Unit 4: Chapter 40 Flashcards
Microbial growth is controlled by
intristic factors
intristic factors
factors related to food itself which is hard to manipulate
Carbohydrate rich food show spoilage by
fungi
____ produce enzymes to dehydrate carbohydrates in skin and then for ____ to colonize food
molds, bacteria
Molds in carbohydrate rich food
produce enzymes to degrade carbohydrates in skin
Bacteria in carbohydrate rich food
Used to colonize food
Food contains ___ and _____ that support bacterial growth
proteins, fats
Putrefaction
anaerobic breakdown of proteins by bacteria which yields bad smell
Unpasterurized milk spoilage
Acid production followed by growth of acid tolerant organisms
What is responsible for making milk clear?
Proteins and fat which coagulate
Low pH favors
yeast (unicellular fungi)
High pH favors
bacteria
Griding of food impact
increases surface area and distribute microbes to help with growth
E. coli: 0157: H7
pathogenic E. Coli
comes from undercooked hamburger patty and beef
has toxin shiga LIKE toxin!
E. coli: 0157: H7 has what type of toxin
shiga like toxin
Zoonotic Diseases
Transmission from animal to human
Food intoxication
- no organism ingested
- poison/ toxin entry from food
- produces symptoms shortly
Ex. S Aureus
S. Aureus
pathogenic
Entertoxin
Superantigen (exotoxin)
Food Borne infection
ingestion of pathogen which makes symtpoms take longer
Ex. Listeriosis
Fungus dervied toxins include
aflatoxins and fumosins
Aflatoxins
cacrinogens produced in fungus contaminated grains and nut productions
Aflatoxins are produced from what
aspergillus has very flat ring structure which causes frameshift mutation
Fumonisins
produced in fungus infected corn
