Urticaria

urticaria of pet animal for fourth drade

1. 5- Urticaria

2. Urticaria Hives
Definition.
•A skin disorder characterized by
multiple plaque-like eruption which
are rounded, elevated and flat-topped
(wheals).
•The lesion is formed by localized
edema in the dermis often develop
and disappear suddenly

3. Causes
I-Exogenous causes:
1.Toxic irritant product of some stains.
2.Sting or bites of insects. It is usually occurs in
summer.
3.Chemical as: turpentine oil.
II- Endogenous causes:
1.After inhalation or absorption of ingested
allergens Atopic dermatitis.
2.After injection of foreign proteins serum,
vaccines, bacteria or antibiotics e.g
penicillin.
3.Associated with internal parasites.

4. Symptoms
1.Sudden appearance of
wheals or eruptions
within few minutes or
hours of exposure.
2.It may be preceded by
fever, dullness and loss
of appetite.
3.The skin lesions are 1-5
cm diameter with
rounded shape and with
flat-top appearance.

5. Wheals

6. Treatment:
1.Epinephrine I.V. 1/1000 0.1-0.5 ml
2.Antihistaminics (Avil) I.V. 2 mg/kg. B. wt.
In 4 divided doses.
3. Adrenocorticosteroid, hydrocortisone
sodium succinate 100-500 mg I.V.
4.Cold packs of water, ice, vinegar or 70 %
alcohol for sedation.
5.No local treatment is necessary.

7. Questions