
PDA Technical Glossary
PDA Technical Reports are highly valued membership benefits because they offer expert guidance and opinions on important scientific and regulatory topics and are used as essential references by industry and regulatory authorities around the world. These reports include terms which explain the material and enhance the reader’s understanding.
The database presented here includes the glossary terms from all current technical reports. The database is searchable by keyword, topic, or by technical report. Each definition provided includes a link to the source technical report within the PDA Technical Report Portal.
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- TR 22: Aseptic Process Simulation (5)
- TR 70: Cleaning/Disinfection Programs (2)
- TR 13: Environmental Monitoring (2)
- TR 47: Virus Spikes/Virus Clearance (1)
- TR 51: Biological Indicators (1)
- TR 61: Steam in Place (1)
- TR 63: Clinical Trials Material Preparation (1)
- TR 67: Objectionable Microorganisms (1)
- TR 69: Bioburden/Biofilm Management (1)
- TR 26: Sterilizing Filtration of Liquids (1)
- TR 28: Process Simulation for Bulk API (1)
- TR 44: QRM: Aseptic Processes (1)
- TR 45: Depth Filtration (1)
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Aseptic Processing Simulation (APS)
A means for establishing the capability of an aseptic process as performed using a growth medium. (TR22) (TR62)
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Bioburden
The total number of microorganisms per unit of material prior to sterilization. (TR13) Total number of viable microorganisms on or in a health care product prior to sterilization. (TR22)(TR61)(TR62) A population of viable microorganisms in a fluid prior to sterilizing filtration. (TR26) A measure of the contaminating organisms found in or on a given amount of material before it undergoes a sterilization process. (TR45) (TR70) The number of detectable microorganisms (bacteria and fungi) with which an object is contaminated. It is measured in CFU (colony forming units). (TR47) The number of viable, contaminating microorganisms present on a product immediately prior to decontamination. (TR51) Viable microbial contaminants associated with personnel manufacturing environments (air and surfaces), equipment, product packaging, raw materials (including water), in-process materials, and finished products. (TR 67) (TR 69)
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Biological Safety Cabinet (BSC)
An enclosed, ventilated workspace with engineering controls designed to remove or minimize exposure to hazardous biological materials. A BSC is a principle device to provide containment of infectious splashes or aerosols generated by many microbiological procedures. BSCs are designed to provide personnel, environmental and product protection when appropriate practices and procedures are followed. A cabinet that is designed to protect the operator and the environment from the hazards of handling infected material and other dangerous biological. (TR62)
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Compounding
A process in which a bulk drug substance is combined with one or more excipients and/or another bulk drug substance to produce a drug product. (TR22) A process wherein bulk drug substance is combined with one or more excipients and/or another bulk drug substance to produce a drug product. (TR62) The preparation, mixing, assembling, altering, packaging, and labeling of a drug, drug-delivery device, or device in accordance with a licensed practitioner’s prescription, medication order, or initiative based on the practitioner/patient/pharmacist/compounder relationship in the course of professional practice. Compounding includes the following: • Preparation of drug dosage forms for both human and animal patients • Preparation of drugs or devices in anticipation of prescription drug orders based on routine, regularly observed prescribing patterns • Reconstitution or manipulation of commercial products that may require the addition of one or more ingredients • Preparation of drugs or devices for the purposes of, or as an incident to, research (clinical or academic), teaching, or chemical analysis • Preparation of drugs and devices for prescriber’s office use where permitted by federal and state law. (TR63)
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Critical Area/Critical Zone
An area designed to maintain sterility of sterile materials. Sterilized product, containers, closures, and equipment may be exposed in critical areas. (TR13) (TR22) (TR44) (TR62)
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Environmental Monitoring Program
Defined documented program which describes the routine particulate and microbiological monitoring of processing and manufacturing areas, and includes a corrective action plan when action levels are exceeded. It includes assessment of environmental air, surfaces and personnel. (TR22) (TR28) (TR62)
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First Air (First Work Location)
The work location first in the path of HEPA filtered air. (TR62)
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High-Efficiency Particulate Air (HEPA) Filter
A type of air filter that must satisfy certain standards of efficiency such as those set by the United States Department of Energy (DOE). The air filter must remove 99.97% of all particles greater than 0.3 micrometer from the air that passes through it. (TR62) (TR70)