David Gruby (20 August 1810 – 14 November 1898) was a Hungarian physician born in the village of Kis-Kér (now Bačko Dobro Polje, Serbia) to a Jewish farmer.

[2] In 1841 he described the fungus associated with favus, a discovery that was independent of Johann Lukas Schönlein's (1793–1864) findings.

In 1842 he described a microscopic cryptogam (Trichophyton ectothrix) that is associated with a dermatological disease known as sycosis barbae.

Gruby also discovered a parasite in the blood of frogs he called Trypanosoma sanguinis.

During the early years of anaesthesia, he performed important experiments with chloroform and ether on animals.