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HSP 218 > Classification of Food Contamination/ Criteria for Bacterial Growth > Flashcards

Classification of Food Contamination/ Criteria for Bacterial Growth Flashcards

1
Q

What are the 3 categories of contaminants that cause FBI?

A

physical
chemical
biological

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2
Q

What does FBI mean?

A

Food borne illness

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3
Q

What is a physical contaminant? Ex?

A

something you can spit out

Ex: metal shaving, bone, glass, pebble, twist tie, toothpick

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4
Q

What is a chemical contaminant? Ex?

A

in solutions

Ex: pesticide, cleaner, toxic metal leaching into food

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5
Q

What is a biological contaminant? Ex?

A

microorganisms and their waste

Ex: animal waste, fish toxins, parasites, mushroom toxins, plant toxins

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6
Q

T/F: Microorganisms can be beneficial and are in some of our food/ drinks and meds.

A

T

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7
Q

What percent of all FBI’s are caused by microorganisms?

A

90

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8
Q

T/F: Spoilage will always be detectable.

A

F: can be undectectable

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9
Q

What is spoilage? Ex?

A

breakdown of food

moldy bread

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10
Q

What are some ways to detect spoilage?

A

taste change
outward appearance
aroma

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11
Q

What are pathogens and are they hazardous?

A

health hazards

NO outward change

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12
Q

What category do most microorganisms fit in?

A

Inert

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13
Q

What is an Inert microorganism?

A

either they don’t effect us or we haven’t made connection of their affect

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14
Q

Is inert considered hazardous?

A

no, not considered bad/good

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15
Q

T/F: Inert microorganisms can be inert and then later cause diesease

A

T

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16
Q

What are factors that determine how we are affected? (6)

A 
who eats it (old, baby, preg, sick)
number or organisms
competition w/ other organisms
type of food
how food is prepared/ served
stored w/ or w/o oxygen
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17
Q

What is a vegetative cell capable of?

A

reproducing

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18
Q

How does a vegetative cell reproduce?

A

splits into 2 daughter cells

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19
Q

How many bacterial cells are there if they have 12 hrs to reproduce?

A

17 mil

20
Q

What is an endospore?

A

dormant “seed like” part of bacteria

21
Q

Is an endospore capable of reproducing?

A

no, but they can survive adverse conditions

22
Q

What does FAT TOM stand for?

A

food time
acidity oxygen
temp mositure

23
Q

What does TCS stand for?

A

time/ temp control for safe food

24
Q

What do TCS foods contain?

A

moisture, protein, neutral/ slightly acidic

25
Q

On a ph scale what number is basic? acidic?

A

14

0

26
Q

How does acidity effect bacteria?

A

bacterial growth

27
Q

What is the optimum range for food on the ph scale?

A

4.6- 9

28
Q

What is the temp range for thermophile? mesophiles? psychrophiles? (F)

A

110-130
60-110
20- 40

29
Q

What is the temp danger zone?

A

41- 135

30
Q

What happens to a heat liable toxin?

A

destroyed by proper heating

31
Q

What happens to a heat stable toxin?

A

not destroyed by normal cooking temps

32
Q

What happens to proteins between the temps of 136- 138?

A

they denature

33
Q

What happens during the lag phase?

A

the food service manager has the most control over growth conditions

34
Q

What happens during the log phase?

A

bacteria reproduce by splitting in the correct conditions. food will quickly become unsafe

35
Q

What happens during the stationary phase?

A

bac grow until conditions are unfavorable, eventually growing and dying at the same rate

36
Q

What happens during the death/ decline phase?

A

the dying bac out number the growing bac population

37
Q

What is the diff btw aerobic/ anaerobic?

A

w/ oxygen

w/o oxygen

38
Q

Is the center of a large pot aerobic or anaerobic?

A

anaerobic

39
Q

What does Aw stand for?

A

available water

40
Q

T/F: Bacteria can grow in pure water

A

F: it cannot

41
Q

What causes an infection? How long is the time delay? What symptom always happens?

A

living organisms
1- 50 days
fever

42
Q

What causes an intoxication? When can you feel intoxicated? What are some symptoms?

A

microorganisms
immediately
fatigue, dehydration, dizziness

43
Q

T/F: A fever will appear if you are intoxicated

A

F: there will not be a fever

44
Q

How does a toxin- medicated infection spread?

A

the toxin is produced inside your intestine

45
Q

How are contaminations spread?

A

person- person
body fluids
cross contamination

46
Q

What treats viruses?

A

nothing

HSP 218 (8 decks)

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