New Contact Agar Medium from Heipha for Difficult to Neutralise Disinfectants
Heipha Dr. Muller has launched a new culture medium for environmental monitoring of surfaces or personnel which will inactivate residues of new generation, difficult to neutralise disinfectants in order to detect viable microorganisms in isolators and cleanrooms.
The formulation of the basic medium complies with the recommendation of the current EP and USP (European and US Pharmacopoeia) for Tryptic Soy Agar. To inactivate residues of disinfectants, the medium is supplemented with a mixture of active ingredients called Neutralizer A.
Classically, environmental monitoring media are supplemented with lecithin, Tween 80, histidine or thiosulphate or enzymes such as penase or cephase in order to neutralise residual disinfectants, penicillins and other ?-lactam antibiotics. Heipha ICR media makes use of these different combinations of neutralisers. However, residuals of newer generations of quaternary ammonium compounds and biguanides cannot be neutralised satisfactorily.
“heipha have demonstrated that the current media and combinations of neutralisers available for environmental monitoring does not satisfy the current requirements of the pharma and biopharma industries. Our new tryptic soy contact agar with neutraliser A has been extensively tested alongside widely used commercial disinfectants and we can demonstrate TSA with Neutraliser A successfully neutralises residuals of these disinfectants, where traditional neutralisers fail”. Rob Nixon, Biotest UK.
The Tryptic Soy Contact Agar with Neutralizer A – ICR+ is suitable for determining the total viable count on sanitized, dry surfaces in isolators and clean rooms (ICR = Isolator and Clean Rooms), and as such is one product for all hygiene monitoring purposes.
The contact plates are triple bagged and gamma-irradiated in the final packaging. The plate model (plus or „+“) is supplied with a lockable lid. For safe transport after sampling as well as for aerobic incubation the plates can be locked in the “CLOSED”-position. For anaerobic or microaerophilic incubation the lid can be locked in the “VENT”-position.
These plates, in keeping with our ICR product range, are room temperature storage and currently have a 3 months shelf life.