tache noire

tache

 [tahsh] (Fr.)

a spot or blemish.

tache blanche (“white spot”), a white spot on the liver in certain infectious diseases.

t's bleuâtres (“bluish spots”), maculae caeruleae.

tache cérébrale (“cerebral spot”), a congested streak produced by drawing the nail across the skin; a concomitant of various nervous or cerebral diseases.

tache motrice (“motor spot”), a motor nerve ending in which the nerve fibril passes to a muscle cell, where it ends in a slight enlargement.

tache noire (“black spot”), an ulcer covered with a black crust, a characteristic local reaction at the presumed site of the infective bite in certain tickborne rickettsioses.

tache noire

[täsh nô·är′]

Etymology: Fr, black spot

a local buttonlike ulcer with a black center that marks the point of infection in certain rickettsial diseases such as African tick typhus and scrub typhus.

A condition affecting young adults, and seen on the thenar eminence of those participating in various sports—e.g., climbing, gymnastics, golfing, tennis, weight lifting, and others; BP is caused by lateral shearing stress of epidermis against the rete pegs of the papillary dermis, resulting in rupture of capillaries, and intraepidermal and intracorneal hemorrhage which translate into multiple symmetrical black spots

tache noire

(tahsh nwahr)

Characteristic lesion (the term is French for "black spot,") that can form at the site of an arthropod bite transmitting either Rickettsia conorii or Orientia tsutsugamushi to a human host; primary lesion of boutonneuse fever.

tache noire

The initial sign of the tick-borne TYPHUS fevers of Africa-a painless, raised red area with a black centre of dead (necrotic) tissue, that appears at the site of the tick bite.