Plating media for the presumptive identification of the genus Shigella and the species Shigella sonnei and shigella boydii
申请人:——
公开号:US20030049718A1
公开(公告)日:2003-03-13
A solid growth plating medium in which Shigella organisms will grow and form colonies in the medium, and substantially, other microorganisms are inhibited or their colonies are differentiated from Shigella organisms. In one embodiment of the invention, colonies produced by Shigella appear with the color of the plating medium, usually a clear off-white color, that can be readily observed. In another embodiment, the fact that
Shigella boydii
and
Shigella sonnei
produce the enzyme alpha-galactosidase, but most
Shigella dysenteriae
and
Shigella flexneri
strains do not, is utilized with a chromogenic substrate to produce colonies of these microorganisms of a distinguishing color.
一种固体生长电镀培养基,其中的志贺氏杆菌将在培养基中生长并形成菌落,而其他微生物基本上被抑制或其菌落与志贺氏杆菌区分开来。在本发明的一个实施方案中,由志贺氏杆菌产生的菌落与电镀培养基的颜色一起出现,通常是一种清晰的米白色,可以很容易地观察到。在另一个实施方案中,利用男孩志贺氏菌和松内志贺氏菌产生α-半乳糖苷酶,而大多数痢疾志贺氏菌和柔性志贺氏菌菌株不产生这种酶这一事实,用显色底物来产生这些微生物的菌落,使其具有明显的颜色。