Psoroptic Mange


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Psoroptic Mange

 

an animal disease characterized by itching, skin inflammation, loss of hair, and emaciation. Psoroptic mange is caused by mites of the genus Psoroptes. Different mite species occur in different species of farm animals.

Psoroptic mange causes the greatest economic damage to fine-wooled sheep raising and rabbit breeding. The disease generally appears in the winter or early spring, when the hair of the animals is quite thick and the humidity of the air near the skin is high. A female mite deposits 40 to 60 eggs in a lifetime; the development of a generation takes 14 to 20 days. Mites remain viable outside the host’s body for up to two months.

Infection occurs when healthy animals come in contact with diseased individuals or grooming utensils that have been used on diseased animals. Crowded maintenance conditions and inadequate feeding foster the spread of psoroptic mange. Diagnosis is based on clinical symptoms and the results of laboratory analysis of skin scrapings. Control measures include the destruction of mites on the animals’ bodies, in the pasture, on grooming utensils, and in barns.

REFERENCE

Dubinin, V. B. Chesotochnye kleshchi, ikh biologiia, vred v sel’skom khoziaistve, meryprofilaktiki i bor’by s nimi. Moscow, 1954.

V. I. POTEMKIN

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Treatment of psoroptic mange in a goat- A case report.
Dr Mary Vickers, a senior beef scientist with the English Beef and Lamb Executive (Eblex), said: "Experience from continental Europe, Ireland and the USA where it has long been recognised, suggests psoroptic mange could easily become a very common as well as highly debilitating UK disease if effective action is not taken to control it.
She said that products typically used to control mange in cattle - primarily macrocylic lactones like the ivermectins, doramectin and moxidectin and some synthetic pyrethroids - are not always effective against psoroptic mange.
Dr Vickers said: "Producers are strongly advised to keep a close eye open for problems this winter and consult their veterinary surgeons without delay wherever psoroptic mange is suspected.
The method of application for topical treatments of psoroptic mange, as in the case of Acacerulen R[R], often suggests to collect the scabs prior the treatment; however, in this study both essential oil and Acacerulen R[R] showed that the presence of scabs do not reduce their therapeutic efficacy.
zeylanicum oil could represent a possible alternative for the topical treatment of psoroptic mange in rabbits and encourage further studies to evaluate its efficacy also on other mange mites responsible for otoacariasis, such as Otodectes cynotis, or skin diseases, such as Sarcoptes scabiei, in other animal species and in humans (Arlian, 1996; Wrenn, 1996).
2012) compared efficacy of Ivermectin and doramectin in rabbits affected with Sarcoptic and psoroptic mange and reported that Ivermectin @ 400pg/kg subcutaneously was more effective than doramectin.
Clinical examination indicates the probability of psoroptic mange and the diagnosis must be confirmed by microscopic examination of scab material from ear (Ribbeck, 1976).