Abstract
Using the immune system to its advantage, Salmonella Typhi initially invades the gut followed by the reticuloendothelial system and nally the nervous system, involvement of which usually occurs around the second week of fever. In developing countries, delayed diagnosis is predominantly due to hesitation in seeking treatment. Our subject presented with fever since one week, altered mentation, headache and neck pain; she was diagnosed with enteric fever. Although her neurological abnormality could be a complication of the infection, it appeared when she became afebrile- hence we evaluated her for autoimmune conditions. Positive results hinted at autoimmune encephalitis triggered by the infection; further studies were inconclusive. Association of enteric fever with autoimmune encephalitis has not been reported. Three months later, presence of antinuclear antibodies (ANA) was rechecked- a negative report led to a retrospective diagnosis of transient ANA positivity in a nonautoimmune inammatory disease, the case in point being enteric fever.
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