Journal of Helminthology

Research Papers

Dietary protein influences on regulation of Haemonchus Contortus populations in Dorsimal lambs

D.A. Israfa1 c1, M.J. Zainala1, M.A. Ben-Gheshira1, A. Rasedeea1, R.A. Sania1 and M.M. Noordina1

a1 Faculty of Veterinary Medicine and Animal Science, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia

Abstract

The influence of dietary protein supplementation upon resistance to haemonchosis was examined in Dorsimal (Polled Dorset × Malin) lambs offered two levels of protein. Lambs were offered either a complete basal ruminant diet (15% crude protein (CP)) or the same diet supplemented with fish meal as a source of rumen bypass protein (19% CP). Lambs from each dietary treatment group were given either a 7-week trickle infection with Haemonchus contortus infective larvae (L3) or remained uninfected. All lambs were drenched with anthelmintic at week 8 post-infection (PI), challenged with a single dose of 5000 H. contortus L3 one week later, and killed 14 days post-challenge (PC). Lambs on the supplemented diet that were trickle infected showed a significant reduction in egg output. Supplementation and previous infection did not affect either growth rate, worm burden, worm development or haematological parameters. There was a trend for enhanced growth among supplemented non-infected lambs in comparison to lambs which received the basal ration.

(Accepted March 04 1998)

Correspondence:

c1 Fax: 603 9430626 E-mail: daud@vet.upm.edu.my