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11 Cards in this Set
- Front
- Back
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Margin
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curled (concentric even or irregular rings), entire (smooth, even), filamentous
(hairy, thread-like appearance), lobate (lobes with deeper indentations than undulate), undulate (regular wave-like pattern), serrate (saw toothed pattern) |
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Surface
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concentric (ring-like pattern), rugose (wrinkled), contoured (smooth fold-like
pattern), radiate (spoke-like pattern), smooth |
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Whole
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circular (round), granular, punctiform (very minute, pin-point),
filamentous (thread-like appearance), irregular (varying, non-uniform shape), rhizoid (root-like appearance) |
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Elevation
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convex (curving outward), pulvinate (higher dome than convex), umbonate
(rounded double terraced surface), flat (level or slightly above agar), raised (projects above agar, with flat or even surface), subsurface (pour plates only, these are spindleshaped colonies) |
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chromogenesis
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color
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Broth
Surface |
DO NOT MIX
no growth (Ø), ring, membrane (thin film), pellicle (thick film), flocculent (flakes), granular |
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Broth
Middle |
DO NOT MIX
no growth (Ø), fine turbidity, granular, flocculent |
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Broth
Bottom |
MIX
no growth (Ø), fine turbidity, granular, flocculent, viscid (stringy or ropy) |
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Slant
Form |
arborescent (tree-like or branched), beaded (separate colonies), echinulate
(margins are tooth-like or serrated, usually pointed at top), filiform (even or uniform growth at point of inoculation), rhizoid (root-like), spreading (highly motile forms take over slant) |
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Slant
Density |
opaque (thick growth, no light will get through), translucent (moderate growth,
some light will get through), transparent (thin growth, light penetrates easily) |
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How do you test Gelatin Deeps in Lab?
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After placing the tube in an ice bath for 5 minutes, look to see if there is liquefaction.
The result sheet will have a “pos” for liquefaction or a “neg” for no liquefaction. Do not turn the tube upside down. Any liquid in the tube should be interpreted as a positive. Liquefaction means that the organism was capable of protein (gelatin) hydrolysis. |
