"No other epidemic in the world has been as complex as the one we are currently experiencing," the DRC health minister says.
WHO and UN officials say the rate of cases has declined a bit recently.
The drug, zoliflodacin, was highly effective in treating urogenital and rectal infections but not pharyngeal cases.
So far 63 people have been hospitalized, and a patient in California has died.
With 2 new cases, infections in healthcare workers in the DRC have now reached 27.
The outbreak total has reached 305, with 189 deaths and 60 suspected cases.
The researchers estimate that 670,000 infections are caused by select antibiotic-resistant bacteria in a year.
Two of the latest confirmed cases involve a mother and her 2-week-old baby.
Reasons for sharing antibiotics included recipients experiening similar symptoms, saving money, and avoiding another doctor's visit.