WRML.WormFaxNSW.2014-05-23. Breeding resistant sheep. CRC Awards. DPI’s champion athletes

To WormMail (WRML) list. WRML.2014-05-23.WormFaxNSW.2014-04-23.Breeding resistant sheep.CRC Awards.DPI’s champion athletes

WormFaxNSW – April 2014

WormFax is a monthly round-up of sheep WormTest results from two of the major labs in the state.

The latest edition – and explanatory notes – is online.


Don’t guess, WormTest. See http://www.wormboss.com.au/tests-tools/tests/checking-a-mob-of-sheep-for-worms.php

Once you have a WormTest result, see the Drench Decision Guide for your area. See http://www.wormboss.com.au/tests-tools/management-tools/drench-decision-guide.php

If/when you drench: do you know it was effective???: See http://www.wormboss.com.au/tests-tools/tests/checking-for-drench-resistance.php

The most expensive drench is the one that doesn’t work.

Breeding for resistance best insurance against worms


Excerpt: "According to Executive Officer of the WormBoss program, Dr Lewis Kahn, sheep breeders selecting better grown sheep are indirectly selecting for worm ‘resilience’ but this does not improve worm ‘resistance’ because they are separate traits.

“Resilient sheep are those that grow and perform well despite infection from parasitic worms, whereas resistant sheep have a lower level of worm infection because of a better immune response,” Dr Kahn said.

“Resilience is difficult to measure because it is the difference in production between worm-free sheep and when the same sheep are infected. It represents the cost of worm infection not the animal’s ability to resist infection." "

Practical profitable sheep programs win major awards


Excerpt: ‘The Cooperative Research Centre for Sheep Industry Innovation (Sheep CRC) has scooped the pool, winning two major research awards and being short-listed for a third at the 2014 CRC Association Awards last night.

The Sheep CRC received the CRC Program’s Star Award for high-level engagement with small and medium size businesses through its highly successful programs ‘Managing Scanned Ewes’, and the award for Excellence in Innovation for the ‘RamSelect’ initiative, both of which have resulted in dramatic uptake of new research and major improvements to industry productivity.’

And, regarding Managing Scanned Ewes and RamSelect, NSW DPI led the development of both, and were significant players in the delivery of them nationally.

Champion athletes – NSW DPI

Pasted below is a piece from MaxExpress, a DPI internal newsletter:

Triathletes Jess Richards (Orange) and Tracy Lamb (Cowra) are both in the Sheep Unit. (Greg is in Biosecurity).

Last year Jess, while in the final stages of her PhD, represented Australia at the Hawaiian Ironman in Kona.

The Sheep Unit has a number of other athletes as well (cyclists (e.g. Russell and Meckiff), runners, swimmers etc).

And also rugby players e.g. Gordon Refshauge of Cowra got a big write up in the Cowra newspaper recently for outstanding performances in rugby.





(Voted number one by parasitologists everywhere)

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WRML.WormfaxNSW-March.Liver fluke. worms and prime lamb production. targeted drenching in Vic.

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WRML.2014-05-02.WormfaxNSW-March.Liver fluke. worms and prime lamb production. targeted drenching in Vic. Embiggen your vocab

Back issues: www.wormmailinthecloud.wordpress.com


The latest is online.

http://www.dpi.nsw.gov.au/aboutus/resources/periodicals/newsletters/wormfax (Includes map and explanatory notes. Also see map at http://www.lls.nsw.gov.au/).

WormFax is a monthly summary of sheep WormTest results in NSW from two major labs, the NSW DPI State Vet lab at Menangle, and the Veterinary Health Research lab at Armidale.

Regular worm egg count monitoring (WormTests) is one of the pillars of best practice sheep worm control.

WormTest results around the traps were highly variable, which is often the case (between farms and between mobs on a farm).

Some of the higher WormTest average counts:

Armidale. Weaners. 3920 strongyle eggs per gram (epg). On larval differentiation (‘worm typing’): 81% Haemonchus (Hc; barber’s pole worm); 19% Trichostrongylus (Trich; black scour worm)

Northern New England: 1980 epg. 95% Hc

Central North: Wethers. 9400 epg. 100% Hc

Central West: Ewes. 2560 epg. No culture. ( A guess is required here: ‘Could be mostly Haemonchus, but there might be a fair few Trichostrongylus. What to treat with??. An extra $20-25 on larval differentiation might have been money well spent)

Tweed-Lismore: Weaners. 2596 epg (with individual counts up to 10,000). 77% Hc, 22% Trich.

