This is a bigger issue than most people realize and can lead to a host of "common" issues such as digestive upset, mood disorders, fatigue, memory loss, joint pain, insomnia, etc. Another major parasite that is contracted from house cats is toxoplasmosis. I think that even if people don't think they have a parasite they should still do a cleanse. The cleanses that I have done have been with herbal tinctures that included a mixture of black walnut, wormwood, and clove.