Mugilidae ‫المرمريج‬ ‫وعائمة‬ Mastacembelidae ‫اع‬ ‫أنو‬ ‫أربعة‬ ‫شممت‬ ‫الطفيمية‬ ‫الديدان‬ ‫من‬ ‫اع‬ ‫أنو‬ ‫بسبعة‬ ‫أصابتها‬ ‫الشريطية‬ ‫الديدان‬ ‫من‬ Khawia armeniaca ‫و‬ Bothriocephalus acheilognathi. ‫و‬ Senga sp ‫و‬ Postgangesia inarmata ‫الخيطية‬ ‫الديدان‬ ‫من‬ ً ‫احدا‬ ‫و‬ ‫ونوعا‬ Procamallanus viviparous ‫من‬ ‫ونوعين‬ ‫أس‬ ‫الر‬ ‫شوكية‬ ‫الديدان‬ Neoechinorhynchus iraqensis ‫و‬ Neoechinorhynchus zabensis ‫أظهرت‬ ‫و‬ ‫هذه‬ ‫نتائج‬ ‫االجمالية‬ ‫االصابة‬ ‫نسبة‬ ‫أن‬ ‫اسة‬ ‫الدر‬ ‫ألسماك‬ ‫الخشني‬ Liza abu ‫االسيوي‬ ‫الجري‬ ‫و‬ Sliurus triostegus ‫بالدودة‬ N.iraqensis ‫كانت‬ %38.75 ‫و‬ %35.45 ‫ان‬ ‫حين‬ ‫في‬ ‫الي،‬ ‫التو‬ ‫عمى‬ ‫االصابة‬ ‫نسبة‬ ‫ألسماك‬ ‫الطوينة‬ Capoeta damascina ‫بالدودة‬ N.zabensis ‫كانت‬ %34.61 .

Present investigation includes the quantitative estimation of protein, carbohydrate, lipids and nucleic acids in fish intestinal helminthes, Khawia armeniaca, Bothriocephalus acheilognathi, Senga sp., Postgangesia inarmata, Procamallanus viviparous, Neoechinorhynchus iraqensis, and Neoechinorhynchus zabensis. In addition, these helminthes were characterized biochemically using electrophoretic isoenzyme patterns and genetically using a molecular approach. The results revealed that the protein and glycogen contents were low in parasites as compared to their hosts. In contrast,lipids were high in parasites as compared to their hosts.DNA was extracted from helminthes and used as template to amplify 5.8 S ribosomal DNA primers and analysis of PCR product revealed positive band of 450 pb in acanthocephalans. Isoenzyme electrophoresis revealed the presence of two bands for each hexokinase and malic enzyme in acanthocephalans and one band in cestodes whereas malate dehydrogenase was with two bands in cestodes and with one band in acanthocephalans.