Clinical observations on Ostertagiasis in yearling cattle

Authors: Wedderburn JF
Publication: New Zealand Veterinary Journal, Volume 20, Issue 4, pp 58-59, Apr 1972
Publisher: Taylor and Francis

Animal type: Cattle, Livestock, Production animal, Ruminant
Subject Terms: Animal remedies/veterinary medicines, Anthelmintics, Parasite control, Parasites - internal, Endocrine/autocrine/paracrine, Nematode, Reproduction, Reproduction - hormones, Treatment/therapy
Article class: Correspondence

---

Abstract: In the Journal of August 1970, the writer noted that ostertagiasis can be associated with severe scouring, wasting and death in adult cattle. Evidence was presented to show that the syndrome was associated with infection by large numbers of early fourth-stage larvae and that heifers were particularly susceptible about 2 weeks before calving. Indeed the rapid onset of recumbency in young “springing” heifers appeared to suggest a “shock” syndrome of some sort. Catchpole (1969) has reviewed data that showed highly significant increases in urinary oestrogen output, commencing suddenly from about the 123rd day of pregnancy in the ewe…

---