Wen-Yuan, Chung: Purification of immunogenic cathepsins from Strongylus vulgaris excretory-secretory products (ESP) with potential for serodiagnosis of S. vulgaris infestations in the horse : 8. International Helminthological Symposium Helminths, Helminthoses and Environment, Košice, Slovak Republic, September 28 - October 1, 1999. Abstracts