Term
| Bacteria exist in natural environments as MIXED CULTURES? |
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Definition
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Term
| Who is the father of medical microbiology? |
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Definition
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Term
| What does a pure culture contain? |
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Definition
| It contains only a single kind of an organism. |
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Term
| What does a mixed culture contain? |
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Definition
| More than one kind of organism. |
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Term
| What does a contaminated culture contain? |
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Definition
| The desired organism + unwanted organisms |
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Term
| What are 2 procedures for obtaining pure cultures? |
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Definition
1. streak plate
2. pour plate |
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Term
| What is the advantage of pour-plate method? |
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Definition
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Term
| What is the disadvantage of the pour-plate method? |
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Definition
| Requires more media, tubes and plates. |
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Term
| Why would a culture of S. marcescens not be red if inoculated at a temperature higher than 25 C? |
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Definition
| Because higher temperatures inhibit the formation of the organism's red pigment. |
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Term
| What kind of gram is S. marcescens? Shape? |
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Definition
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Term
| What kind of gram is M. luteus? Shape? |
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Definition
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Term
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Definition
| Cells that result from one parents cell. |
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Term
| Why is dilution a necessary prt of pure culture preparation? |
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Definition
| For getting isolated colonies. |
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Term
| Before inoculating and pouring molten nutrient agar into a plate, why must the agar first be cooled to 50 C? |
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Definition
| In order to avoid condensation of moisture on the cover. |
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