A patient on long-term antibiotics develops neurological symptoms including ataxia and confusion. Which mechanism explains why these symptoms arise following antibiotic use in this context?

💡 Explanation

Antibiotics disrupt the gut microbiome, which reduces the production of certain vitamins. This can lead to impaired thiamine synthesis by bacteria, which is essential for neuronal function; therefore, neurological symptoms arise, rather than increased iron absorption or altered production of vitamin K or folate.

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