Guillain Barre is T-cell mediated destruction of myelinated axons. Generally presents with a rapid onset following a viral / bacterial illness with ascending paralysis.
i think this is vitamin B12 deficiency as it causes demyelination of spinocerebellar tract (ataxic gait),corticospinal tract(weakness),DC/ML(loss of vibration and propreoception)
Is this Guillain barre though? I felt it was Acute inflammatory demyelinating polyradiculopathy, discussed on page 512 FA 2019.
There is no relation to C jejuni here nor does the patient have any other relations to infection such as eating something or etc.