 "Mycobacterium abscessus" shows growth at 28 °C and 37 °C after 7 days but not at 43 °C.It may grow on MacConkey agar at 28 °C and even 37 °C.It shows tolerance to saline media (5% NaCl) as well as 500 mg/l hydroxylamine (Ogawa egg medium) and 0.2% picrate (Sauton agar medium).