DAKAR, Senegal, Dhu-AlHijjah 30, 1435, Oct 24, 2014, SPA -- Doctors Without Borders said that a cholera outbreak in the West African country of Niger killed 20 people and has sickened nearly 1,000 people, AP reported. The medical aid group said Friday that several districts in the country's south have been affected. Cholera is caused by the ingestion of infected food or water and often occurs in places with poor sanitation. It causes severe diarrhea and vomiting and can lead to death by dehydration, sometimes within a matter of hours. Doctors Without Borders began working with Niger's Health Ministry to stamp out the cholera outbreak when the first cases were identified last month. -- SPA 20:52 LOCAL TIME 17:52 GMT www.spa.gov.sa/w