International health officials said they are seeing fewer new cases of cholera in Haiti, as prevention measures and an influx of aid help slow the spread of the disease. Nonetheless, health officials said they still expect the disease to spread further, particularly in the nation's crowded capital, The Wall Street Journal reports.

More than 250 people have died and more than 3,100 have been infected since the epidemic was identified last week, the Pan American Health Organization said. The numbers were little changed from those reported Sunday. But, "we expect the numbers to rise," PAHO Deputy Director Jon Andrus warned in a news conference Monday.

Now that cholera is in Haiti, it is likely to be around for some time, he said. The true scope of the disease is likely much greater than the official tally because about 75% of those infected show no symptoms, yet carry and can spread for up to two weeks the bacteria, which can cause violent diarrhea, vomiting and rapid dehydration, Dr. Andrus said.

He noted that more than 500,000 cases were reported over a two-year period when cholera broke out in Peru. Sporadic outbreaks also occurred for several years after that, he said.

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