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Biology > Who's Who

Education

  • Ph.D. Iowa State University - Zoology, Parasitology and Medical Entomology - 1976
  • M.S. Iowa State University - Zoology with Parasitology - 1973
  • B.A. University of Northern Iowa - Biology - 1971

Courses

Student Advising

  • Pre-dentistry students
  • Pre-veterinary medicine students
  • Marine science student

Research - Parasitology

  • Ultrastructural studies on the structure of metacercarial cysts of trematode parasites in their second intermediate hosts
  • Ultrastructure of trematode parasites during their transformation from immature to adult stages
  • Parasite surveys of local animals
  • Selected Publications (undergraduates are indicated by *):
    Darwin's Parasite  

    Walker DJ* and DD Wittrock. (1999). Histochemistry and ultrastructure of the metacercarial cyst of Cryptogonimus chyli (Trematoda: Cryptogonimidae). Journal of the Helminthological Society of Washington 66: 82-86.

    Walker DJ* and DD Wittrock. (1992). Histochemistry and ultrastructure of the metacercarial cyst of Bolbogonotylus corkumi (Trematoda: Cryptogonimidae). Journal of Parasitology 78: 725-730.

    Wittrock DD, CS Bruce and A.D. Johnson. (1991). Histochemistry and ultrastructure of the metacercarial cysts of blackspot trematodes Uvulifer ambloplitis and Neascus pyriformis. Journal of Parasitology 77: 454-460.

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