Immunomagnetic SeparationMagneticsNeoplastic Cells, CirculatingImmunologic TechniquesBone Marrow PurgingMicrospheresCell SeparationPolymerase Chain ReactionFlow CytometryCryptosporidium parvumEscherichia coli O157LeukapheresisOocystsAntigens, CD34Sensitivity and SpecificityChymopapainFecesBone Marrow NeoplasmsFood MicrobiologyNeoplasm MicrometastasisPolyvinylsCryptosporidiumEvaluation Studies as TopicKeratin-8Magnetite NanoparticlesBlood Component RemovalHematopoietic Stem CellsBacteriological TechniquesAntibodies, MonoclonalKeratin-7Hepatitis A virusMicropore FiltersPolystyrenesParasitology