Johnson & Johnson has recalled several lots of surgical sutures in the United Kingdom because of a risk they are unsterile, according to the Associated Press. The recall began in late-December but U.K. regulators posted a notice about the action online recently. The sutures are marketed under the brand names: Ethilon, Ethibond, Mersilene and Mersilk. The polyester and nylon devices are used to close surgical incisions and wounds. Some of the products may not have been sealed properly, posing a risk that they could become infected, according to the online notice. J&J said that the problem was caused by modifications of manufacturing equipment that have since been corrected. The company has issued 20 recalls since September 2009.