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agriQ Quest Ltd
About Us
Presentation to Joint Committee of
Experts on Tetanus Toxoid Vaccine
Testing
23rd January 2015
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Background
� The Ministry of Health and Catholic Health
Commission established a joint committee to
investigate the safety of the tetanus toxoid
vaccine administered in the last Kenyan
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vaccine administered in the last Kenyan
vaccination campaigns
� agriQ Quest Ltd was appointed by the joint
committee of experts to carry out analysis on
selected vials of the tetanus toxoid vaccines
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Objective of the Assessment
• Analyze content of the vials sampled for the presence of
beta human chorionic gonadotropin hormone (βhCG)
• Quantify the levels of (βhCG) for each of the samples
where present
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where present
• Full toxicological analysis of the vaccine, identify any other
substances present, apart from the immunogen,
detoxicant and diluents
• Production of a written report - to include procedure for
analysis, relevant references applied to the analysis, citing
publications
• To inform and interpret to the joint committee of experts
the findings from the Laboratory analysis
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Execution of the Assessment
� Sampling and Sample
Submission
� Lot 1 - 10th Dec. 2014 at KEPI
- 14 samples collected
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� Lot 2 - 17th Dec. 2014 at
Upper Hill Medical Center - 4
samples collected
� Lot 3 - Matching samples
submitted to Laboratory - 40
samples
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Objective of the Assessment
� Further instructions from the Pharmacy
and Poisons Board on 17th Dec. 2014
directed the Laboratory to restrict its initial
investigation to:
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investigation to:
� Determining if (βhCG) was present in the
submitted vials
� Quantity of (βhCG) present in each of the vials
tested [this objective later abandoned].
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Analysis Method and Equipment
� Equipment
- Shimadzu Class VP 10 HPLC equipment
� Method
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� Method
- Rapid isolation of hCG using anion exchange
chromatography
- Retention time for the hCG peak - 35mins
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Typical hCG Chromatogram
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Laboratory Results - TT vaccine AQ 42905
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Laboratory Results - TT Vaccine AQ 42906
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Laboratory Results - TT Vaccine AQ 42915
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Laboratory Results - TT Vaccine AQ 42916
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Laboratory Results - Calibration Data
Urine 9 wks pregnancy
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Laboratory Results - Calibration Data
Urine 24 wks pregnancy
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Conclusions from the Analysis
� Three samples of B.Nos. 019L3001B & 019L3001C
found to contain βhCG
� Matching vials submitted did not contain βhCG
� βhCG present in the vials-chemically linked
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� βhCG present in the vials-chemically linked
� Assay for βhCG in its pure form will not produce
such a chromatogram as hCG will be metabolized
� Assay for βhCG that is chemically bonded shows
modification in the chromatogram