Image challenge in Veterinary Pathology

Image 1.

Red kangaroo (Macropus rufus), ovary (corpus luteum). Causative life stage?

A. Tachyzoite

Image 2.

Koala (Phascolarctos cinereus), skull. More common location of cranio-facial tumors?

A. Zygomatic arch and temporal bones

Image 3.

Virginia opossum (Didelphis virginiana), heart. Cause?

A. Trypanosoma

Image 4.

White-eared opossum (Didelphis albiventris), stomach. Cause?

A. Angiostrongylus cantonensis

Answers are provided in Veterinary Pathology 62(3): pages 408–410