Rabies

Rabies and Immunoglobulin Service (RIgS), UK Health Security: 0330 128 1020

Almost always fatal - death from respiratory paralysis
Etiology Lyssavirus. In UK, detected in bats.
Epidemiology any mammal can transmit.
Clinical presentation - Incubation: 3-12 weeks, but as long as YEARS. ("93% of patients - onset within 1 year of exposure")
- paraesthesiae around the site of the wound, fever, headache and malaise
- Encephalomyelitis
Pathogenesis
Diagnostic investigations
Management Wash and disinfect wound e.g. povidone iodine, 70% ethanol etc.
Avoid wound closure until post-exposure prophylaxis has been given
Prevention

higher risk bites/wounds

  • depending on individual country risk profile specific to the animal: https://www.gov.uk/government/publications/rabies-risks-by-country
    • bats are always high risk
  • animal with abnormal behaviour (but does not rule out)
  • unprovoked bites
  • unvaccinated animal (though rarely vaccinated animals have transmitted rabies)
  • domestic animals should be observed for 15 days after bite for abnormal behaviour
  • Broken skin - single or multiple transdermal bites, severe lacerations, or where mucous membranes or an existing skin lesion have been contaminated by the animal’s saliva or other body fluid.
    • Intact skin is a barrier against infection
    • bat bites in the UK may not be visible

risk assessment - details needed

  • patient name, date of birth, age, address, and NHS number if possible
  • date of exposure
  • species and current health status of animal involved if possible
  • country of exposure
  • category of exposure
  • site (on body) of exposure
  • whether the patient is immunosuppressed or has any allergies
  • any previous rabies vaccinations or immunoglobulin treatment
  • weight of the patient if HRIG is being considered

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