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S. nasale was detected in 12.6% of 1393 cattle slaughtered in Kandy, Sri Lanka, between January and December 1987. The prevalence was significantly lower in March (3%) than in other months (10-17%). The prevalence of infection, number of lesions and severity of lesions increased with increasing age ...

Bont, J. de; Aken, D. van; Vercruysse, J.; Fransen, J.; Southgate, V. R.; Rollinson, D.
Parasitology, 1989, 98, 2, pp 197-202