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Scabies (/ ˈ s k eɪ b iː z, ˈ s k eɪ b i iː z /; [10] also sometimes known as the seven-year itch) [1] is a contagious human skin infestation by the tiny (0.2–0.45 mm) mite Sarcoptes scabiei, [1] [3] variety hominis. The word is from Latin: scabere, lit. 'to scratch'. [11] The most common symptoms are severe itchiness and a pimple-like ...
The theory gained much support, as it was known to be more common on light gritty soils. In 1890 however, Roland Thaxter isolated a microbe that could cause common scab lesions, naming it Oospora scabies. [4] Over the years, this species was renamed several times, now being known as Streptomyces scabies. [5]
Streptomyces scabiei (also wrongly named Streptomyces scabies) [1] is a streptomycete bacterium species found in soils around the world. [2] Unlike most of the 500 or so Streptomyces species it is a plant pathogen causing corky lesions to form on tuber and root crops as well as decreasing the growth of seedlings.
The scabies mite Sarcoptes scabiei var. hominis goes through four stages in its lifecycle: egg, larva, nymph, and adult. Upon infesting a human host, the adult female burrows into the stratum corneum (outermost layer of skin), where she deposits two or three eggs per day.
Benzyl benzoate is an effective and inexpensive topical treatment for human scabies. [7] It has vasodilating and spasmolytic effects and is present in many asthma and whooping cough drugs. [ 8 ] It is also used as an excipient in some testosterone -replacement medications (like Nebido ) for treating hypogonadism .
Scabiosa / s k eɪ b i ˈ oʊ s ə / [2] is a genus in the honeysuckle family (Caprifoliaceae) of flowering plants. [3] Many of the species in this genus have common names that include the word scabious, but some plants commonly known as scabious are currently classified in related genera such as Knautia and Succisa; at least some of these were formerly placed in Scabiosa.
In the Second World War, he studied the control of scabies mite, an infection that was keeping thousands of soldiers in hospital. Mellanby meticulously counted all female mites that had burrowed into 886 soldiers, and determined that the average scabies sufferer harbors only 11.3 mites.
Notoedric mange, also referred to as Feline scabies, is a highly contagious skin infestation caused by an ectoparasitic and skin burrowing mite Notoedres cati (Acarina, Sarcoptidae). N. cati is primarily a parasite of felids , but it can also infest rodents , lagomorphs , and occasionally also dogs and foxes.