<unk> , more commonly known as LJ<unk> , is a growth<unk>  specially used for culture of Mycobacterium species, notably Mycobacterium tuberculosis. When grown on LJ<unk> , M. tuberculosis appears as brown, granular colonies (sometimes called "buff, rough and tough"). The<unk>  must be incubated for a significant length of time, usually four weeks, due to the slow doubling time of M. tuberculosis (15–20 hours) compared with other bacteria. The<unk>  is named after the Austrian pathologist Ernst<unk>  (1878–1950) and the Danish medical doctor Kai Adolf<unk>  (16.7.1894-2.5.1971).
Löwenstein–Jensen medium
Hektoen enteric agar
Blackett's Aerophor
Hyoid suspension
Leishman stain
Phosphotungstic acid-haematoxylin stain
Giemsa stain
Speculum 