Following up on the post on ProMED-mail last Saturday, 25 Jun , today [1 Jul 2016] at 4:25pm I submitted to ProMED-mail a brief request to include the novel "SOSUGA" (from SOuth Sudan and UGAnda) paramyxovirus as a potential cause of the still-undiagnosed hemorrhagic fever illness in South Sudan (and also the larger one in Darfur in 2015). US CDC developed an RT-PCR and ELISA for IgM and IgG for Sosuga virus after the single case of a VHF [viral hemorrhagic fever]-like illness in a US wildlife biologist in 2012.
I do not know if the laboratories in Uganda, Senegal, and South Africa that tested samples from the outbreak in South Sudan have these assays for Sosuga. The lab results for 10 viruses reported in the 25 Jun  Lancet commentary, and 19 May  WHO Disease Outbreak News, did not include Sosuga. In 2015 Sosuga was reported in the wide-ranging Sub-Saharan Egyptian rousette bats in several locations in Uganda. So at this late point still without an explanation (viral, non-viral, or non-infectious) it seems warranted to include testing for Sosuga.
-- Daniel Lucey, MD, MPH Georgetown University Medical and Law Centers, ProMED-mail consultant for Middle East (MENA) and South Asia
[ProMED thanks Dr. Lucey for his comments. Apparently, Sosuga virus had not been included in tests done on the individuals involved in the hemorrhagic fever outbreak in South Sudan, and one hopes that samples from the 52 suspected cases and 10 deaths are still available for further testing.
[The possibility of Sosuga virus as the etiological agent raises some interesting epidemiological questions. If fruit bats are the main reservoir of the virus and source of human infection, it seems odd that the 52 suspected cases would be exposed to these bats, and infected, and become ill within a relatively short period of time. Perhaps the bats shed virus and contaminate a common source of food or drink for the community, similar to the situation with Nipah virus and fruit bats in Bangladesh. Another possibility is person-to-person transmission, although health officials indicate that there is no evidence for that.]