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An eschar (/ ˈ ɛ s k ɑːr /; Greek: ἐσχάρᾱ, romanized: eskhara; Latin: eschara) is a slough [1] or piece of dead tissue that is cast off from the surface of the skin, particularly after a burn injury, but also seen in gangrene, ulcer, fungal infections, necrotizing spider bite wounds, tick bites associated with spotted fevers and exposure to cutaneous anthrax.
The most obvious symptom of bacterial leaf spots are the blackening of the spots after infection. Eventually older lesions dry out and become papery in texture. [ 12 ] Bacterial spots can also produce white, yellow, light cream or silver bacterial exudate depending on the type of bacteria, which may ooze from splitting lesions and/or from the ...
Common scab is a plant disease of root and tuber crops caused by a small number of Streptomyces species, specifically S. scabies, S. acidiscabies, S. turgidiscabies and others. Common scab mainly affects potato ( Solanum tuberosum ), but can also cause disease on radish ( Raphanus sativus ), parsnip ( Pastinaca sativa ), beet ( Beta vulgaris ...
Debridement is the medical removal of dead, damaged, or infected tissue to improve the healing potential of the remaining healthy tissue. [2] [3] Removal may be surgical, mechanical, chemical, autolytic (self-digestion), or by maggot therapy.
A potato infected by common scab. Streptomyces scabiei is a streptomycete bacteria which means it forms a mycelium made of hyphae, a growth form more usually associated with fungi. The hyphae of Streptomyces, are much smaller than those of fungi (0.5–2.0 μm) and form a heavily branched mycelium.
Pear scab, a pear fungal disease caused by Venturia pirina or Fusicladium pyrorum; Poinsettia scab, a spot anthracnose disease caused by Sphaceloma poinsettiae; Powdery scab, a disease of the skin of potatoes caused by the protozoa Spongospora subterranea; Sheep scab, a skin disease of sheep caused by the mite Psoroptes ovis
The mites burrow into the skin to live and deposit eggs. [3] The symptoms of scabies are due to an allergic reaction to the mites. [2] Often, only between 10 and 15 mites are involved in an infection. [2] Scabies most often spreads during a relatively long period of direct skin contact with an infected person (at least 10 minutes) such as that ...
First attested in English in the late 14th century, the word scar derives from a conflation of Old French escharre, from Late Latin eschara, [64] which is the Latinisation of the Greek ἐσχάρα (eskhara), meaning "hearth, fireplace", but in medicine "scab, eschar on a wound caused by burning or otherwise", [65] [66] and Middle English skar ...