. Retinal and optic
nerve autoantibodies were present in the second patient. No cross-reactive
epitopes between anthrax vaccine and retina/optic nerve were identified.
CONCLUSION: Optic neuritis is a potential adverse reaction of anthrax vaccination.
Mil
Med 2002 Jan;167(1):74-5
http://www.vaccinationnews.com/Scandals/feb_8_02/AnthrVaxReactionsLS.htm
Robert A. Wood, MDa , Melvin Berger, MD, PhDb , Stephen C. Dreskin, MD,
PhDc , Rosanna Setse, MD, MPHd , Renata J.M. Engler, MDe , Cornelia L.
Dekker, MDf , Neal A. Halsey, MDa,d the Hypersensitivity Working Group of
the Clinical Immunization Safety Assessment (CISA) Network
...Although these per-dose estimates suggest that true
hypersensitivity
reactions are quite rare, the large number of doses that are
administered, especially for the commonly used vaccines,
makes this a
relatively common clinical problem....
[And this is only an immediate
allergic reaction to an ingredient in the vaccine that is being addressed.
Since the food particles vary from shot to shot, food allergies to traces
of food protein from the oils in the adjuvant may or may not occur when a
vaccination is given. - bfg]
Delayed-type reactions occur
hours to days after exposure.27 The longest possible interval
between exposure and the onset of symptoms is not completely clear,
although most immunologists agree that reactions
may occur up to 2 to 3 weeks after exposure. Most delayed
reactions are classified as type 3 hypersensitivity and are attributed to
formation of immune complexes, although
other less well-defined
mechanisms, including T cell–mediated processes,
may also play a
role. The most common signs of delayed-type reactions are rashes,
which may include urticaria, erythema multiforme, and/or maculopapular
eruptions. Although urticaria and angioedema are generally thought of as
manifestations of immediate-type reactions,
they can occur in delayed
reactions as well. In the context of a delayed reaction, this is
likely attributable to non–IgE-mediated processes such as complement
activation by immune complexes,
but late activation of the IgE system cannot be ruled out. Angioedema
may also occur, especially in association with urticaria or erythema
multiforme. Although uncommon, arthralgias,
arthritis,[arthritis
is an uncommon reaction? How do you know that? Arthritis is very common.
Few doctors would connect arthritis with a shot given two weeks beforehand
- bfg] joint swelling, serum sickness, and Henoch-Schönlein
purpura may occur, as can a variety of other hematologic, renal, and
gastrointestinal manifestations....
When deciding on administering additional doses of a vaccine that has been
temporally associated with a hypersensitivity reaction, the risks for
immediate and delayed type reactions differ considerably. IgE-mediated
reactions have far more potential to cause life-threatening symptoms, such
as airway obstruction, hypotension, and full-blown anaphylaxis. Although
non–IgE-mediated delayed-type reactions may be very uncomfortable, they
are rarely dangerous....
[But since they have not even considered the food allergies as being
caused by the vaccines, and the other health problems that they are
probably discounting as being due to the vaccine, "rarely dangerous" means
what? The risk of getting sick from a disease that the vaccine supposedly
prevents is less than getting a serious side effect from the vaccine. But
they haven't added in all of the serious side effects! - bfg]
Published online September 1, 2008
PEDIATRICS Vol. 122 No. 3 September 2008, pp. e771-e777
(doi:10.1542/peds.2008-1002)
http://pediatrics.aappublications.org/cgi/content/full/122/3/e771
First, what is the difference between an allergy and a side effect? As with any medication, vaccines can have side effects such as fever, rash or local redness or swelling. This is not an allergy. An allergy is when the body reacts to a specific substance. An allergic reaction can be a rash, shortness of breath or swelling of the face, and these, almost immediately, or within an hour after the injection. As an example, the MMR (Measles, Mumps, Rubella) vaccine can cause a rash that occurs 7-10 days after the infection. This is not an allergic reaction. This is a side effect of the MMR vaccine itself. [So the allergy that the MMR may cause to one of the ingredients in the vaccine, if it doesn't react immediately, is a side effect and not an allergy because IgE may or may not be involved? But what about all the other Ig- responses - IgM... etc? How many ways can we split a hair? - bfg]
http://www.drpaul.com/library/VACALLERGY.html
December 2007
Q. My wife can’t take penicillin or any drug in the penicillin family. She
says she’s allergic to penicillin, but her doctor calls it a “drug
hypersensitivity.” What’s the difference? [Splitting hairs....
terminology.... medical BS..... - bfg]
A. An allergic reaction to a drug is one form of drug hypersensitivity.
Both fall under the larger category of adverse drug reactions—unwanted
effects of a particular medication. Most adverse drug reactions don’t
involve the immune system, but both allergy and hypersensitivity do. They
occur when a person’s immune system reacts to the medication or to
substances produced when the body processes the medication.
