Port-Au-Prince , Haiti ( CNN ) -- In the wake of Hurricane Tomas , cholera has reached the congested capital of Port-au-Prince , where as many as 73 people have come down with the potentially deadly infection . Dehydration is one of its tell-tale signs . In a camp in Cabaret , just east of Port-au-Prince , children lie on cots as life-sustaining fluids are pumped intravenously into their bodies . The cholera outbreak in Haiti has now killed 583 people and another 9,123 people have been hospitalized , according to Gabriel Timothe , director general of Haiti 's Ministry of Health . Medical personnel fear rising waters over the banks of Haiti 's Arbonite River , which they say is a source of contamination , have increased the risk of a wider rate of infections . `` We 're doing everything we can to mitigate [ the ] spread , '' Dr. Jon K. Andrus , deputy director of the Pan American Health Organization , said during a press conference on Tuesday . Health officials had braced for problems after Tomas , fearing the hurricane that battered the Caribbean nation over the weekend could worsen the cholera outbreak . On Monday , Dr. Toni Eyssallenne of Hospital Bernard Mevs confirmed the first case of cholera -- in a 3-year-old boy -- to originate and manifest entirely in Port-au-Prince . Two more cases were confirmed Tuesday by Eyssallenne . A 41-year-old woman who contracted the disease has not traveled in a year , the official said . A 33-year-old who lives in a tent city uses a communal water source . She , too , did not bring the infection into the city . Previous cases had been centered in Haiti 's Artibonite and Central Plateau regions , including the city of St. Marc , north of the nation 's capital . Until Monday , health officials said that those being treated for cholera in Port-au-Prince all contracted the disease elsewhere . The young Port-au-Prince boy lived in a tent city across the street from a place that sells macaroni , and he had not traveled in over a year , and he had n't had any contact with people from St. Marc or the Artibonite region , Eyssallenne said . After suffering from nausea and diarrhea , the boy was treated and released from the hospital after his condition improved . Hurricane Tomas ' trek past Haiti killed 20 people and injured another 36 , a Communications Ministry official said Monday . Seven people were missing and 5,954 were homeless , the official said . Health officials fear that the water dumped by the storm will worsen the outbreak . The concern is that overflow from latrines and septic tanks could contaminate the supply of fresh drinking water and contribute to the spread of the bacteria . In the capital , the canals were not overflowing , said American Red Cross spokeswoman Andrea Koppel . But that was not the case in cities west of the capital , which bore the brunt of Hurricane Tomas , she said . Still , even Port-au-Prince looks and smells like a dump -- a caldron of water , garbage and human waste . `` We get used to it , '' said one resident . Ten months after a magnitude-7 earthquake laid waste to much of the nation , people compete with animals scavenging through the ubiquitous dumps for scraps of food . `` The quick solution is management , '' said Environment Minister Jean Marie Claude Germain . `` Management meaning that you have a structure in place , but the structure was not conceived with the slums in mind . '' But most of the residents of Port-au-Prince live in slums . `` We 're working on it , '' Germain said . `` We will work with the private sector . '' CNN 's Paula Newton contributed to this story .
NEW : Two more Port-au-Prince cases confirmed . The official death toll from cholera in Haiti is 583 . More than 9,000 cases have been confirmed . As many as 73 people have come down with cholera in Port-au-Prince .