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The Canaanite Ivory Comb is a 3,700-year-old artifact discovered in the ruins of Lachish, an ancient Canaanite city-state located in modern-day Israel. Measuring approximately 3.5 by 2.5 centimetres (1.38 by 0.98 in), the comb is made of elephant ivory and contains the earliest known complete sentence written in a phonetic alphabet. [ 1 ]
[35] [36] Although lice cannot fly or jump, they are fast and agile in their native environment (i.e., clinging to hairs near the warmth of the scalp), [30] and will try to avoid the light used during inspection. [37] [38] Louse colonies are also sparse (often fewer than 10 lice), which can contribute to difficulty in finding live specimens. [39]
Louse eggs (also known as nits), are attached near the base of a host hair shaft. [ 11 ] [ 12 ] Eggs are usually laid on the base of the hair, 3–5 mm off the scalp surface. [ 11 ] [ 12 ] In warm climates, and especially the tropics, eggs may be laid 6 inches (15 cm) or more down the hair shaft.
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Ivermectin is an antiparasitic drug. [7] After its discovery in 1975, [8] its first uses were in veterinary medicine to prevent and treat heartworm and acariasis. [9] Approved for human use in 1987, [10] it is used to treat infestations including head lice, scabies, river blindness (onchocerciasis), strongyloidiasis, trichuriasis, ascariasis and lymphatic filariasis.
The rows are oriented to run from near the mouth (the "oral pole") to the opposite end (the "aboral pole"), and are spaced more or less evenly around the body, [18] although spacing patterns vary by species and in most species the comb rows extend only part of the distance from the aboral pole towards the mouth. The "combs" (also called "ctenes ...