Standard Operating Procedure for Contaminant Identification and Root Cause Analysis in Biosimilar Manufacturing

Department	Biosimilars
SOP No.	SOP/BS/148/2025
Supersedes	SOP/BS/148/2022
Page No.	Page 1 of 10
Issue Date	04/05/2025
Effective Date	06/05/2025
Review Date	04/05/2026

1. Purpose

To establish a structured approach for identifying contamination events and performing root cause analysis (RCA) in biosimilar manufacturing, ensuring implementation of corrective and preventive actions (CAPA) and maintaining GMP compliance.

2. Scope

This SOP applies to all microbial, particulate, or chemical contamination events detected during upstream or downstream processes in GMP production, QC labs, and cleanrooms of biosimilar manufacturing facilities.

3. Responsibilities

• Production: Immediately report suspected contamination and isolate affected area/product.
• QC Microbiology: Identify, culture, and classify the contaminant.
• QA: Lead RCA process, approve CAPA, and ensure documentation and closure.

4. Accountability

The Quality Assurance Head is accountable for ensuring all contamination events are investigated, root causes identified, and CAPA executed and tracked to completion.

5. Procedure

5.1 Contamination Detection

1. Contamination may be detected via:
   • In-process testing (e.g., turbidity, pH shift, unexpected microbial growth)
   • Environmental monitoring (EM)
   • Sterility testing or culture failures
2. Immediately document findings in Annexure-1: Contamination Incident Report.

5.2 Immediate Actions

1. Isolate affected equipment, batch, or area.
2. Stop operations and prevent further contamination spread.
3. Inform QA and QC within 1 hour.

5.3 Contaminant Identification

1. QC to collect swab samples, air plates, fluid samples, etc.
2. Use standard microbiological techniques:
   • Gram staining
   • Colony morphology
   • Biochemical or PCR-based identification (Annexure-2)
3. If chemical contamination suspected, use FTIR, HPLC, or MS analysis.

5.4 Root Cause Analysis (RCA)

1. QA to initiate structured RCA within 24 hours using:
   • 5 Whys Technique
   • Fishbone (Ishikawa) diagram
   • FMEA if required
2. Document findings in Annexure-3: RCA Worksheet.

5.5 Corrective and Preventive Actions (CAPA)

1. Based on root cause, define:
   • Immediate corrective actions
   • System-level preventive actions (e.g., training, SOP revision, design change)
2. Track in Annexure-4: CAPA Log and assign completion timeline and responsible personnel.

5.6 Reporting and Closure

1. Submit final investigation summary to QA Head.
2. Close the incident in the deviation management system within 30 working days.

6. Abbreviations

• RCA: Root Cause Analysis
• CAPA: Corrective and Preventive Action
• QC: Quality Control
• EM: Environmental Monitoring
• FTIR: Fourier-transform infrared spectroscopy

7. Documents

1. Contamination Incident Report – Annexure-1
2. Microbial/Chemical Identification Report – Annexure-2
3. Root Cause Analysis Worksheet – Annexure-3
4. CAPA Log – Annexure-4

8. References

• ICH Q9 – Quality Risk Management
• FDA Guidance on Sterile Manufacturing
• WHO TRS 986 – GMP for Biologics

9. SOP Version

Version: 2.0

10. Approval Section

	Prepared By	Checked By	Approved By
Signature
Date
Name
Designation
Department

11. Annexures

Annexure-1: Contamination Incident Report

Date	Location	Batch No.	Description	Detected By
03/05/2025	Bioreactor-3	BS-UB-072	Turbidity + pH drop	Ajay Verma

Annexure-2: Microbial/Chemical Identification Report

Sample ID	Type	Method	Result	Analyst
SMP-BIO-072	Microbial	Gram Stain + PCR	Bacillus subtilis	Sunita Reddy

Annexure-3: RCA Worksheet

Tool Used	Root Cause	Supporting Evidence	Investigator
Fishbone	Valve not sterilized post-maintenance	Cleaning log missing	QA Analyst

Annexure-4: CAPA Log

CAPA ID	Action	Assigned To	Due Date	Status
CAPA/BS/073	Revise valve cleaning SOP and retrain	Production Head	10/05/2025	Open

Revision History:

Revision Date	Revision No.	Revision Details	Reason for Revision	Approved By
04/05/2025	2.0	Incorporated chemical contamination assessment and PCR methods	Scope Expansion