Viral exanthems
Fever and rash in an adult, measles recognition, isolation and post-exposure prophylaxis, varicella in adults and pregnancy, parvovirus B19 and rubella, and the mimics that kill (meningococcaemia, dengue, toxic shock, drug reactions).
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Written with AI assistance and fact-checked against the sources below. For exam study, not clinical decisions. How notes are made
At a glance
- Most fever-plus-rash in adults is viral and self-limiting. The work is spotting the few patients who are dangerous to themselves (meningococcaemia, toxic shock, SJS, dengue) or to others (measles, varicella, rubella).
- Measles is back with imported cases each year. Suspect it in anyone with fever, cough, coryza, conjunctivitis and a rash, especially after travel. Isolate first, then test, and phone public health on suspicion.
- Varicella is more severe in adults, particularly smokers, pregnant women and the immunocompromised.
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Sources
- Australian Immunisation Handbook, Measles chapter (including post-exposure prophylaxis table)AU/NZAustralian Government Department of Health, Disability and Ageing (ATAGI), updated 30 September 2026
- Australian Immunisation Handbook, Varicella (chickenpox) chapterAU/NZAustralian Government Department of Health, Disability and Ageing (ATAGI), updated 30 September 2026
- Therapeutic Guidelines: Antibiotic (varicella, herpes zoster)AU/NZTherapeutic Guidelines Limited (eTG complete), current eTG edition (topic version not verified)
- Last updated
- 14 November 2026
What changed
- 14 November 2026 Personal emails, About story and Australian-style copy