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From 2 farms near Peradeniya, Sri Lanka, 7 of 10 European cross-bred cows naturally infected with S. nasale were treated orally with praziquantel powder suspended in water at 20 mg/kg body weight; 3 were untreated controls. Lesion scores, and numbers of miracidia and eggs in 1 ml nasal secretion,...

Bont, J. de; Aken, D. van; Vercruysse, J.; Fransen, J.; Southgate, V. R.; Rollinson, D.
Journal of Veterinary Pharmacology and Therapeutics, 1989, 12, 4, pp 455-458