LONDON (Reuters) - Scientists have found a superbug strain of gonorrhea in Japan that is resistant to all recommended antibiotics and say it could transform a once easily treatable infection into a global public health threat. The new strain of the sexually transmitted disease called H041 cannot be killed by any currently recommended treatments for gonorrhea, leaving doctors with no other option than to try medicines so far untested against the disease. Magnus Unemo of the Swedish Reference Laboratory for Pathogenic Neisseria, who discovered the strain with colleagues from Japan in samples from Kyoto, described it as both alarming and predictable.