(USATODAY) — With a dwindling arsenal of effective treatments, physicians have worked together to add two more weapons in the fight against gonorrhea, a common sexually transmitted disease that has become resistant to a primary antibiotic method used to treat it.

Federal researchers this week will announce the result of a trial of the new treatments at an international conference on sexually transmitted diseases in Vienna.

The clinical trial, funded and conducted by the Centers for Disease Control and Prevention and the National Institute of Allergy and Infectious Diseases, included 401 infected men and women ages 15-60, who were given two different combinations of injectable and oral antibiotics widely available in the USA. Results showed a 100% rate of effectiveness in one combination of antibiotics (injectable gentamicin with oral azithromycin) and a 99.5% rate of success in the other (oral gemifloxacin with oral azithromycin). Both solutions cured infections in the throat and rectum 100% of the time.

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