Ebola

  • Ebola virus disease (EVD), formerly known as Ebola haemorrhagic fever
  • natural hosts - thought to be fruit bats.
  • rare but severe, often fatal.
  • Average case fatality rate is around 50%. Has varied from 25% to 90% in past outbreaks.
  • spreads through human-to-human transmission via direct contact (through broken skin or mucous membranes) with:
    • Blood or body fluids from living or dead
    • Objects that have been contaminated with body fluids
    • ceremonial burials also a source
  • incubation period: 2-21/7.
  • not contagious unless symptomatic.
Clinical

Symptoms can be sudden and include:

  • Fever, Fatigue, Muscle pain
  • Headache, Sore throat
  • Vomiting, Diarrhoea
  • Rash
  • Symptoms of impaired kidney and liver function
    • internal and external bleeding
  • Ix: low WCC & platelet counts and elevated LFTs.
  • Specific labs:
    • antibody-capture enzyme-linked immunosorbent assay (ELISA)
    • antigen-capture detection tests
    • serum neutralization test
    • reverse transcriptase polymerase chain reaction (RT-PCR) assay
    • electron microscopy
    • virus isolation by cell culture.
Treatment
  • supportive primarily - trials with blood products, immunotherapies, antivirals
    • monoclonal antibodies (Inmazeb and Ebanga) have been approved
  • Ervebo vaccine is effective
References include: