Chemical composition of newborn larvae, muscle larvae and adult Trichinella spiralis |
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Authors: | M W Kilgore G L Stewart M Lou |
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Affiliation: | 1. Division of Biology and Medicine, Alpert Medical School, Brown University, Providence, RI 02903, USA;2. Center for Cancer Research and Development, Proteomics Core Facility, Rhode Island Hospital, Providence, RI 02903, USA;3. Biostatistics and Bioinformatics Division, Yenepoya Research Center, Yenepoya University, Mangalore 575018, India;4. Department of Pediatrics, Rhode Island Hospital, Brown University, Providence, RI 02903, USA;5. Department of Molecular Biology, Cell Biology, and Biochemistry, Brown University, Providence, RI 02903, USA |
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Abstract: | Chemical composition of newborn larvae, muscle larvae and adult Trichinella spiralis. International Journal for Parasitology16: 455–460. The chemical composition of newborn larvae (NBL), muscle larvae (ML) and 4-day-old and 7-day-old adult Trichinella spiralis were compared. Total protein constituted 44.1% of the dry wt of ML, 36.9% of NBL and 30.3% of 7-day-old adult worms. Glycogen content was 16.1% of worm dry wt in ML and 7.8% in NBL and 7.2% of worm dry wt in adults. Trehalose content was 5.2% in NBL, 8.3% in ML and 8.7% in 7-day-old adult worms. Significantly lower levels of trehalose and glycogen were found in 4-day-old worms than were present in 7-day-old worms. Free glucose amounted to 0.1% of dry wt in ML, 0.37% in NBL and 0.87% in 7-day-old adults. RNA accounted for 3.5% of the dry wt of ML, 3.2% of the dry wt of 7-day-old adults and 1.1% of the dry wt of NBL. The DNA content of NBL was 0.23% of worm dry wt, in ML 0.48% of worm dry wt and 0.51% of worm dry wt in 7-day-old adults. The three parasite stages examined agreed closely with regard to types of amino acids in the free pool. Exceptions were as follows: NBL lacked taurine which both adults and ML contained; adults lacked methionine which both ML and NBL contained; and, trace amounts of cysteine were present in ML but absent from the other two stages. |
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