David Gruby

David Gruby (August 20, 1810 – November 14, 1898) was a Hungarian physician born in the village of Kis-Kér (now Bačko Dobro Polje, Serbia). He received his doctorate in Vienna and performed scientific research in Paris.

Gruby is remembered as a pioneer in the fields of microbiology and medical mycology. Most of his important work was done during the 1840s. In 1841 he described the fungus associated with favus, a discovery that was independent of Johann Lukas Schönlein's (1793–1864) findings. Later, the fungal parasite was called Achorion schoenleinii in Schönlein's honor.

In 1842 he described a microscopic cryptogam (Trichophyton ectothrix) that is associated with a dermatological disease known as sycosis barbae. Gruby also discovered Candida (Monilia) albicans, the cause of candidiasis, and in 1843 he described a fungus (Microsporum audouinii) that is the cause of a type of ringworm. This fungus was named after naturalist Jean Victor Audouin (1797–1842).

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.

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