Immunomagnetic SeparationFlow CytometryCryptosporidium parvumOocystsEscherichia coli O157MagneticsFecesNeoplastic Cells, CirculatingPolyvinylsSensitivity and SpecificityCryptosporidiumParasitologyCell SeparationShiga Toxin 1Food MicrobiologyPolymerase Chain ReactionEvaluation Studies as TopicDyslipidemiasBacteriological TechniquesPolystyrenesCattleWaterWater MicrobiologyColony Count, MicrobialAntibodies, MonoclonalMilkCattle DiseasesEscherichia coli InfectionsDNA, BacterialAntibodies, BacterialCulture MediaMicrospheresRegional Blood FlowImage CytometryAntigens, CD34Blood Flow VelocityLeukapheresis