Results of Diagnostic
Assays Performed on Isolate

 

  ASSAY                 RESULT            NOTES

 
 
 
 

Growth on Tomato Juice Agar (1)

TJA1
Figure 2.  Colonial growth on tomato juice agar (1) 
                incubated at 37 oC for 48 hours.
Colony Morphology:

Shape:
circular
Margin:
entire
Elevation:
convex
Size:
pinpoint
Texture:
smooth
Appearance:
dull
Pigmentation:
nonpigmented
Optical Property:
opaque


 
 
 
 

Growth on Tomato Juice Agar (2)

TJA2
Figure 3.  Colonial growth on tomato juice agar (2) 
                incubated at 37 oC for 48 hours.
Colony Morphology:

Shape:
circular
Margin:
entire
Elevation:
convex
Size:
pinpoint
Texture:
smooth
Appearance:
dull
Pigmentation:
nonpigmented
Optical Property:
opaque


 
 
 

Growth on T-Soy Agar

TSAGrowth
Figure 4.  Colonial growth on T-soy incubated at 
                37o C for 48 hours.
Colony Morphology:

Shape:
circular
Margin:
entire
Elevation:
convex
Size:
pinpoint
Texture:
smooth
Appearance:
dull
Pigmentation:
nonpigmented
Optical Property:
opaque


 
 
 

Gram Stain

Gram Stain
Figure 5.  Gram stain of isolate colony from T-Soy 
                agar. (1000x magnification)

 
 
 
 

Gram positive cocci observed


 
 
 

Endospore Stain

Estain
Figure 6.  Endospore stain of isolate colony from 
                T-soy agar. (1000x magnification)

 
 
 
 

No sporulation observed. Cells stained with safranin.


 
 
 

Capsule Stain

Cstain
Figure 7.  Capsule stain of isolate colony from T-soy 
                agar. (1000x magnification) 

 
 
 
 

No capsules observed. 


 
 
 

MacConkey's Agar Growth

MacAgar
Figure 8.  Growth on MacConkey's agar incubated 
                at 37 o C for 48 hours.

 
 
 
 

No growth observed. 


 
 
 
 

Sheep's Blood Agar Growth

Blood
Figure 9.  Colonial growth on sheep's blood agar 
                incubated at 37 oC for 48 hours. 

 
 
 
 

Growth observed, gamma-hemolysis pattern.


 
 
 

Anaerobic Chamber Growth

Anaerobe
Figure 10.  Colonial growth on T-soy agar incubated 
                  at 37 o C for 48 hours in an anaerobic                           chamber.
Colony Morphology:

Shape:
circular
Margin:
entire
Elevation:
convex
Size:
pinpoint
Texture:
smooth
Appearance:
dull
Pigmentation:
nonpigmented
Optical Property:
opaque

Oxidase Assay No color change on swab. Oxidase negative.
Catalase Assay Slight bubble formation. Catalase negative.

 
 
 
 
 
 
 
 
 
 
 
 

Carbohydrate Utilization Tests

Glucose
Figure 11.  Innoculated glucose tube incubated at 
                 37 o C for 48 hours.
 
Lactose
Figure 12.  Inoculated lactose tubes incubated at 
                 37 o C for 48 hours. Environmental isolate 
                 on left . E. Coli control on right.

 
 
 
 
 

Color change and bubble in Durham tube observed (Figure 11).
 
 
 
 
 
 
 
 
 

No color change or bubbles observed in lactose tube innoculated with environmental isolate. Color change and bubble formation in E. Coli control tube. (Figure 12) 


 
 
 
 

Motility Stab

Motility
Figure 13.  Inoculated motility stab agar incubated 
                 at 37 o C for 48 hours. 

 
 
 
 

Growth confined to stab line. 

Growth in 4o No growth observed. No growth observed.
Growth in 55oC No growth observed. No growth observed.

 
 
 

Growth in T-Soy Broth

Broth
Figure 14.  Simple stain of enviromental isolate 
                  extracted from T-soy broth. (1000x                               magnification)

 
 
 
 

Cellular Arrangement:
Long strands/chains of cocci

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