@article {3672,
	title = {BRIEF COMMUNICATION: Behaviour and physiology of lambs with gastrointestinal nematode parasitism},
	journal = {New Zealand Journal of Animal Science and Production},
	volume = {82},
	year = {2022},
	month = {01/2022},
	pages = {104-107},
	address = {Online},
	abstract = {The behaviour and physiology of lambs with gastrointestinal nematode infections (GIN) was evaluated. Thirty 8-month-old Romney wethers were assigned to one of two treatments (n=15/treatment) trickle dosed with either 1500 infective third stage larvae 3 days/week for 6 weeks (27,000 total L3; challenged), or water 3 days/week for 6 weeks (control). Blood and faecal samples were collected weekly during the study. Lipidomics were performed on plasma samples. Behaviour was observed from video-camera recordings once weekly over the study. At treatment week 4, specific triglycerides were elevated in the challenged lambs compared to controls (P<=0.05). Faecal egg counts were higher in challenged than control lambs from treatment week 4 (154 epg; P<=0.001). Challenged lambs had higher standing bouts at week 4 than baseline (5.6 bouts) whereas there were no differences in standing bouts for control lambs between baseline and week 4. Triglycerides and standing behaviour show promise for early identification of GIN.},
	issn = {1176-5283},
	author = {Hempstead MN and Waghorn TS and Gibson MJ and Sauermann CW and Ross AB and Cave VM and Sutherland MA and Sutherland IA}
}
@conference {41319,
	title = {Ammonia and urea utilisation in lambs infected with Trichostrongylus colubriformis and fed fresh lucerne (Medicago sativa)},
	booktitle = {Proceedings of the New Zealand Society of Animal Production},
	volume = {62},
	year = {2002},
	month = {Jan},
	pages = {77-80},
	publisher = {New Zealand Society of Animal Production},
	organization = {New Zealand Society of Animal Production},
	address = {Palmerston North},
	abstract = {The effect of a Trichostrongylus colubriformis infections on ammonia and urea fluxes across the mesenteric-drained viscera (MDV), portal-drained viscera (PDV), and liver was investigated using an arterio-venous preparation in lambs fed fresh lucerne (Medicago sativa). The lambs were infected with 6000 T. colubriformis L3 larvae per day for 6 days (n=5) or kept as parasite free controls (n=5). On day 48 of the experiment, the lambs were infused continuously for 8 hours with r-aminohippuric acid (688 mg/h) into the mesenteric vein in order to measure plasma flow across the MDV, PDV and liver. Blood was continuously collected from the mesenteric artery and vena cava for consecutive two hour periods throughout the infusion period and plasma was harvested. Plasma concentrations of ammonia and urea were unaffected by the presence of intestinal parasites. Ammonia fluxes across the MDV, PDV, and liver were similar between treatment groups. Urea fluxes were also similar between treatment groups with the exception of the PDV, which showed a net release of urea in the parasite group and a net uptake by the control group (P=0.03). This suggests that the presence of a sub-clinical T. colubriformis infection does not increase the demand on the lamb for amino acids for ureagenesis. },
	issn = {1176-5283},
	author = {Bermingham EN and Roy NC and Reynolds GW and Sinclair BR and Peters JS and Sutherland IA and Waghorn GC and Revell DK and McNabb WC}
}
