Method and apparatus for inactivation of biological...

A - Human Necessities – 61 – K

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A61K 35/14 (2006.01) A61L 2/00 (2006.01) A61L 2/10 (2006.01) A61L 2/16 (2006.01) A61M 1/36 (2006.01)

Patent

CA 2304696

Methods and apparatuses are provided for inactivation of microorganisms in fluids or on surfaces. Preferably the fluids contain blood or blood products and comprise biologically active proteins. Preferred methods include the steps of adding an effective, non-toxic amount of an endogenous photosensitizer to a fluid and exposing the fluid to photoradiation sufficient to activate the endogenous photosensitizer whereby microorganisms are inactivated. Other fluids, including juices, water and the like, may also be decontaminated by these methods as may surfaces of foods, animal carcasses, wounds, food preparation surfaces and bathing and washing vessel surfaces. Alloxazines and K- and L- vitamins are among the preferred photosensitizers. Systems and apparatuses for flow-through and batch processes are also provided for decontamination of such fluids using photosensitizers.

La présente invention concerne des procédés et des appareils permettant d'inactiver des micro-organismes présents dans des fluides ou sur des surfaces. De préférence, les fluides contiennent du sang ou des produits sanguins et ils comprennent des protéines bioactives. Selon les procédés préférés, on ajoute une quantité efficace non toxique d'un photosensibilisant endogène à un fluide et on expose le fluide à un photorayonnement suffisant pour activer le photosensibilisant endogène qui, à son tour, inactivera les micro-organismes. Les procédés précités permettent de décontaminer d'autres fluides, y compris des jus, de l'eau et analogues, ainsi que la surface d'aliments, de carcasses d'animaux, de blessures, de surfaces de préparation d'aliments et de surfaces de récipients de nettoyage ou de récipients destinés au bain. Les alloxazines et les vitamines K et L figurent parmi les photosensibilisants préférés. L'invention concerne également des systèmes et des appareils de traitement continu ou discontinu permettant la décontamination de ce type de fluides à l'aide des photosensibilisants précités.

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