GENEVA - PAKISTAN has confirmed 99 cases of cholera from across flood-affected areas, as well as outbreaks of a rare tick-borne disease and a surge in dengue fever, the World Health Organization said Monday.

The cholera cases cover the period from the start of the floods in late July to the end of September, the UN health agency.

WHO said it was alerted by Pakistan on Oct. 12 and is working with local and international groups to contain and treat the highly contagious disease. It didn't immediately explain the delay in publishing the event.

Cholera can cause vomiting and diarrhea so severe it can kill from dehydration in hours. The Pakistan government has also reported 26 cases - including three deaths - of Crimean-Congo hemorrhagic fever, WHO said.

The disease, which is spread by ticks and other insects but rarely affects humans, typically kills 30 per cent of patients, according to a WHO fact sheet.

Meanwhile, Pakistan's Ministry of Health has reported more than 1,500 laboratory-confirmed cases of dengue fever, including 15 deaths, WHO said. It said the floods, which submerged large areas of Pakistan, likely contributed to a rise in cases of these diseases.

99 cases of cholera in Pakistan