Publications

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anthelmintic efficacy of five tropical native australian plants against haemonchus contortus and trichostrongylus colubriformis in experimentally infected goats (capra hircus).the study of the anthelmintic properties of plants rich in plant secondary metabolites can provide ecologically sound methods for the treatment of parasites on grazing animals. the purpose of the present study was to evaluate the anthelmintic effect of five tropical native australian plant species rich in plant secondary metabolites on adult haemonchus contortus and trichostrongylus colubriformis in experimentally infected goats. thirty young, nematode-free goats were infected with 2500 h. conto ...201222265804
no loss of production due to larval challenge in sheep given continuous anthelmintic treatment via a controlled release capsule.this study aimed to quantify production loss due to larval challenge in sheep administered a controlled release albendazole capsule (crc) and thus determine the suitability of crc treated sheep as a proxy for worm-free sheep in grazing experiments. the experiment used an incomplete 2+ù3 latin square design with 81 merino wethers. sheep were either infected (inf) with mixed oral infection of albendazole-susceptible haemonchus contortus, trichostrongylus colubriformis, and teladorsagia circumcinct ...201121824729
minimising the development of anthelmintic resistance, and optimising the use of the novel anthelmintic monepantel, for the sustainable control of nematode parasites in australian sheep grazing systems.to compare the risk of different treatment scenarios on selecting for anthelmintic resistance on australian sheep farms.201121495986
reduced efficacy of ivermectin, abamectin and moxidectin against field isolates of haemonchus contortus.to investigate the reduced efficacy of ivermectin, abamectin and moxidectin against two field isolates of haemonchus contortus. these isolates were identified on separate properties in the new england region of new south wales.200111837906
local eradication of haemonchus contortus using closantel. 19911755790
the incidence of thiabendazole resistance in field populations of haemonchus contortus on the northern tablelands of new south wales.a survey was undertaken to assess the incidence of thiabendazole resistance in field populations of h. contortus in sheep flocks on 40 farms distributed throughout the sheep grazing area of the northern tablelands of new south wales. treatment with thiabendazole at 66 mg/kg reduced h. contortus ova output by 96-100% in 18 flocks while in the remaining 22 there was a range of responses down to levels where the anthelmintic was without apparent effect. factors which may contribute to the high inci ...1979543833
availability of gastro-intestinal nematode larvae to sheep following winter contamination of pasture with six nematode species on the northern tablelands of new south wales.this experiment was designed to determine the infective consequences of winter pasture contamination by sheep infected with 6 species of trichostrongylid gastro-intestinal nematode (gin) at armidale in the new england region of nsw. ten helminthologically inert pasture plots were contaminated using 'donor' sheep harbouring artificial infections of haemonchus contortus, trichostrongylus colubriformis, trichostrongylus vitrinus, trichostrongylus axei, nematodirus spathiger and teladorsagia circumc ...200919070435
moxidectin-resistant haemonchus contortus in sheep in northern new south wales. 200315080459
factors affecting the prevalence and severity of footrot in a merino flock selected for resistance to haemonchus contortus.an outbreak of virulent footrot occurred in three lines of sheep selected for different levels of resistance to haemonchus contortus, providing an opportunity to examine the factors affecting footrot severity. the selection lines did not differ significantly in average footrot score, but various other factors were found to have an effect. in breeding ewes, the average score was 10.2 (maximum possible score 20) and the prevalence of footrot was 96%. there was a significant age effect, with averag ...19938257313
dietary protein for young grazing sheep: interactions with gastrointestinal parasitism.effects of protein supplementation and of nematode control on production responses in young grazing sheep and on nematode population dynamics were assessed. young merino wether sheep (n = 270) were allocated to one of three supplementation (su) treatments and one of three regimes of nematode control (drench, dr) in a factorial design. each of the nine treatments was replicated three times in a randomised complete block. animals received no supplement (su0) or were given supplements at a level eq ...19958747911
broad spectrum anthelmintic resistance of haemonchus contortus in northern nsw of australia.on a sheep farm in northern new south wales (nsw) of australia a degree of anthelmintic resistance was suspected. with noticeable clinical signs of infection and sheep not responding to treatment, a faecal egg count reduction test was conducted to ascertain the broad spectrum of anthelmintic resistance at this farm. a number of classes of anthelmintics were assessed including organophosphate, macrocyclic lactone (ml) and in combination an ml, benzimidazole, levamisole and salicylanilide. in addi ...201728579030
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