Glucosamine sulfate--environmental antibacterial activity.

We have recently showed antibacterial activity against E. coli in vitro of a trademark Mega-Gluflex-containing glucosamine sulfate (GS) and chondroitin sulfate (CS). The purpose of this study was to examine the antibacterial activity of GS as a new trademark Arthryl (Manufacturer Rottapharm Ltd, Ireland; Distributor in Israel Rafa Laboratories Ltd) in vitro. We used cabbage and chicken broths and milk (every media of 20 ml) left opened for 1 week with and without Arthryl supplements 1,500 mg, the content of one package of the medication. A similar volume (20 ml) is ingested in taking the medication. Experiments with three repeatable results were taken for consideration. Arthryl inhibited environmental bacterial colonies' growth in every media but fungi growth was not impaired. Milk stayed liquid for the whole week with supplement of the Arthryl compared with sour milk transformation without Arthryl. Sample B showed inhibitory properties of the bacterial colonies on the fungi growth. The sample with Arthryl showed progressive growth of fungi without bacterial growth after 10 days of follow up compared with bacterial growth on media without Arthryl. Glucosamine sulfate as a new trademark Arthryl has environmental antibacterial properties but does not inhibit growth of fungal colonies.