What is meant by Operational and Personnel Hygiene in a GMP Environment?

Operational and personnel hygiene in pharmaceutical manufacturing essentially refers to all organisational, structural/technical and personnel-related measures that prevent contamination (microbiological, particulate, chemical - including impurities and cross-contamination) and thereby ensure the quality, safety and efficacy of the medicinal product. These requirements are a central component of Good Manufacturing Practice (GMP).

1. Personnel hygiene (what is meant by this?)

Humans are one of the most common sources of contamination in clean production areas. They can cause both particulate and microbiological contamination of the environment and the medicinal product. This is due, on the one hand, to the constant microbiological flora on the skin and in the gut, and on the other hand, to temporary increases in microbiological load, e.g. during illness. Personal hygiene comprises rules and measures designed to ensure, as far as possible, that employees do not become a source of contamination - particularly in cleanrooms or during aseptic activities.

Framework of personal hygiene:

• Health status & reporting obligations: As a rule, an initial medical examination is carried out by the company doctor. In addition, training is provided on dealing with infectious diseases, wounds and skin infections, as well as any resulting restrictions on work or access. Fresh tattoos and piercings must also be taken into account
• Hygiene practices: These include, for example, hand hygiene (correct hand washing and disinfection / glove disinfection), a ban on eating, drinking and smoking in controlled areas, no jewellery, make-up or perfume (depending on the area), and behaviour aimed at minimising particles - i.e. minimising movement and moving slowly - behaviour when sneezing/coughing and handling injuries/wounds (see above)
• Protective and cleanroom clothing (gowning): This concerns zone-specific, suitable, appropriate clothing, including change/cleaning rules; correct dressing procedures; gloves, masks, hair protection, and, where necessary, goggles/visors. Specific guidelines for entering and exiting cleanrooms with the disposal of clothing and single-use materials (important afterwards: qualified washing and, where necessary, sterilisation of the clothing (reprocessing))
• Access regulations: Only authorised/trained personnel may enter the cleanrooms. There must be clear visitor rules and regulations for external personnel (cleaning staff, technicians, etc.)
• Training & Qualification: GMP and hygiene training is provided initially and on a recurring basis; in aseptic production areas, this is supplemented by training in basic aseptic techniques: qualification via a filling simulation (aseptic process simulation/APS). Topics covered in the training include, for example, the fundamentals of microbiology, entry and exit procedures (including gowning qualification for critical areas (RRK A/B)), cleaning and disinfection, and the handling of hazardous substances (cleaning agents and disinfectants) for cleaning staff. Important: External personnel such as external cleaning staff, service technicians, etc. must also be trained

2. Operational hygiene (what does this mean?)

The term 'operational hygiene' describes/encompasses the hygienic design and operation of rooms, facilities, and the flow of materials and people - to ensure that the environment does not contaminate the product. Contamination from surfaces in contact with the product, air, particulate abrasion or pests are just a few examples of potential sources of contamination in the workplace.

Contents of operational hygiene

• Hygienic design of rooms & equipment: This includes, for example, requirements for surfaces such as cleanability, suitable materials (resistance to abrasion, cleaning agents and disinfectants, no release of chemicals), separation of areas/processes (zone concept), e.g. to prevent the spread of contamination/cross-contamination
• Cleaning and disinfection programmes: The programme includes defined SOPs, specified cleaning agents/disinfectants, frequencies of implementation, responsibilities, proof of efficacy provided by the manufacturer and, where applicable for areas covered by Annex 1, disinfection validation (evidence against reference strains and in-house isolates on the surfaces used at the concentrations applied)
• Contamination control measures: These include: cleanroom zoning concept with defined material and personnel flows, airlocks for materials and personnel, pressure cascades, directional airflow/HVAC, cleanroom zone classification, environmental and personnel monitoring.
• Pest monitoring & waste management: Clearly regulated disposal, including of critical substances and waste; pest control programme to prevent the entry/establishment of pests such as insects, rodents, etc.
• Utility supply systems: e.g. water qualities (PW/WFI), steam, gases - including their monitoring.
• Material transfer: Risk minimisation through material transfer chambers with defined recovery times, use of reusable packaging, disinfection chambers and pass-through autoclaves, etc.

