Gut cleanse, colon cleanse, detoxing. None of this is supported by science. Nor would any of these things cure, prevent or in anyway help a parasitic infection.
Here are some common parasitic infections and how they're treated. None of these treatments recommend gut cleanse. https://en.wikipedia.org/wiki/Giardia#Infection https://en.wikipedia.org/wiki/Toxoplasma_gondii#Treatment https://en.wikipedia.org/wiki/Ascariasis#Treatment https://en.wikipedia.org/wiki/Hookworm_infection#Treatment https://en.wikipedia.org/wiki/Pinworm_infection#Treatment
Gut inflammation can be a problem, but I would not recommend treating it or even diagnosing it without evidence.