Bothriocephalus scorpii

Type 3 fermentation, characterised by a series of reactions between mitochondrial end-products that yield branched-chain fatty acids (e.g. 2-methylvalerate, 2-methylbutyrate), occurs in Ascaris, a number of other intestinal nematodes and in some trematodes (490). However, cestodes, with the exception of Bothriocephalus scorpii, which excretes methyl-butyrate (107), have not been shown to produce branched-chain fatty acids as end-products of respiratory metabolism. Some or all of the enzymes of the TCA cycle may be present in cestodes in addition to the type 1 and type 2 fermentation pathways. The extent to which the cycle may contribute to carbohydrate metabolism in cestodes is considered below. 

The amino acids occurring in a number of other adult and larval cestodes have been documented and recent data are available for Parionella spp., Skrjabinia spp., Raillietina spp. (77, 346), Bothriocephalus scorpii and Nybelinia spp. (977) Taenia hydatigena (636) Diphyllobothrium spp. (236,271,275) Amoebotaenia cuneata (78) Ligula intestinalis (164) E. granulosus (29) Gangesia spp. (587) Lytocestus indicus, Introvertus raipurensis and Lucknowia indica (598). Some earlier data have been provided by Smyth (796) and von Brand (911). 

Jones, A. (1975). The morphology of Bothriocephalus scorpii (Muller) (Pseudophyllidea, Bothriocephalidae) from littoral fishes in Britain. Journal of Helminthology, 49 251-61. 

Mackinnon, A. D. Featherston, D. W. (1982). Location and means of attachment of Bothriocephalus scorpii (Muller) (Cestoda Pseudophyllidea) in red cod, Pseudophycis bacchus (Forster in Bloch Schneider), from New Zealand waters. Australian Journal of Marine Freshwater Research, 33 595-8. 

Renaud, F., Gabrion, C. Pasteur, N. (1983). Le complexe Bothriocephalus scorpii (Mueller, 1776) differentiation par electrophorese enzymatique des especes parasites du Turbot (Psetta maxima) et de la barbue (Scophthalmus rhombus). Comptes Rendus des Seances de I Academie des Sciences, Ser. Ill, 296 127-9. 

Yarygina, G. V., Vykhrestyuk, N. P. Klochkova, V. I. (1982). [The amino acid composition of collagenous proteins of the trematodes Calicophoron erschowi, Eurytrema pancreaticum and the cestodes Bothriocephalus scorpii and Nybelinia sp. larvae.] In Russian. Zhumal Evolyutsionnoi Biokhimii i Fiziologii, 18 564-7. [HA/53/4639]... 

Eubothrium rugosum E. salvelini E. crassum E. acipenserinum Bothriocephalus gowkongensisP B. scorpii B. claviceps... 

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