This study describes the development of a modified CsCl method that easily purifies T. gondii oocysts from feces of infected cats that are suitable for molecular biological and tissue culture manipulation
Staggs, S. E., See, M. J., Dubey, J. P., Villegas, E. N. Obtaining Highly Purified Toxoplasma gondii Oocysts by a Discontinuous Cesium Chloride Gradient. J. Vis. Exp. (33), e1420, doi:10.3791/1420 (2009).