Human intestinal parasites are those that host themselves in the intestinal tract of the human body. According to the University of Maryland Medical Center, there are two types of intestinal parasites.
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Prostate specific antigen or PSA is a specific antigen produced by the prostate. Levels of this antigen are measured to determine the presence of disease. PSA can determine the presence of prostate cancer, benign prostatic hypertrophy and prostatitis.
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According to the Mayo Clinic, the average adult suffers from the common cold two to four times per year. The common cold is responsible for symptoms including runny noses, fever, fatigue and sneezing.
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Stomach acid, also referred to as gastric acid is a digestive liquid consisting of hydrochloric acid that is produced in the stomach. The contents of stomach acid work to digest food and kill harmful bacteria ingested into the system. Symptoms of excessive stomach acid may be similar to those of low stomach acid.
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