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21 Cards in this Set
- Front
- Back
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What are examples of M/O that are Aerobic?
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Pseudomonas
molds |
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What are examples of M/O that are Microaerophillic
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campylobacter
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What are examples of M/O that are Facultative Anaerobes?
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Saccharomyces
escherichia listeria |
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What does Aciduric mean? Give examples of M/Os.
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M/O that Survive low pH
-Many are used in production of fermented foods -lactobacillus, pediococcus, enterococcus, strephtococcus |
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What does Thermoduric mean?
Give examples |
M/O that survive pasteurization treatments
Some: Bacillus, Clostridium-both produce spore -spoilage organisms (especially is thermoduric psychrotrophs |
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What are Halotolerant M/O?
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Survive high concentrations of salt
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What are osmophillic M/O?
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grow in relatively high osmotic environments
-many yeasts and molds -causes issues in candies |
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Describe a Gram Positive cell
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-Large amounts of peptidoglycan
-techoic acid -no LPS layer -cocci shape |
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Describe a Gram Negative cell
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-small amt of peptidoglycan
-no techoic acid -outer lipopolysaccharide layer |
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What time of stain will a Gram Positive cocci produce?
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purple
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what type of stain will a gram negative rod produce on a gram stain?
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clear or very faint
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What is techoic acid?
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an acidic polysaccharide attached to the cell wall/membrane or capsular polymer
-contains glycerophosphate or ribitol -negatively charged |
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What is virulence?
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the tenacity of the disease
-more virulent=nastier the disease symptoms |
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What is an opportunistic pathogen?
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requires a compromised host
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what is pathogenic?
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disease causing
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What is a food borne infection?
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-live org. multiply causing illness
-takes time > 13 hours -fever are often the symptoms |
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what is a foodborne intoxication?
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-a preformed toxin (poison) is found in food before consumption
-NO fever -quick acting (30min-13 hrs) |
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What is a food borne toxi-coinfection?
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-organisms produces toxin as it is growing in the person
-disease state is caused by the high numbers and the toxin |
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What are enterotoxins?
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toxins that react in the gut
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what are cytotoxins?
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toxin which kills the cells
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what are mycotoxins?
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toxins produced by molds
-patulin -aflatoxin |
