Abstract: The aim of these studies was to determine the reduction in pasture infectivity by the supplementation of grazing sheep with BioWorma®. Four placebo-controlled trials were conducted between 2009 and 2013 in sheep in different climatic regions of New South Wales and Queensland, Australia and across several seasons. The effectiveness of BioWorma was assessed by total worm counts in tracer sheep placed in paddocks grazed by parasitised sheep which were fed a daily supplement with and without BioWorma under group-feeding conditions. Impact of treatment was measured by assessing the worm burdens and weight gains of the parasitised sheep, as well as the number of anthelmintic (“salvage”) treatments required when faecal egg counts exceeded a threshold level.


  • The administration of BioWorma® reduced parasite larvae in tracer lambs by up to 84%
  • BioWorma® reduced pasture larval counts by an overall average of 68%
  • CSIRO has indicated that reductions above 50% would have a significant impact on the worm burden of a flock
Did you know: Trials with Duddingtonia flagrans have shown significant parasitic nematode reductions on pasture of grazing species like sheep, goats, cattle and horses
• Published Paper 2018 - Tracer studies in sheep

CSIRO - Collaboration partner of IAHP in the development of BioWorma® and Livamol® with BioWorma® and discoveror of D. Flagrans