Yes - parasite infections can cause severe body odor. This is because when the liver - the primary purifying organ of the body - is overloaded with toxins - the skin - the largest purifying organ of the body - will take the load off of the liver and will remove toxins too. Toxins are just that - toxic - and they will cause skin problems such as rashes, itching, acne and so forth. They will also cause odor. The same toxins that cause the stool to be very foul will cause the skin to smell too. Toxins can come out in every bodily fluid - urine, sweat, tears, phelm and menses.