uk-dtmh MCQ (SBA): Filovirus Identification

A healthcare worker in Uganda develops fever 5 days after performing a post-mortem examination on a patient who died of an undiagnosed haemorrhagic illness. She develops fever, myalgia, and a maculopapular rash, followed by haematemesis and melaena. Post-mortem samples from the index patient have been sent to a reference laboratory. Electron microscopy of the samples reveals filamentous virus particles. What family of viruses is most likely?