Summit presents preclinical data on SMT-571 at STI & HIV World Congress
Summit Therapeutics announced that it highlighted the potential of its preclinical new class antibiotic, SMT-571, to treat all gonorrhoea, including multi-drug and extensively-drug resistant strains, in a poster presentation at the STI & HIV World Congress in Vancouver, Canada. Infections caused by the bacteria Neisseria gonorrhoeae are a growing global healthcare problem, with an estimated 78 million new cases globally per year. Infection rates continue to rise sharply as highlighted by the Centers for Disease Control and Prevention, which reported a 19% increase in US gonorrhoea cases in 2017, and Public Health England, which reported a 26% increase in the UK in 2018. Of great concern is the increase in resistance towards the current standard of care treatment for gonorrhoea, a combination of the broad-spectrum antibiotics, azithromycin and ceftriaxone. N. gonorrhoeae resistance rates to azithromycin are 4.4% and rising, and there is an emergence of resistance to ceftriaxone in these same strains, which are referred to as cases of 'super gonorrhoea.' Summit's poster featured preclinical data showing SMT-571 to be highly potent against 262 clinical strains of N. gonorrhoeae. This comprehensive panel of gonorrhoea strains, obtained from 1991 to 2018, was selected to be geographically and genetically diverse and include strains that are multi- and extensively-drug resistant. SMT-571 had a minimum inhibitory concentration range of 0.064 mg/L to 0.125 mg/L against the strains, including those with reduced susceptibility to ceftriaxone. Significantly, SMT-571 did not show cross-resistance with any antibiotic currently or previously used to treat gonorrhoea infections.