Staining characters and cultural characters

STAINING CHARACTERS AND CULTURAL CHARACTERS

Staining characters

  • Gram stained smears from smooth colonies reveal slender Gram-positive rods.
  • Smears from rough colonies disclose highly pleomorphic and filamentous forms.

Cultural characters

  • It grows readily on media enriched with serum or blood. 5 – 10% CO2 stimulates growth.
  • It produces a hemolysis (Greenish) on blood agar.
  • It produces bottlebrush type of growth in gelatin stab incubated at room temperature.

Biochemical properties of E.rhusiopathiae

Catalase
-
Oxidase
-
H2S
+
Indole
-
Aesculin
-
Coagulase
+
Glucose
+
Fructose
+
Lactose
+

Laboratory Indications of E.rhusiopathiae

Catalase Non- motile
-
H2S
+

 
Last modified: Monday, 4 June 2012, 6:16 AM