Exam 2: Hypersensitivity Type 4 Flashcards
Inflammatory response in the skin of an animal infected with tuerculosis following intradermal injection of tuberculin
Tuberculin
Another name for type 4 hypersens.
delayed hypersen.
Which IR does type 1-3 hypersens. belong to?
humoral
Which IR does type 4 hypersens. belong to?
Cellular IR
If animals come into contact with this bacterium ______ you may see a false positive to Tuberculin test.
Mycobacterium phlei
What are the 4 diff tuberculin tests in cattle?
- single intradermal
- comparative
- short thermal
- stormont
When would you us a single intradermal TB test?
routine testing
When would you use a Comparative TB test?
when avian or johne dz
When would you use a short thermal TB test?
postpartum
When would you use a Stormont TB test?
Postpartum
Besides TB what other tests utilize type 4 hypersen.?
- johnin
- Brucella abortus
- histoplasmin
- coccidioidin
What is Allergic Contact Derm.?
if reactive chemicals are painted onto skin, they may bind to skin P, and resulting complexes are processed by Langerhans’s cells in the dermis
What is an ex. of allergic contact derm?
poison ivy
Type of dermatitis caused by type 1 hypersens.
atopic derm
What type of dermititis is caused by type 4 hkypers.
allergic contact derm.
