1.Skin diseases of cattle Flashcards
List the categorys of skin diseases?
- General Skin diseases
- Acquired
- Viruses
- Bacterial
- Fungal
- Parasitic
- Neoplastic
Describe the General Skin diseases in cattle?
General: Alopecia/ hair loss in cattle
- Congenital (hereditary) alopecia
o Hypotrichosis congenita generalisata: Holstein Friesian
o Hypotrichosis congenita areata: Hereford
- Acquired alopecia/ hair loss
o Alopecia acquisita: B2 vitamin, Zn deficiency, cachexia, severe chronic diseases
- Partial signs of acquired skin diseases
o With other dermatological signs
§ Scabies, Trichophytiasis, louse infection
Describe the general skin diseases in Sheep?
General: loss of wool (alopecia) in sheep
- Chronic weight loss, cachexia
o Pseudotuberculosis, endo/ectoparasites
- Nutritional problem/ deficiency
o Protein, Co, Se deficiency
- Wool (fleece) eating
o End of the winter, housing
- Scabies
• + Lichenification, scaling, pruritus
Causes of photodermatitis in cattle and sheep(primary)?
Photodermatitis in cattle and sheep
• Primary photosensitization
o Plants containing photosensitizing (photogenic) substances
§ Hypericum perforatum (St. John’s wort)- hypericin
§ Fagopyrum esculentum
§ Lupinus albus, trifolium spp, brassica spp
Causes of secondary Photosensitisation in cattle and sheep?
Secondary photosensitization
o Aberrant pigment synthesis: inherited congenital porphyria
o Hepatogenous photosensitization: phylloerythrin accumulation
o Plants containing hepatotoxins
§ Lupinus spp, periconia spp, fungus
o Chemical
§ CCl, corticosteroids
What are the clinical symptoms of photodermatitis in cattle and sheep?
- Sunshine- hyperpigmented areas
- • Oedema, weeping, gangrene
- • On the head, extremities, udder
What is the treatment of photodermatitis in cattle and sheep?
No sunshine, eliminate etiological factors
• Laxatives
• Topical treatment
o Ichthyol, antihistamines, AB
What are the acquired skin diseases in cattle?
- Allergic dermatitis
- Post vaccinal allergic dermatitis
- Fleece rot of sheep
- Urticaria
- Allergic dermatitis: milk allergy/ urticaria due to missing milking event
Allergic dermatitis in Ruminants causes, clinical symptoms and treatment?
Allergic dermatitis in ruminants
• Dermatitis on the legs
o Potato poisoning, topical application of irritants (diazoline), dirty straw (sheep)
Clinical symptoms
• Exanthema (skin rash), vesicles (blister)
o Purulent/ necrotic processes
Treatment
- Change of feeding
- Local treatment
- Antihistamines
- Dry, clean straw
Post-vaccinal allegric dermatitis?
Post-vaccinal allergic dermatitis
• After FMD (food and mouth disease) vaccination
o Neck, extremities, udder
o Papules- serum- scab
Fleece rot of sheep and urticaria?
Fleece rot of sheep
• Constant wetting
Urticaria
- Acute allergic dermatitis
- Vaccination, blood transfusion, drugs, inhaled allergens, bacteria, parasites
Allergic dermatitis?
Allergic dermatitis: milk allergy/ urticaria due to missing milking event
• Treatment
o Prednisolone, noradrenaline, antihistamines
Viruses causing skin diseases?
Foot and mouth disease
Malignant catarrhal fever
pestivirus
papillomavirus
Lumpy skin
Foot and mouth disease?
Foot and mouth disease- Aphtovirus
• Nose, mouth, hoof
Clinical signs
• Vesicles, erosions, scales, detached hooves
Diagnosis
- Large epidemic
- High fever, Dermatological signs
- Swine can also be affected
Differential diagnosis
• Traumatic, allergic dermatitis, laminitis, mycotoxicosis (mouth)
Malignant catarrhal fever?
Malignant catarrhal fever- Herpesvirus
- Head, udder, scrotum, thigh
- Necrosis, ulcers
- Peripheral keratitis, vulva
