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| − | {{toplink
| + | #REDIRECT[[:Category:Integumentary System - Parasitic Infections]] |
| − | |backcolour = FFCCCC
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| − | |linkpage =Integumentary System - Pathology
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| − | |linktext =Integumentary System
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| − | |maplink = Integumentary System (Content Map) - Pathology
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| − | |pagetype =Pathology
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| − | |sublink1 = Skin Infectious - Pathology
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| − | |subtext1 = SKIN INFECTIOUS
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| − | }}
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| − | <br>
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| − | ==[[Flea Dermatosis]]==
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| − | ==[[Fly Dermatosis]]==
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| − | ===[[Myiasis]]===
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| − | ==Helminths==
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| − | ===[[Habronemiasis, Cutaneous]] ===
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| − | ===[[Hookworm Dermatosis]]===
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| − | ===[[Onchocerciasis]]===
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| − | ===[[Stephanofilariasis]]===
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| − | ==Lice==
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| − | [[Pediculosis]]
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| − | ==Mites==
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| − | ===[[Cheyletiellosis]]===
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| − | ===[[Chorioptic Mange]]===
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| − | ===[[Demodicosis]]===
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| − | ===[[Feline Scabies|Notoedric mites]]===
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| − | ===Otodectic mites===
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| − | *Caused by [[Otodectes cynotis|''Otodectes cynotis'']]
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| − | *In external ear canals of carnivores, occasionally elsewhere
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| − | ===Psoroptic mites===
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| − | *Occurs in cattle, sheep, horses, goats, rabbits and other animals
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| − | *Host-specific
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| − | *[[Psoroptes cuniculi|''Psoroptes cuniculi'']] in ear canals of rabbits, horses, goats and sheep
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| − | *[[Psoroptes|''P.equi'']] at base of mane, tail and forelock in horses
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| − | *[[Psoroptes ovis|''P.ovis'']] in sheep ('''sheep scab''')and cattle
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| − | **Thickened skin and dry scales and crusts
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| − | **Starts at withers and spreads due to self trauma
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| − | **Microscopically:
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| − | ***Spongiotic, hyperplastic or exudative superficial perivascular dermatitis
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| − | ***Eosinophils
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| − | ===Scabies===
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| − | *Caused by [[Sarcoptes|''Sarcoptes scabiei'']]
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| − | *Highly contagious
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| − | *Mainly in pigs, dogs, also horses, cattle, sheep, goats and cats
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| − | *Intense pruritus due hypersensitivity to mites borrowing through stratum corneum
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| − | *Usually starts with external pinnae -> head -> neck -> generalised
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| − | *Grossly:
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| − | **Erythematous [[Skin Glossary - Pathology|macules, papules, crusts]]
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| − | **If chronic -> [[Skin Glossary - Pathology|lichenified]], hairless
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| − | *Microscopically:
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| − | **Hyperplastic, spongiotic, superficial perivascular dermatitis
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| − | **Crusting, eosinophil infiltration
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| − | **Mites are not commonly seen, but eggs and feces may be found in stratumn corneum
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| − | ===Trombiculidiasis===
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| − | *Harvest mite infestation (chiggers) - [[Trombicula autumnalis|''Trombicula'' sp.]]
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| − | *Form tunnels in epidermis by injecting saliva - eat digested tissue fluid
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| − | *Intense pruritus
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| − | *Grossly:
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| − | **Small, red [[Skin Glossary - Pathology|papules or crusts]]
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| − | **Orange to red larvae
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| − | **On skin close to plants or the ground
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| − | *Microscopically:
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| − | **Hyperplastic, superficial perivascular dermatitis
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| − | **[[Eosinophils|Eosinophils]], [[Mast Cells|mast cells]]
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| − | **Intraepidermal mites
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| − | ==Protozoa==
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| − | *Cutaneous infection may become a part of systemic infection
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| − | *Mostly caused by [[Protozoa|''Leishmania'']]
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| − | *Transmitted by [[Insecta|sandflies]]
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| − | *Occurs in dogs, cats and rodents (also humans)
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| − | *Grossly in dog:
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| − | **Generalised alopecia
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| − | **Silvery white scales
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| − | **Nodules and ulcers if more severe
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| − | **Mainly on muzzle, ears and eyes where flies feed
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| − | *Microscopically:
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| − | **[[Skin Glossary - Pathology|Hyperkeratosis, parakeratosis, crusts]]
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| − | **Granulomatous nodules in dermis
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| − | **Macrophages, some lymphocytes and plasma cells - periadnexal pattern, may affect sebaceous glands
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| − | **Organisms may be found extra or intracellularly
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| − | ==Ticks==
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| − | *Local reaction depends on host hypersensitivity and [[Ticks|tick's]] secretions
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| − | *Grossly:
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| − | **Focal erosions, erythema, crusted ulcers, sometimes alopecia and nodules
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| − | *Microscopically:
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| − | **Epidermal and dermal necrosis
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| − | **Perivascular of diffuse inflammation and necrotic margins
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| − | **Eosinophils, macrophages and lymphocytes in exudate
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| − | **May form granulomas containing collagenous fibres and lymphoid follicles within dermis
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