An allergic reaction most
frequently occurs when the drug is given either intravenously (into a
vein) or by injection. It is less likely when a drug is taken by mouth.
[Read it
again. An allergic reaction is more likely to occur from an injection than
eating something... - bfg] The
allergic reaction occurs only when a person has had a previous exposure to
the medication....
[Babies are not BORN ALLERGIC!!
It comes from the vaccination they are given often before they leave the
hospital to go home!!! - bfg]
Symptoms of drug hypersensitivity include hives or a skin rash, wheezing,
and swelling. The most serious reaction is anaphylaxis, which is
potentially life-threatening and thus a medical emergency. Although these
symptoms generally occur within minutes to hours after taking the drug,
they can also appear a week after the medication has been discontinued.
[And is there any reason to
think that this cannot occur from a vaccination? -bfg]
http://www.healthmonitor.com/asktheexperts/allergiesasthma/
The first DTH reaction described used only the tuberculin antigen
(tuberculin reaction), but the definition was later expanded to include
cell mediated reactions to other bacterial and viral antigens,
responses to pure protein with
adjuvant or haptens, and host responses to allograft.
Tuberculin Reaction
The classic form of DTH is
induced by injecting an antigen preparation
of Mycobacterium tuberculosis
intradermally....
Jones-Mote Hypersensitivity: Protein-Adjuvant Reactions
Closely
related to the tuberculin reaction, is the
host response to pure protein
mixed with an adjuvant. This form of DTH was discovered in 1929
by Louis Dienes. He demonstrated that when ovalbumin, an egg white protein
that is normally not immunogenic, is injected into a tuberculosis
tubercule, the patient would become sensitized to the protein.[10] Later
with the introduction of Freund's adjuvant, the reaction could be mimicked
by mixing the protein with killed mycobacterium in oil.[11]
When it was discovered that any
pure protein mixed with adjuvant could induce an immune response,
the DTH reaction was termed the Jones-Mote reaction since it was
fundamentally different from the tuberculin reaction in one remarkable
aspect.[12,13] ...
Finally, it is necessary to view DTH not as an individual phenomenon but
rather a group of related responses to antigen. These include the
tuberculin reaction, Jones-Mote reaction, contact hypersensitivity and
graft vs. host disease.... It is clear that cell mediated immunity must be
highly adaptable and therefore variable. The phagocyte (monocyte/macrophage)
is involved in all of these responses, sometimes as a host for the
pathogen, but more often as an effector cell. The exact mechanism by which
the macrophage is activated is still being debated but it is clear that a
T cell is required to initiate the response. When T cell or macrophage
function is compromised the entire complement of cell mediated immunity is
affected.
This leads to a
profoundly immunocompromised state in the host. Of course,
in infection this can be lethal, but in allograft rejection it can be life
saving. Finally, DTH must be viewed not as a host response in and of
itself but rather one component of an interrelated coordinated host
response to disease.
http://dermatology.cdlib.org/DOJvol5num1/reviews/black.html
No one knows exactly what causes JRA [Juvenile Rheumatoid Arthritis]. Scientists do know it is an autoimmune disorder, which means your immune system, which normally helps your body fight infection, attacks your body's own tissues. Medicines and physical therapy can help maintain movement and reduce swelling and pain. [Looks like Juvenile rheumatoid arthritis is most probably caused by vaccinations!!! - bfg]
National Institute of Arthritis and Musculoskeletal and Skin Diseases
http://www.nlm.nih.gov/medlineplus/juvenilerheumatoidarthritis.html
[Added 2/7/2014]
Serious side effects from vaccines are rare, which indicates that the benefits inherent in their administration outweigh the possibility of a patient's developing a reaction to them.
A comprehensive table lists all Food and Drug Administration (FDA)-approved vaccines and pays particular attention to quantities of the components aluminum, thimerosal, formaldehyde, 2-phenoxyethanol, and neomycin. [1,2] Although other constituents of vaccines, such as egg protein and gelatin, can cause immediate immunoglobulin E (IgE)-mediated hypersensitivity reactions, this article will focus primarily on delayed hypersensitivity reactions; as such, egg protein and gelatin will not be further discussed.