Nepalese peacekeepers accused by some of bringing disease as Tropical Storm Tomas heads towards country.
Treatment centres are being prepared in Haiti to deal with the further possible spread of cholera.
The outbreak is believed to have started 10 days ago and has claimed more than 330 lives.
Aid agencies are also mobilising in case Tropical storm Tomas makes landfall.
Al Jazeera’s Craig Mauro reports from Port-au-Prince on the attempts to contain the disease.