Scab may refer to:
Biology Scab, a hard coating on the skin formed during the wound healing reconstruction phase scAb, single-chain antibody fragment
Infections and infestations Apple scab, an apple tree (genus Malus) fungal disease caused by Venturia inaequalis Black scab, a potato fungal disease caused by Synchytrium endobioticum Common scab, a plant bacterial disease caused by Streptomyces species Fusarium head blight, a fungal disease of plants, e.g., grain crops (especially wheat and oats), golf course grass, caused by the several species of Fusarium Pear scab, a pear fungal disease caused by Venturia pirina or Fusicladium pyrorum Poinsettia scab, a spot anthracnose disease caused by Sphaceloma poinsettiae Powdery scab, a disease of the skin of potatoes caused by the protozoa Spongospora subterranea Sheep scab, a skin disease of sheep caused by the mite Psoroptes ovis
Labor Scab, a pejorative term for a strikebreaker, a person who works despite strike action or against the will of other employees
Other uses South Coast Air Basin, in California, US Johnny Dole & The Scabs, one of the first punk rock bands in Australia "Scab" (Juliet Bravo), a 1985 television episode
See also Scabs (disambiguation) Channeled Scablands, an eroded landscape formed by Missoula Floods in the U.S. state of Washington Scabies, a skin disease caused by the mite Sarcoptes scabiei U.S. Wheat and Barley Scab Initiative, a joint government and academic program to develop control measures to minimize the threat of Fusarium head blight (scab) in the United States