Dietary protein influences on regulation of Haemonchus contortus populations in Dorsimal lambs.
The influence of dietary protein supplementation upon resistance to haemonchosis was examined in Dorsimal (Polled Dorset x 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.
Faculty of Veterinary Medicine and Animal Science, Universiti Putra Malaysia, Selangor, Malaysia. daud@vet.upm.edu.my
D A
DA
Israf
M J
MJ
Zainal
M A
MA
Ben-Gheshir
A
A
Rasedee
R A
RA
Sani
M M
MM
Noordin
D000704:Analysis of Variance; D000821:Animal Feed; D000818:Animals; D004044:Dietary Proteins / Q000627:therapeutic use*; D006188:Haemonchiasis / Q000276:immunology*; D006189:Haemonchus; D007113:Immunity, Innate; D012756:Sheep; D012757:Sheep Diseases / Q000469:parasitology*
D004044:Dietary Proteins