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28 Cards in this Set
- Front
- Back
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Blood agar plate that has alpha helmolysis has an appearance of a _____ zone.
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green, unclear |
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What tests for Group b streptococci? |
CAMP test |
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Blood agar plate with beta hemolysis exhibits _____ zones |
clear |
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Primary enzyme in tears is known as _________ |
lysozymes |
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A positive urease test result is ____ in color and is due to ______________________ |
pink, ammonia production |
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Type of food treatment that is high energy e- is known as ___________ |
irradiation |
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What part of the bacterial cell does irradiation effect? |
DNA |
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Reduction of nitrogen gas to ammonia by bacteria is called ___________ |
nitrogen fixation |
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Release of ammonia from organic compounds by deamination is called? |
ammonification |
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Process which carbon nitrogen phosphorous and sulfur are released from soil organic mineral so they can be used in metabolism is known as _______________ |
mineralization |
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___________ is an antibody/antigen reaction that produces clumping when organism and antibody are mixed. |
Agglutination |
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The process of_________ is where bacteria reduce nitrates to nitrites and eventually to nitrogen gas and/or ammonia. |
dentrification |
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When evaluating a food product it is important to determine the _____________, but just as important to also know the ______ of bacteria. |
bacterial numbers, type/kind |
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Plant structure formed by interaction of plant root hairs and bacteria are called ________ |
root nodules |
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List all four Koch’s postulates: |
1. organism present in all diseased hosts, absent in health 2. Isolate organism from host and grow in pure culture 3. Introduce organism to new host, get the same disease 4. Isolate again the same disease from the new host |
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3 phases of MPN are: |
Presumptive Confirmed Complete |
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6 characteristics of coliforms: |
1. All rods 2. All gram - 3. Produce gas 4. Utilize lactose 5. Facultative anaerobe 6. Non-endospore forming |
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After adding reagents A and B to inoculated nitrate broth it turns dark red this means? |
Nitrate reduced to nitrite |
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If there was no color change after the above was done, what is the next step? |
add zinc |
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What is the definition of indicator organism? |
if the indicator organism is present/absent then it shows the probability that the pathogen is also present/absent |
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If you have a selective and differential media what does this mean? ___________ |
It selects for certain types but different types appear physically different |
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Most genes for antibiotic resistance are located in the _____ |
plasmid |
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A positive bile esculin test will appear ____ |
black/dark brown |
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The prefix that describes cocci that are grouped together in irregular, grape like clusters is ____ |
staph |
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When gram stained, a gram (+) organism appears ____ |
purple |
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1.0ml of stock culture is transferred to a tube with 9.0ml of saline and then .1ml is transferred from this tube to a tube with 9.9ml. What will the dilution on the agar plate of 0.1ml is plated from the final dilution tube? ____ |
10^-4 |
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The prefix used to describe bacteria arranged in chains or strings is _____ |
strepto |
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Comma shaped bacteria are called _____ |
vibrio |
