“…Adenine (AMP+ADP+ATP) and guanine (GMP+GDP+GTP) nucleotide levels in the fluke F. hepatica were 3.07 ± 0.50 and 0.68 ± 0.18 (μmol/g fresh weight ±SD), respectively, while those in the tapeworm Moniezia expansa were 1.72 ± 0.41 and 0.34 ± 0.10, respectively. 40 The importance of purine metabolism in parasitic flatworm sexual maturation was indicated in the fluke Schistosoma japonicum . 41 The growth, development, and reproduction of schistosomes are known to be retarded in immunodeficient mammalian hosts, resulting in decreased egg-laying.…”