1. Preface R. J. Martin

2. Simulating Dictoyocaulus viviparus infection in calves: the parasitic phase H. W. Ploeger and M. Eysker

3. Vaccine development and diagnostics of Dictoyocaulus viviparus J. B. McKeand

4. The immune response and the evaluation of acquired immunity against gastrointestinal nematodes in cattle: a review E. Claerebout and J. Vercruysse

5. Development of vaccines against gastrointestinal nematodes D. Knox

6. Immunological responses of sheep to Haemonchus contortus H. D. F. H. Schallig

7. Impact of nutrition on the pathophysiology of bovine trypanosomiasis P. H. Holmes, E. Katunguka-Rwakishaya, J. J. Benison, G. J. Wassink and J. J. Parkins

8. Electrophysiological investigation of anthelmintic resistance R. J. Martin

9. The development of anthelmintic resistance in sheep nematodes F. Jackson and R. L. Coop

10. Value of present diagnostic methods for gastrointestinal nematode infections in ruminants M. Eysker and H. W. Ploeger

11. Prospects for controlling animal parasitic nematodes by predacious micro fungi M. Larsen

12. Onchocerca ochengi infections in cattle as a model for human onchocerciasis: recent developments A. J. Trees, S. P. Graham, A. Renz, A. E. Bianco and V. Tanya.