. The elements of pathological histology with special reference to practical methods . ars two pairs of feet set with bristles on theanterior, and the same on the posterior, half of the ventral surface,of which the anterior pairs, and in the male the posterior also, endin pedunculated prehensile discs, whilst the rest run out into longbristles. The dorsum bears tooth-shaped processes. The animalexcavates tunnels in the epidermis from 1 to 3 cm. long, in whichthe female lays her eggs. The young mites formed from the latterdevelop at once into sexually mature animals, penetrating still moreinto
. The elements of pathological histology with special reference to practical methods . ars two pairs of feet set with bristles on theanterior, and the same on the posterior, half of the ventral surface,of which the anterior pairs, and in the male the posterior also, endin pedunculated prehensile discs, whilst the rest run out into longbristles. The dorsum bears tooth-shaped processes. The animalexcavates tunnels in the epidermis from 1 to 3 cm. long, in whichthe female lays her eggs. The young mites formed from the latterdevelop at once into sexually mature animals, penetrating still moreinto the epidermis. The irritation set up thereby, in conjunctionwith the scratching, causes an inflammation of the skin. 1 When more rapid sedimentation is desired, Stenbecks centrifuge can beused with advantage. 182 THE ANIMAL PARASITES (b) Acaints [Bemodex] follicidorum hominis, which is often met within the sebaceous and hair follicles, is about 0*3 mm. long, and hasat the cephalic end a proboscis with two antennae, and on theanterior part of the body four pairs of short thick Fig. 93.—Female Itch-mite, seen from the dorsal aspect (from HebrasAtlas der Hautkrankheiten). x 200. It should further be mentioned here, by way of appendix, that thela7vm of various species of flies make their way into the stomachand intestine along w4th food eaten uncooked, such as meat, cream,or cheese, and may even develop further there, and hence be foundalso in vomited matters or in the stools. Methods.—The itch-mite is found if the point of a knife or cataract needle bethrust into the epidermis near the yellowish-white dot at the end of the charac-teristic burrow, and the contents of the latter brought out. The animal (thefemale) appears to the naked eye as a minute yellowish-white body, which is quiteperceptible, but which can then be further inspected under the microscope, usinga low power. If it is desired to examine the actual burrow, it is cut out withscissors and squeezed between t
Size: 1360px × 1838px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1890, booksubjectpatholo, bookyear1895
