Fasciolicides: efficacy, actions, resistance and its management.

Abstract

The modes of action of fasciolicides are described. Closantel and other salicylanilides interfere with energy metabolism by uncoupling oxidative phosphorylation in the fluke. Other fasciolicides are believed to have a metabolic action-halogenated phenols (via uncoupling) and clorsulon (via inhibition of glycolysis)-but direct evidence is lacking. Benzimidazoles (in particular, triclabendazole) bind to fluke tubulin and disrupt microtubule-based processes. Diamphenethide inhibits protein synthesis in the fluke. Other potential drug actions may contribute to overall drug efficacy. In particular, a number of fasciolicides-salicylanilides, phenols, diamphenethide-induce a rapid paralysis of the fluke, so their action may have a neuromuscular basis, although the actions remain ill-defined. Resistance to salicylanilides and triclabendazole has been detected in the field, although drug resistance does not appear to be a major problem yet. Strategies to minimize the development of resistance include the use of synergistic drug combinations, together with the design of integrated management programmes and the search for alternatives to drugs, in particular, vaccines.

• Authors: I Fairweather, J C Boray
• Journal: Veterinary journal (London, England : 1997) (Vet J) Vol. 158 Issue 2 Pg. 81-112 (Sep 1999) ISSN: 1090-0233 [Print] England
• PMID: 10489266 (Publication Type: Journal Article, Review)
• Copyright: Copyright 1999 Harcourt Publishers Ltd.

Chemical References

• Anthelmintics
• Benzimidazoles
• Salicylanilides
• Sulfanilamides
• Triclabendazole
• Nitroxinil
• clorsulon
• closantel
• Diamfenetide

Topics

• Animals
• Anthelmintics (pharmacology, standards, therapeutic use)
• Benzimidazoles (pharmacology, standards, therapeutic use)
• Diamfenetide (pharmacology, standards, therapeutic use)
• Drug Resistance
• Fasciola hepatica (drug effects, pathogenicity)
• Fascioliasis (drug therapy, veterinary)
• Microscopy, Electron (veterinary)
• Microscopy, Electron, Scanning (veterinary)
• Nitroxinil (pharmacology, standards, therapeutic use)
• Salicylanilides (pharmacology, standards, therapeutic use)
• Sulfanilamides (pharmacology, standards, therapeutic use)
• Triclabendazole