Lecture #5. Maintenance of QC Organisms_Indonesia 2015
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Transcript of Lecture #5. Maintenance of QC Organisms_Indonesia 2015
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7/23/2019 Lecture #5. Maintenance of QC Organisms_Indonesia 2015
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Maintenance of Quality ControlStrains
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7/23/2019 Lecture #5. Maintenance of QC Organisms_Indonesia 2015
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OUTLINE
• Selection of Strains for QC
• Testing
•
Storage• Maintenance
2
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7/23/2019 Lecture #5. Maintenance of QC Organisms_Indonesia 2015
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Selection of Strains for
QC•
Reference stock cultures should beobtained from a recognized source (e.g.ATCC) a!ailable in l"o#hilized state
• Recommended QC strains and e$#ected
QC ranges (C%S& M')Routine QC strains* and su##lemental QCstrains*
• +sers of commercial s"stems should follo,the QC recommendations in that s"stem-sinstructions for use
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7/23/2019 Lecture #5. Maintenance of QC Organisms_Indonesia 2015
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Commercial l"o#hilizedstrains are stored at 201oC intheir original #ackage untile$#ir" date
Selection of Strains for
QC (2)
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7/23/2019 Lecture #5. Maintenance of QC Organisms_Indonesia 2015
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C%S& M'0S2 3A45 //
Selection of Strains for
QC (3)
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7/23/2019 Lecture #5. Maintenance of QC Organisms_Indonesia 2015
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Testing of QC Strains
• QC strains are tested regularl" dail"
,eekl"
ne, batch6lot or shi#ment
• Al,a"s use fresh organisms for QCtesting
• Select isolated colonies for the test
• 7o not test colonies from acontaminated #late
8
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7/23/2019 Lecture #5. Maintenance of QC Organisms_Indonesia 2015
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Testing of QC Strains (2)
• A frozen or l"o#hilized QC organismshould be started on a non0selecti!eagar (TSA9 :A3)
• 7o not test the original #ellet #late.
This is the #late on ,hich thefrozen6l"o#hilized #ellet ,asstarted
The organisms gro,ing on this#late are not full" resuscitated.
;
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Storage of QC Strains
3ro#er organism storage andmaintenance is re<uired to ensureacce#table #erformance
• %"o#hilized (commercial)9 store at 201oC
• =or long0term storage9 store at 08oC
Medium> '0'? gl"cerol in tr"#tic so"broth9 skim milk9 de@brinated shee# blood
+se cr"ogenic !ials (cr"o!ials)
1
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Storage of QC Strains (2)
At minus 8oC9microorganisms incr"o#reser!ati!e medium canbe stored for se!eral "ears
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=or short0term storage>• Store aerobic bacteria at 201oC
• Store fastidious organisms at room
tem#erature or at oC in CB2
• Store Cam#"lobacter at oC (/2oC)in microaero#hilic conditions
• Store anaerobes in anaerobicconditions at 201oC
'
Storage of QC Strains (3)
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''
Microorganism Maintenance 3lan A
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'2
Microorganism Maintenance 3lan :
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Thank you
'