What diseases cause skin bleeding and necrosis in chickens?
Diseases in chickens that cause skin bleeding, necrosis and other lesions include:
[Colibacillosis (cutaneous form)]
Similar symptoms: omphalitis, dermatitis.
Distinguishing symptoms: omphalitis in chicks, dermatitis, necrosis and ulceration in growing chickens, some forming purple scabs; Gram-negative small bacilli visible on smear microscopy.
Treatment: norfloxacin 0.5g/kg feed, fed continuously for 3-5 days; or ciprofloxacin, 0.1-0.3g per kg water, drunk continuously for 3-5 days; with chloramphenicol, add 1-3g per kg feed, fed continuously for 3-5 days; or gentamicin, 10,000-20,000 units per kg body weight, twice daily for 2-3 days.
[Staphylococcosis]
Similar symptoms: omphalitis, subcutaneous hemorrhage.
Distinguishing symptoms: omphalitis in chicks; acute septicemic form common in 1-2 month old chickens, with hemorrhage and ulceration of the skin on the chest, abdomen and inner thighs, subcutaneous hemorrhage and edema appearing gelatinous; staphylococci visible on smear microscopy.
Treatment: 1. Ciprofloxacin: 0.5g per kg added to feed; in drinking water, add 0.2-0.3g per kg water, used continuously for 3-5 days. 2. Gentamicin: ineffective orally, intramuscular injection: 10,000-20,000 units per kg body weight, twice daily for 3-4 doses. 3. Erythromycin: 5% water-soluble preparation, add 1-3g per kg water, drunk continuously for 5-7 days.
[Marek's disease (cutaneous form)]
Similar symptoms: nodular swelling of the feather follicles on the skin of the neck, back and legs.
Distinguishing symptoms: small nodules or tumor-like growths centered on the feather follicles on the neck, both wings and the whole body skin, sometimes with scaly brown hard scabs.
Treatment: no effective therapeutic drugs, mainly relies on effective immunization.
[Fowl pox (cutaneous form)]
Similar symptoms: sometimes scabs form on the surface of the pox lesions.
Distinguishing symptoms: pox lesions appear on skin with little or no feathers, such as the comb, wattles, corners of the mouth, eyelids and legs.
Treatment: there is no specific drug for this disease, mainly relies on preventive vaccination; for attempted treatment: 1. To prevent secondary infection, 0.1-2% oxytetracycline or 0.05-0.1% chloramphenicol can be mixed into feed; 2. 0.01% erythromycin can also be given in drinking water, both used continuously for 3-5 days.
[Vitamin PP deficiency]
Similar symptoms: dermatitis.
Distinguishing symptoms: scaly dermatitis on the skin of both legs, black tongue lesions and inflammation of the mouth and esophagus.
Treatment: add 30-40mg of niacin per kg feed, fed continuously for 5-7 days. If joint swelling occurs, treatment is difficult and the birds should be culled.
[Vitamin H deficiency]
Similar symptoms: dermatitis.
Distinguishing symptoms: dermatitis first appears on the toes, later at the corners of the mouth and around the eyes; liver and kidney enlargement and fatty liver in broilers.
Treatment: add 0.15mg of biotin per kg feed.
[Pantothenic acid deficiency]
Similar symptoms: dermatitis.
Distinguishing symptoms: dermatitis occurs first at the corners of the mouth, the edges of the eyes and the legs, and in severe cases spreads to the soles of the feet.
Treatment: add 20-30mg of pantothenic acid per kg feed, used for 2 weeks, while increasing the dosage of multivitamins.
[Zinc deficiency]
Similar symptoms: none
Distinguishing symptoms: severe keratinization of the stratum corneum of the skin on the feet and legs, cracked soles with deep fissures, and even necrotic dermatitis of the toes.
Treatment: add 5-10g of zinc sulfate per 50kg feed, while increasing the dosage of VE as adjunctive treatment.