Historical cause of death 1600s-1800s
What did thrush mean on a death certificate?
On a death record, thrush meant a white fungal infection coating an infant's mouth and throat, fatal when it stopped a weak baby feeding. In modern terms it usually pointed to oral candidiasis, fatal only with severe underlying weakness. In adults on old records it marks the final stage of another illness, and searchers listed it among the causes of the dying, not the disease. Expect it on records mostly 1600s-1800s.
Also written on records as: aphthae, sore mouth, white mouth.
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Related terms
Browse the full genealogy records glossary for more occupations, causes of death, and legal terms.
FAQs
What is thrush called today?+
Oral candidiasis, fatal only with severe underlying weakness, broadly speaking. Doctors of the period diagnosed without laboratory tests, so one label often covered several conditions we would now separate. This page explains historical record language and is not medical advice.
How was thrush written on death records?+
Clerks and doctors also wrote aphthae, sore mouth, and white mouth. Spelling wandered from register to register, so check every variant before you decide a record is missing or wrong.
Where do these definitions come from?+
They are drawn from period dictionaries, government archive glossaries, and standard genealogy references, cross-checked against each other; provenance is documented with the dataset. Inside AncestorIQ, Deep Research reads the record itself and explains terms like this in context, against your ancestor's own document.
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