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Food microbiology

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Total cards: 23•Content version: v4•Public deck•Updated: 8/1/2026

Card preview (23)

#1
Front (Question)

Food spoilage microorganisms from soil

Back (Answer)

spore forming species of pathogens: clostridium bacillus

#2
Front (Question)

Shellfish bacteria

Back (Answer)

bacterial toxins from photosynthetic cyanobacteria

#3
Front (Question)

Enteric bacteria

Back (Answer)

e.g e coli - farm and town sewage - Detection of E-coli in sea/river water is indicator of sewage contamination -Lobster, shellfish/ muscle from costal waters pose some risk of food safety

#4
Front (Question)

Campylobacter sp

Back (Answer)

campylobacteriosis bloody diarrhoea

#5
Front (Question)

Salmonella sp

Back (Answer)

Salmonellosis bloody diarrhoea

#6
Front (Question)

E. coli O157:H7

Back (Answer)

Haemolytic Uremic Syndrome diarrhoea, kidney failure, death

#7
Front (Question)

Y.entericolitica

Back (Answer)

Yersiniosis diarrhoea

#8
Front (Question)

L. monocytogenes

Back (Answer)

Listeriosis meningitis, blood infections

#9
Front (Question)

Mycobacterium tuberculosis

Back (Answer)

tuberculosis pneumonia

#10
Front (Question)

brucella sp

Back (Answer)

brucellosis blood infections, heart infections

#11
Front (Question)

cryptosporidium parvum

Back (Answer)

cryptosporidiosis diarrhoea

#12
Front (Question)

s. aureus

Back (Answer)

staphylococcal enterotoxin poisoning vomiting

#13
Front (Question)

coxiella burnetti

Back (Answer)

Q Fever high fever, headache, muscle aches, can infect liver and/or heart

#14
Front (Question)

What temperature do mesophiles operate at

Back (Answer)

15-40 degrees

#15
Front (Question)

what temp do thermophiles act at

Back (Answer)

45-80 extreme thermophiles - <122°C (Topt = 80°C)

#16
Front (Question)

In what condition do halotolerance at at

Back (Answer)

high salt

#17
Front (Question)

at what temp do psychrophiles act at

Back (Answer)

PSYCHROPHILES 0-15°C (Topt = 5°C) Cold-tolerant – can be found in refrigerators

#18
Front (Question)

in what conditions are acidophilics found

Back (Answer)

high acidity

#19
Front (Question)

Bacterial growth is monitored by:

Back (Answer)

• Turbidity • Plate Count • Newer tech, e.g ATP-bioluminescence

#20
Front (Question)

5 phases of bacterial growth

Back (Answer)

-Lag phase -Acceleration phases -Exponential growth phase – maximum rate of cell -division coincides -Deceleration -Stationary phases

#21
Front (Question)

Intrinsic factors affecting bacterial growth

Back (Answer)

pH Water availability Redox potential Physical properties Antimicrobial substances

#22
Front (Question)

Extrinsic factors causing bacterial growth

Back (Answer)

Temperature Relative humidity (RH) Water activity (Aw) Atmosphere (gas)

#23
Front (Question)

Hurdle Concept of preservation

Back (Answer)

… or hurdle technology (Leistner, 2000) Rationale: every food product has factors that (in some way-intrinsic/extrinsic) oppose MO growth Underpinned by homeostasis – the ability of MO’s to adapt to stresses for survival ‘hurdles’ are directly linked to factors affecting microbial growth