“…3 Our patient is the sixth, and the youngest, case reported in an infant. [4][5][6][7][8] Black hairy tongue occurs most often in those who are heavy tobacco smokers, consumers of betel nut, dark tea, or natural licorice candy, and in those undergoing drug therapy with bismuth-containing antidiarrhea medications, linezolid, or tetracycline antibiotics. [9][10][11] Five reported cases of linezolid-induced black hairy tongue were identified in a MEDLINE search from January 2000 to June 2012.…”