Health authorities in French Polynesia say despite it being the dry season, dengue has continued to spread, with 49 more people being infected in the last week of August.
One person has been taken to hospital.
Dengue was still present in Tahiti, Bora Bora and Nuku Hiva in the Marquesas, they said in a statement.
There had been no new case of leptospirosis recently, but 125 cases have been registered this year.
Since the beginning of the year 163 people contracted a sexually transmitted infection, they said.