Anaerobic Culture Bag System

What is the Anaerobic Culture Bag System?

An anaerobic culture bag system uses a sealed flexible pouch and a gas-generating sachet to create anaerobiosis around one or a few plates. It gives a low-cost, single-use option for small numbers of samples.

Overview

An anaerobic culture bag system places one or a few plates inside a transparent, gastight pouch together with a gas-generating sachet and an indicator. When activated, typically with a small amount of water or by crushing an inner ampoule, the sachet consumes oxygen and releases carbon dioxide, and the sealed bag holds the reduced atmosphere. The bag is then incubated like a plate. Pouches are single-use, occupy little incubator space and can be written on or labelled with sample identity, which helps traceability. Capacity per bag is limited, so the format suits small sample numbers, duplicate plates or teaching work rather than routine high volume. Atmosphere development depends on correct sealing and the right sachet for the bag volume, and the indicator should be checked at the end of incubation.

How does it work?

Anaerobic systems remove oxygen and hold a reduced environment. Sealed jars and flexible bags use a gas-generating sachet that reacts with water to consume oxygen and release carbon dioxide and hydrogen, while a palladium catalyst combines residual hydrogen with oxygen to form water. Larger chambers repeatedly flush the working volume with a nitrogen, hydrogen and carbon dioxide mixture and circulate the atmosphere through the catalyst to keep oxygen below a few parts per million. Methylene blue or resazurin indicators confirm anaerobiosis by color change, and an anaerobic incubator maintains both the atmosphere and a precise temperature. Airlocks let plates and samples enter without introducing air, and gloves or sleeves allow manipulation inside the chamber.

What are the key features?

• Transparent gastight pouch with write-on surface
• Gas-generating sachet matched to bag volume
• Anaerobic indicator included
• Single-use format reduces cross-contamination risk
• Compact footprint in any incubator

What are the technical specifications?

A typical anaerobic culture bag system configuration offers bag material of Multi-layer transparent film, plate capacity of 1–4 × 90 mm plates per bag, atmosphere of O2 below 1%, CO2 about 5%, gas generation of Water-activated or crush-ampoule sachet, indicator of Methylene blue or resazurin and sealing of Zipper or heat seal. Values are indicative of the product class; the exact figures for each configuration are confirmed on the quotation and the calibration documents supplied with the instrument.

Which applications is it used for?

The Anaerobic Culture Bag System is used in small-batch clinical cultures, food microbiology spot checks, field and remote sampling and teaching laboratories. Across the wider Anaerobic Systems class, laboratories also deploy it for clinical microbiology of anaerobic infections, food microbiology and spoilage testing and environmental and water analysis.

Which standards and certifications apply?

Relevant standards and methods include ISO 15213, ISO 7937, ISO 11133, CLSI M11 and IEC 61010-1. Certification candidates for this model are CE, ISO 9001 manufacturing and Biocompatibility of film; each is to be confirmed for the specific configuration before shipment, and certificates are supplied only where they have been issued.

Place gas-generating jars and bags in an incubator at the required temperature and record the start time, because anaerobiosis develops over one to two hours. Check catalyst activity regularly, since saturated palladium stops working and must be regenerated by heating. Replace indicators each run and keep a log. For chambers and workstations, verify oxygen readings with an independent analyzer, monitor gas supply and pressure, replace gloves when they leak and schedule catalyst and filter service. Avoid introducing large volumes of air through the airlock too quickly. Include anaerobic systems in routine equipment qualification and follow IEC 61010-1 for electrical safety.

How do I select the right Anaerobic Culture Bag System?

Choose bag systems for intermittent work with one to four plates per sample, for field use or where incubator space is limited. In an RFQ specify bag capacity, activation method, indicator type, shelf life and storage conditions, and the volume of sachets you will need per year.

How does it compare with other Anaerobic Systems variants?

Choose by the number of samples, the duration of work and how much manipulation is needed. Anaerobic jars and bag systems suit occasional plates and small batches at low cost, with jars supporting stacked plates and bags giving a single-use option. Anaerobic incubators handle routine plate volumes with temperature control but little access during incubation. Workstations and glove boxes allow continuous plating, subculture and identification under a controlled atmosphere, which is essential for clinical anaerobe work and for slow-growing organisms. Confirm the oxygen level achieved and how it is monitored, the catalyst and indicator system, temperature range and uniformity, airlock and port capacity, gas consumption, and whether an internal incubator is included. For regulated laboratories, ask for validation and calibration documentation.