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Home Science & Tech

Mange disease

April 5, 2022
in Science & Tech
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Mange disease
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In news- Recently, wildlife conservationists have expressed concern after locals spotted a few desert foxes, found in the scrub forests of Rajasthan’s Jaisalmer district, suffering from a loss of fur due to the mange skin disease.

About mange disease-

  • Mange is a skin disease of animals caused by mite infestations, characterized by inflammation, itching, thickening of the skin, and hair loss. 
  • As various species of mites also infect plants, birds and reptiles, the term “mange” is sometimes reserved for pathological mite-infestation of nonhuman mammals.
  • Since mites belong to the arachnid subclass Acari (also called Acarina), another term for mite infestation is acariasis.
  • Parasitic mites that cause mange in mammals embed themselves in either skin or hair follicles in the animal, depending upon their genus.
  • Some form of mange is known in all domestic animals, although many varieties of mange mites infest only one species. 
  • They are transmitted between animals by direct contact and by objects that have been in contact with infested animals. 

There are two types of the disease–

Demodectic mange-

  • Also called demodicosis or red mange, it is caused by a sensitivity to and overpopulation of Demodex spp. 
  • The two types of demodectic mange are localized and generalized, localized consists of four spots or less. 
  • Demodex is not zoonotic and is not transferable across species. 
  • Each host species has its own species of Demodex. 
  • For example, dogs are hosts to Demodex canis and cats are hosts to Demodex cati. A type of demodectic infection in humans is known, but is less commonly symptomatic. 

Sarcoptic mange-

  • Sarcoptic mange, also known as canine scabies, is a highly contagious infestation of Sarcoptes scabiei var. canis, a burrowing mite. 
  • The canine sarcoptic mite can also infest cats, pigs, horses, sheep, and various other species. 
  • The human analog of burrowing mite infection, due to a closely related species, is called scabies (the “seven-year itch”).
  • Burrowing mites are in the family Sarcoptidae. 
  • They dig into and through the skin, causing intense itching from an allergic reaction to the mite’s feces, and crusting that can quickly become infected. 
  • Skin damage can occur from the dog’s intense scratching and biting. 
  • Secondary skin infection is also common. 
  • In both animals and humans, immune suppression from starvation or any other disease causes this type of mange to develop into a highly crusted form.

About desert foxes-

  • The white-footed fox (Vulpes vulpes pusilla), also known as the desert fox, is a small, Asiatic subspecies of red fox which occurs throughout most of northwestern Indian subcontinent, Pakistan’s desert districts from Rawalpindi to Rajasthan and Kutch in India, Baluchistan, southern Iran, and Iraq. 
  • It is mostly found on sand-hills or in the broad sandy beds of semi-dry rivers, and only very rarely in fields, and then in the vicinity of sandy tracts.
  • Like the Turkmenian fox, the white-footed fox has a primitive, infantile skull compared to those of its northern cousins.
  • It closely resembles the unrelated Bengal fox in size, but is distinguished by its longer tail and hind feet.
  • IUCN status- Least Concern
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Source: Down to Earth
Tags: NewspaperPrelims

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