Yass: Weaners. 1436 epg. 100% Hc

The two main reasons to drench:

* it’s a routine /regular drench (possibly pre-lambing and/or weaning) in a good (‘best practice’) program for your area: http://www.wormboss.com.au/programs.php

* evidence of the need to drench: usually/mostly WormTest results ( +/- visual signs suggesting worminess). Don’t guess, WormTest.

If you drench, this is highly recommended:

DrenchCheck. http://www.wormboss.com.au/tests-tools/tests/checking-for-drench-resistance.php

The most expensive drench is the one that doesn’t work.

Liver fluke

April-May is the most important fluke drench on ‘flukey’ properties. More info: https://wormmailinthecloud.wordpress.com/2014/04/09/wrml-its-april-nuke-the-fluke-prep-for-lambing/

Lifting the limits (on lamb production)

MLA have funded a study in south eastern Australia on how worms and drench resistance limit lamb production.

The project leader is Dr Lewis Kahn (UNE) and farms are located in four study regions (with different worm mixes / populations): In NSW, New England (researchers from UNE), Central Tablelands (Central Tablelands LLS), and South West Slopes (CSU Wagga Wagga), and in Victoria, Central Victoria (University of Melbourne).

An outline of preliminary results from the first year of the project was presented in MLA’s Feedback magazine, April 2014 issue (page 21).

Salient points, paraphrasing quotes from Lewis Kahn:

* very preliminary results but repeated across the four study regions, whether with barber’s pole worm dominating (New England) or ‘scour worms’* dominating (Victoria) (* Trichostrongylus/Teladorsagia spp)

* it remains to be seen if the results hold true across a number of years

* up to weaning at least, ewe worm control had a much greater effect on lamb body weight gains than lamb worm control

*lambs averaged >200 grams/day weight gain from marking to weaning and there was no significant difference between worm-suppressed lambs (simulating worm-free) and those which had no treatment to weaning.

Lewis also commented on slowing drench resistance. Things to do include:

* use effective chemicals in combination and rotation http://www.wormboss.com.au/tests-tools/management-tools/drench-mixtures-and-combinations.php

*in winter rainfall areas with hot dry summers (with very few worms in refugia over summer), leave some of the (adult) sheep untreated. Which sheep? Lewis said, ‘ (in the study) we found body condition score is significantly related to low worm count of ewes’. http://www.wormboss.com.au/news/articles/drench-resistance/use-refugia-to-prolong-drench-life.php

‘Strategic drenching on target’ – targeted drenching in south-west Victoria

An overview of an MLA-sponsored Producer Demonstration Site was presented in Feedback, April 2014 (page 23).

The article featured Victorian farmer and vet Dr Leo Cummins, who chairs the South West Prime Lamb Group, which ran the PDS on seven farms from 2010-2011 and 2012-2013. Technical input was from Dr Ian Carmichael, Veterinary Parasitologist, South Australian Research and Development Institute.

The concept tested basically was that, in that environment, not all ewes have to be drenched all the time provided average mob worm egg counts are carefully monitored.

A proportion of the flock in this study region can be left untreated, with the proportion depending on the worm egg count: the lower the average worm egg count, the lower the proportion of the mob that needs to be treated. Which sheep to drench: those in poorest condition, or scouring. (Keep in mind, this is a winter rainfall area with scour worms (Trichostrongylus/Teladorsagia) pre-dominating).

This meant more worm testing for Leo, but, in the 2 year period from December 2010, the number of drench doses under a targeted treatment approach was reduced from 900 doses (under traditional management) to 188 per 100 ewes.

Key recommendations from this south west Victorian PDS:

* The farm must already have an effective worm control program. Targeted treatment is not a program in its own right.

*Worm control strategies vary between regions. ( http://www.wormboss.com.au/programs.php )

* Targeted drenching is only recommended for adult ewes.

*Drenches must be tested and known to be at least 95% effective.

*All scouring and obviously poor animals are drenched before the required proportion of targeted animals is calculated (using a matrix based on WEC and BCS – see Feedback article).

* Drenching decisions should not be based on BCS alone.

* Each mob needs to be considered separately.

* Flock WECs should be done just before a scheduled drench.

Also see:


Embiggen your vocab

http://www.prdaily.com/Main/Articles/Embiggen_your_vocabulary_10_coinages_from_The_Simp_11150.aspx (courtesy of Kim Q).