Table 2.

Phenotypic characteristics of M. avium subsp. avium

Items	Phenotypic characteristics of M. avium subsp. avium
Colonies on Middlebrook 7H10 agar	Small, round, creamy colored, and sticky colonies
Microscopical examination using Ziehl-Neelsen staining	Non-sporulated, and non-motile acid fast bacilli
Biochemical characteristics	Test	Niacin production test	Nitrate reduction test	Tween-80 hydrolysis assay	Catalase test at 68 °C	Arylsulfatase Test
	Observation	Clear liquid	No color change	No color change	No bubble was produced	Pink color produced within few seconds after adding sodium carbonate
	Results	-ve	-ve	-ve	-ve	+ve