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UN health experts rushed to northern Haiti to help tackle a sudden outbreak of diarrhoeal disease that has left 150 dead, after some initial tests showed traces of cholera, the WHO said.
If confirmed, it would mark the first time that cholera has been reported in Haiti for more than a century, the World Health Organisation added.
"Some stool samples were positive for cholera by rapid diagnostic tests," said WHO spokeswoman Fadela Chaib.
"Stool samples were taken to a laboratory in Port-au-Prince for laboratory confirmation. So final confirmation that it is or not cholera is still pending," she added.
The WHO spokeswoman said Haitian authorities asked for assistance with the outbreak of diarrhoea and vomiting.
Nature of illness unconfirmed
"Although we cannot confirm the nature of this illness until the laboratory results are given to us we are concerned at the speed with which it has spread," Chaib said.
Haitian officials said that 135 people had died and 1,500 people were taken ill with the disease.
The outbreak is being blamed on the Artibonite river, an artery crossing Haiti's rural centre that thousands of people use for much of their daily activities from washing to cooking.
The WHO said that 150 had died, with the same number infected.
Claude Surena, president of the Haitian Medical Association, said that laboratory analysis on the outbreak in Saint Marc, about 100 kilometres north of the capital Port-Au-Prince, showed it was cholera.
The WHO said samples from hospitalised patients were being tested for different diarrheal-disease pathogens, including the cholera bacteria.
Mobile medical teams
Chaib said: "Medical teams have been mobilised including epidemiologists from our office in Washington, medical supplies are being provided to the local hospitals, including 10,000 boxes of rehydration tablets and water purification sachets."
More teams of international health experts in Haiti were also travelling to the area to assist the local authorities, she added.
The epidemic has grown in the past few days, but had not reached the major camps for displaced people in and around Port-au-Prince further south.
The city was ravaged by a 7.0 earthquake in January 2010 that left 1.2 million people homeless.
But officials in the country fear that an outbreak in densely-populated tent cities that have poor sanitation and meagre medical facilities has the potential of unleashing a public health disaster.
(Sapa, October 2010)
Read more:
Cholera hits hundreds in Haiti
