|A sand fly: BBC News.com|
The number of cases of a potentially fatal parasitic disease has increased six-fold in southern Sudan.
Visceral leismaniasis- also known as kala-azar - is the most severe form of the disease.
More than 6,000 people have been infected and over 300 have died in the last year.
The World Health Organization and the Sudanese ministry of health are leading the distribution of treatments and testing equipment to affected areas.
Visceral leishmaniasis is caused by the Leishmania parasite and transmitted via the bite of an infected sand fly.
It is the most dangerous form of the disease because the parasite migrates into the spleen and liver.
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