1. A review of the biology and transmission ecology of African bovine species of the genusSchistosoma

   • N. Ø. Christensen
   • A. Mutani
   • F. Frandsen

   Review Article Pages: 551 - 570

2. Separation of amastigotes and trypomastigotes ofTrypanosoma cruzi from cultured cells

   • Técia Ulisses de Carvalho
   • Wanderley de Souza

   Original Investigations Pages: 571 - 575

3. The use of the 2 substituted 5-nitroimidazole, fexinidazole (Hoe 239) in the treatment of chronicT. brucei infections in mice

   • F. W. Jennings
   • G. M. Urquhart

   Original Investigations Pages: 577 - 581

4. A fine-structural comparison of the sporazoites ofGrellia (eucoccidium) dinophili inDinophilus gyrociliatus and ofIsospora felis in the mouse

   • M. Elwasila

   Original Investigations Pages: 583 - 589

5. Angeborene und erworbene Resistenz vonLymnaea stagnalis undRadix ovata gegen Miracidien-Invasion

   • Gisela Klühspies

   Original Investigations Pages: 591 - 611

6. Larval stages of digenetic trematodes ofMelanopsis praemorsa (L. 1758, Buccinum) (Thiaridae) snails from Yarmouk River, Jordan

   • Naim S. Ismail
   • Sami K. Abdel-Hafez

   Original Investigations Pages: 613 - 626

7. Histopathological study of the attrition of challenge cercariae ofSchistosoma mansoni in the skin of mice immunized by chronic infection and by use of highly X-irradiated cercariae

   • S. Y. Li Hsü
   • H. F. Hsü
   • S. M. Johnson

   Original Investigations Pages: 627 - 642

8. Schistosoma mansoni: Dose-related tegumental surface changes after in vivo treatment with praziquantel

   • M. K. Shaw
   • D. A. Erasmus

   Original Investigations Pages: 643 - 653

9. A SEM study of the cestodesTrilocularia acanthiaevulgaris, Phyllobothrium squali andGilquinia squali from the spiny dogfish

   • J. S. McCullough
   • I. Fairweather

   Original Investigations Pages: 655 - 665

10. Immunologic responses to experimental strongyloidiasis in rats

    • Robert M. Genta
    • Eric A. Ottesen
    • Franklin A. Neva

    Original Investigations Pages: 667 - 675

11. Studies on the Chemoprophylaxis of subperiodicBrugia malayi infection in the leaf monkey (Presbytis melalophos) with diethylcarbamazine citrate

    • J. W. Mak
    • P. K. C. Lim

    Original Investigations Pages: 677 - 680

12. Time courses of antibody levels inMastomys natalensis after infections withLitomosoides carinii, dipetalonema viteae, brugia malayi orB. pahangi, determined by ELISA

    • A. Tandon
    • H. Zahner
    • G. Reiner

    Original Investigations Pages: 681 - 692

13. Hammondia heydorni infection in camels (Camelus dromedarius) and water buffaloes (Bubalus bubalis) in Egypt

    • A. M. Nassar
    • M. Hilali
    • M. Rommel

    Short Communication Pages: 693 - 694