3. Regulatory framework

In practice, requirements for operational and personnel hygiene are usually embedded in the following types of documents:

• Laws/Regulations (DE): The regulations and guidelines on GMP that form the basis in Europe are generally transposed into national law; for example, in Germany, the “Regulation on the Application of Good Manufacturing Practice in the Manufacture of Medicinal Products and Active Substances and on the Application of Good Professional Practice in the Manufacture of Products of Human Origin (AMWHV) or the German Medicines Act (Arzneimittelgesetz - AMG).  In France, the Code de la santé publique (CSP) would be the corresponding body of legislation or in Italy the Decreto Legislativo n. 219/2006
• GMP Guidelines: EU GMP Guide Part 1 (particularly Chapter 2 and, for sterile products, Annex 1). These are based on the following EU regulations:
  - Directive 2001/83/EC (Article 47): This is the fundamental EU directive on medicinal products for human use, which prescribes the GMP guidelines for manufacture and import.
  - Directive (EU) 2017/1572: This supplements Directive 2001/83/EC with regard to the principles of Good Manufacturing Practice.
  - Regulation (EU) 2019/6: This forms the basis for veterinary medicinal products.

4. Operational Implementation and Contamination Control Strategies

Since the current Annex 1 of the EU GMP Guidelines became effective, all these measures generally fall under the overarching framework of a Contamination Control Strategy (CCS), which links and harmonises them across departments. It is designed to ensure that no gaps arise across different areas of responsibility (quality assurance, quality control, production, engineering, etc.). A CCS encompasses all measures designed to prevent microbiological, particulate and endotoxin contamination: e.g. hygiene plans/SOPs, cleaning and disinfection plans, gowning instructions, training plans, monitoring plans (which are checked against the above-mentioned rules during inspections), etc., as well as the measures for their implementation.

Although the requirement is set out in Annex 1 for sterile manufacturing, it can also be adapted for non-sterile production areas. Annex 1 itself emphasises that many of the principles mentioned there are also applicable to non-sterile areas.

5. Relevant guidelines and literature

5.1. Opeational hygiene:

• AMWHV (Germany): Implements GMP requirements for medicinal products/active substances; key provisions include Section 4 (Personnel) and Section 5 (Premises and Equipment) (and the QMS).
• EU GMP Guide (EudraLex, Volume 4): contains the detailed GMP chapters (including personnel, premises/equipment and production) as the authoritative interpretation across the EU.
• For the US market, the requirements for medicinal products are set out in the Code of Federal Regulations (CFR), Title 21, Teile 210 und 211. The requirements are interpreted in the Food and Drug Administration’s (FDA) ‘Guidances for Industry’
•  VDI 2083 Reinraumtechnik, Blatt 1, Blatt 9.2
• Wallhäußers Praxis der Sterilisation, Desinfektion, Aseptik und Konservierung,  Axel Kramer und Ojan Assadian, Thieme
• Pharmaceutical Microbiological Quality Assurance and Control, David Roesti und Marcel Goverde, Wiley
• USP <1072> Disinfectants and Antiseptics (currently in review)
• Code de la santé publique, Version en vigueur au 14 juillet 2026

5.2. Personnel hygiene:

• EU GMP Guide, Part I, Chapter 2 "Personnel" (contains specific requirements regarding hygiene, clothing, training and health aspects).
• For sterile manufacturung specifically: EU GMP Annex 1 "Manufacture of Sterile Medicinal Products" (including requirements regarding the number of staff in the cleanroom, gowning procedures, and conduct).
• US cGMP 21 CFR 211.28 "Personnel responsibilities" calls for, among other things, clean, appropriate clothing and good hygiene practices.
• Guidance for Industry Sterile Drug Products Produced by Aseptic Processing - Current Good Manufacturing Practice
• Pharma Technologie Journal, Gute Hygiene Praxis, 3. Revised and expanded edition, Editio Cantor Verlag
• Hygiene in der Arzneimittelproduktion, Michael Rieth und Norbert Krämer, Wiley-VCH

Please also see a relevant selection of training courses on personnel and operational hygiene.