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Listeria

Published on Nov 25, 2015

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PRESENTATION OUTLINE

1.

SURVIVAL NEEDS

what do we need to be able to survive?
Photo by chefranden
2.

FOOD

Photo by xavi talleda
3.

WATER

Photo by Taylor.McBride™
4.

OXYGEN

Photo by Michael Bentley
5.

NOT TOO HOT

temperature control
Photo by WanderingtheWorld (www.ChrisFord.com)
6.

NOT TOO COLD

temperature control
Photo by Adam Clarke
7.

PROTECTION

SHELTER, CLOTHING
Photo by David Basanta
8.

MICROBES MAY
HAVE SIMILAR NEEDS

Photo by CIMMYT
9.

THEY NEED

  • OXYGEN
  • FOOD
  • WATER
  • TEMPERATURE
  • SHELTER
10.

Bacteria can find all those things in the foods we eat.

Photo by Great Beyond
11.

FOODS WOULD BE LESS LIKELY TO ALLOW BACTERIA AND MOLDS TO GROW IN THEM IF:

Photo by chexee
12.

NO OXYGEN

Photo by Vox Efx
13.

DRY

LOW WATER
Photo by JeepersMedia
14.

HIGH SALT

(LESS WATER)
Photo by Christian Collins
15.

HIGH SUGAR

(LESS WATER)
Photo by Miikka Skaffari
16.

ACID pH

Photo by cote
17.

COLD

Photo by Stephanie Booth
18.

HOT

Photo by chrismar
19.

CHEDDAR CHEESE HAS:

  • pH 5.0 - 5.3
  • Aw(moisture) 0.95
Photo by richard_north
20.

LISTERIA

monocytogenes
Photo by Microbe World
21.

TOLERATES

  • REFRIGERATION
  • HIGH TEMPERATURES
  • HIGH SALT
  • NITRITES
  • ACIDITY
  • LOW OXYGEN
Photo by Leo Reynolds
22.

NO GROWTH

  • pH
  • low water (Aw
  • frozen food
Photo by Peter Kaminski
23.

PASTEURIZATION

killed by
Photo by grongar
24.

listeria can grow in:

25.

raw milk

Photo by Karen Roe
26.

compressed air

Photo by Chris Hunkeler
27.

food contact surfaces

machinery, conveyors
Photo by Ian E. Abbott
28.

containers

Photo by gibsonsgolfer
29.

cutters, utensils

Photo by hlanchas
30.

gloves!!!

Photo by somegeekintn
31.

non-contact surfaces

machinery framework
Photo by a.pitch
32.

cracked hoses

Photo by Theen ... Dad getting worse
33.

air filters

Photo by TheLugash
34.

drip pans

Photo by LadyDragonflyCC - >;<
35.

tools

Photo by tunnelarmr
36.

forklifts

Photo by Elsie esq.
37.

hand trucks

Photo by nim
38.

racks

Photo by dolbinator1000
39.

on/off switches

Photo by kevin dooley
40.

vacuum cleaners

Photo by WordRidden
41.

floor scrubbers

Photo by erix!
42.

trash cans

Photo by quinn.anya
43.

aprons!!!

Photo by LilyWhitesParty
44.

plant environment

Photo by polapix
45.

floors

Photo by bossco
46.

walls

Photo by Electrolux Design Lab
47.

drains

Photo by HomeSpot HQ
48.

wash areas

Photo by clayjar
49.

wet areas

Photo by A National Acrobat
50.

rubber seals

Photo by comedy_nose

ANTONIO PEREZ