In a patient who is septic on arrival, the single most discriminating piece of history is usually the shape of the illness before admission — and it is the piece most often lost when the priority is resuscitation.
A bacterial pneumonia or urosepsis that has run for two days behaves differently from a febrile illness in its second week with a normal white count and a falling platelet count. The second pattern points at enteric fever, leptospirosis, scrub typhus, malaria or dengue long before any test returns, and each of those has a specific drug that broad-spectrum cover does not include. Ask: what day of fever is this, was there a period of improvement, has anyone else at home been ill, was there recent travel, floodwater, or animal contact.
Get the history from whoever came with the patient while the lines are going in. Half an hour later the relative has gone home to fetch documents and the sequence is unrecoverable.
- Establish which day of fever this is, and whether there was a lull before deterioration
- Ask about floodwater and animal exposure — leptospirosis history is rarely volunteered
- Ask about travel and about others ill in the household
- Take the history from the accompanying relative immediately, before they leave
- Note the platelet trend and white cell count together; the combination narrows the list fast
Why it matters
The diagnosis that broad-spectrum cover misses is usually one the history would have named.
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