EXTERNAL PARASITES MANGE SYNONYMS Scab Acariasis Itch DEFINITION
EXTERNAL PARASITES (MANGE)
SYNONYMS Scab Acariasis Itch
DEFINITION Mange is a chronic infectious disease of all domestic animals caused by different species of mites characterized clinically by dermatitis, crust formation & itching.
Distribution: q. Widely distributed all over the world q. It is endemic in Egypt
Sources of infections & mode of transmission: q. Through direct contact q. Infected fomites
PATHOGENESIS All forms of life cycle occur on host. After copulation, the female mite burrow in the skin lying eggs. They are highly active at the edge. Larval, nymphal and adult stages
PATHOGENESIS CONT. , Due to feeding and burrowing…allergic exudative dermatitis. Hypersensitivity, pruritus and rubbing against hard objects.
CHORIOPTIC MANGE
ETIOLOGY Chorioptic bovis Chorioptic equi Chorioptic ovis
CHORIOPTIC MANGE Tail mange Leg mange Foot mange
CHORIOPTIC MANGE Lesions are most commonly seen on: The rump Tail Perineum Caudomedial thigh Caudal udder Scrotum The distal hind legs and teats
CHORIOPTIC MANGE Erythema Papules progress to scaling Oozing, crusts, and alopecia. Pruritus Varies from mild to intense
PSOROPTIC MANGE BODY MANGE
ETIOLOGY Psoroptes natalensis Psoroptes equi Psoroptes ovis
PSOROPTIC MANGE Sheep scab Body mange Ear mange
PSOROPTIC MANGE Skin thickening Hair loss Severe pruritus Lesions are on: Ears Withers Whole body Occasionally on the rear of animal and extend to vulva.
PSOROPTIC MANGE Papules, pustules, exudation, crusts, alopecia, and excoriations. Pruritus Skin is intense. becomes lichenified (lichen) and thickened with chronicity
PSOROPTIC MANGE Skin involvement and secondary bacterial infections are common. Intense unremitting pruritus results in annoyance, irritability……………. q. Humans are not affected
SARCOPTIC MANGE
ETIOLOGY Sarcoptic scabie var bovis Sarcoptic scabie var equi Sarcoptic scabie var cameli
SARCOPTIC MANGE Bran itch Scabies Head mange
SARCOPTIC MANGE Lesions are most commonly seen on: Face Pinnae Neck Shoulders Rump
SARCOPTIC MANGE Erythema papules progress to scaling oozing, crusts, and alopecia. Excoriation, lichenification hyperkeratosis are prominent in chronic cases
DEMODECTIC MANGE
DEMODECTIC MANGE Follicular mange Demodicosis
ETIOLOGY Demodex bovis Demodex capri Demodex ovis Demodex equi
DEMODECTIC MANGE This mite is a normal resident of hair follicles. Immunocompromised Concurrent disease Poor nutrition Debilitation Stress Genetic predilection
DEMODECTIC MANGE Lesions consist of multiple (from 10 to hundreds) dermal papules and nodules, 0. 5 to 2 cm in diameter. The overlying hair coat and skin surface are normal, and the lesions are neither painful nor pruritic. Occasionally, draining tracts, ulcers, abscesses, crusts, and alopecia may be seen when follicular rupture and/or secondary bacterial.
DEMODECTIC MANGE Lesions are most commonly seen over the neck, shoulders, brisket, and forelegs, and occasionally on the back, flanks, head, and hind legs.
DIAGNOSIS Case history Clinical signs isolation and identification.
Treatment For non-lactating: Lindane 0. 03% Malathion 0. 5% Coumaphos 0. 06% Diazinon 0. 01 -0. 02% Ivermectin 0. 2 mg /kg bw Lactating animals: Lime sulphur 2%
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