Taenia solium DNA is present in the cerebrospinal fluid of neurocysticercosis patients and can be used for diagnosis.
Almeida CR, Ojopi EP, Nunes CM, Machado LR, Takayanagui OM, Livramento JA, Abraham R, Gattaz WF, Vaz AJ, Dias-Neto E. Eur Arch Psychiatry Clin Neurosci. 2006 Aug; 256(5):307-10. Epub 2006 Jul 10.