Trichophyton For Intradermal Skin Testing
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Questions & Answers
Side Effects & Adverse Reactions
Physicians who use allergenic extracts should have a knowledge and practical understanding of allergy skin testing as described in the published literature6,7,8.
Allergenic extracts are manufactured to assure high potency and therefore have the ability to cause serious local and systemic reactions, including death in highly sensitive patients5. Patients should be informed of the risks of skin testing and instructed in the recognition of symptoms of an adverse allergic reaction (see PRECAUTIONS and ADVERSE REACTIONS below).
Excessively large local reactions or systemic reactions are more likely to occur if the patient is skin tested shortly after exposure to allergens to which he or she is sensitive.
Legal Issues
There is currently no legal information available for this drug.
FDA Safety Alerts
There are currently no FDA safety alerts available for this drug.
Manufacturer Warnings
There is currently no manufacturer warning information available for this drug.
FDA Labeling Changes
There are currently no FDA labeling changes available for this drug.
Uses
Intradermal skin tests with Trichophyton extract are indicated for use in persons who are suspected of having Type I hypersensitivity (i.e. allergy) to the fungus.
History
There is currently no drug history available for this drug.
Other Information
Trichophyton extract for diagnostic skin testing is a sterile solution that is prepared by extracting allergenic source material of equal parts of Trichophyton mentagrophytes and Trichophyton rubrum with an aqueous solution of 0.25% sodium chloride, 0.125% sodium bicarbonate and 50% glycerol v/v. Phenol is added at 0.4% w/v as a preservative. Extract for intradermal administration is diluted with the above solution without glycerol.
WEIGHT BY VOLUME (W/V) Weight by volume refers to the weight of raw product added to a measured volume of extraction solution. A 1:500 w/v extract contains 1 gram of source material in 500 mL of solution. The w/v designation refers to concentration rather than potency. Extract labeled w/v has no U.S. Standard of Potency.
Sources
Trichophyton For Intradermal Skin Testing Manufacturers
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Allermed Laboratories, Inc.
![Trichophyton For Intradermal Skin Testing (Trichophyton Mentagrophytes And Trichophyton Rubrum) Injection [Allermed Laboratories, Inc.]](/wp-content/themes/bootstrap/assets/img/loading2.gif)
Trichophyton For Intradermal Skin Testing | Allermed Laboratories, Inc.
Prior to administering skin tests, the skin should be cleaned with alcohol and allowed to dry completely. The tests should be placed on the volar surface of the forearm and four rows may be placed on the back.
INTRADERMAL TEST The intradermal test is performed by administering 0.1 mL of extract into the skin. The injection should be given as superficially as possible creating a distinct bleb approximately 5 mm in diameter. The tests should be examined after 15 - 20 minutes and read as negative or positive. Test sites that show a wheal and flare response should be measured and reported in mm of edema and erythema or scored as 1+ to 4+ based on a mm reference scale. Induration after 24 - 48 hours can occur in some individuals and also may be recorded in mm.
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