Nemo count in 11-12 wk old lambs

[hillman]

Just off phone to a friend and he did a fec count today and it came back at 1000 for nemotradius, these lambs have been dosed already for nemo and he is wondering wether they need so again , they are 11-12 weeks of age now ?
I’m genuinely unsure what to say , gut would be maybe do those that look under pressure

 

[Woolless]

I would undoubtedly be doing them with a white drench (assuming no strongyles).

 

[Johngee]

I would undoubtedly be doing them with a white drench (assuming no strongyles).

And all those eggs being shed means more larvae next year

 

[Six Dogs]

We have just done a FEC on some 8 weeks old lambs,looking good but very surprised to find counts of 500-800 mostly strongles

 

[unlacedgecko]

SCOPS issued a nemo warning for lambs that age today. Particularly upland farms.

Get them done!

 

[Skintagain]

Worm them. Been a weird spring.

 

[neilo]

Just off phone to a friend and he did a fec count today and it came back at 1000 for nemotradius, these lambs have been dosed already for nemo and he is wondering wether they need so again , they are 11-12 weeks of age now ?
I’m genuinely unsure what to say , gut would be maybe do those that look under pressure

I wormed a bunch of March born lambs a fortnight ago, and took a FEC sample out of interest (they were clearly ‘wormy’ and FEC is no real guide to nemo challenge). They had 1500epg, almost all of which were nemo!
They were a bunch that had previously been on fields that have only ever been grazed by dry ewes, then mobbed up on other grazing a couple of weeks ago. Presumably they were naive to nemo when they went to the pastures that had always been grazed with lambs, so couldn’t fight the big challenge?

A few have remained dirty, so have re-drenched with white drench yesterday. If the nemo are shedding big numbers of eggs then they are fair hooching with nemo worms I would think, who do damage before they are producing eggs.

 

[Skintagain]

I wormed a bunch of March born lambs a fortnight ago, and took a FEC sample out of interest (they were clearly ‘wormy’ and FEC is no real guide to nemo challenge). They had 1500epg, almost all of which were nemo!
They were a bunch that had previously been on fields that have only ever been grazed by dry ewes, then mobbed up on other grazing a couple of weeks ago. Presumably they were naive to nemo when they went to the pastures that had always been grazed with lambs, so couldn’t fight the big challenge?

A few have remained dirty, so have re-drenched with white drench yesterday. If the nemo are shedding big numbers of eggs then they are fair hooching with nemo worms I would think, who do damage before they are producing eggs.

Very similar to here.

 

[unlacedgecko]

 

[Global ovine]

Worm them again after no more than a month and do a drench efficacy test........collect 10 hot samples from different lambs between 7 and 10 days after worming for a FEC. This is very important as the on-farm nemo population (high 90% on the paddocks not being killed) may have developed resistance to the chemical family being used. You may be pouring more money into a problem you cannot fix with what you are using.
It doesn't take a very high nemo population in the gut to affect young lambs. 1000 for nemo is very high.

 

[JD-Kid]

I wormed a bunch of March born lambs a fortnight ago, and took a FEC sample out of interest (they were clearly ‘wormy’ and FEC is no real guide to nemo challenge). They had 1500epg, almost all of which were nemo!
They were a bunch that had previously been on fields that have only ever been grazed by dry ewes, then mobbed up on other grazing a couple of weeks ago. Presumably they were naive to nemo when they went to the pastures that had always been grazed with lambs, so couldn’t fight the big challenge?

A few have remained dirty, so have re-drenched with white drench yesterday. If the nemo are shedding big numbers of eggs then they are fair hooching with nemo worms I would think, who do damage before they are producing eggs.

2 weeks and getting a worm count would be. ringing some alarm bells

 

[Skintagain]

2 weeks and getting a worm count would be. ringing some alarm bells

Yes a cold spring where no serious challenge until the last fortnight from nemo

 

[JD-Kid]

Yes a cold spring where no serious challenge until the last fortnight from nemo

yea would be getting a lot of impact on lambs had a outbreak here 20 years ago no worm count but. lambs so full of them. started to fall over.
thing I'd be more worryed about is 2 weeks after drenching seeing a worm count would be showing a huge resistance to that drench family

 

[Skintagain]

yea would be getting a lot of impact on lambs had a outbreak here 20 years ago no worm count but. lambs so full of them. started to fall over.
thing I'd be more worryed about is 2 weeks after drenching seeing a worm count would be showing a huge resistance to that drench family

No persistency for nemo though??

 

[neilo]

2 weeks and getting a worm count would be. ringing some alarm bells

I did them with a clear drench last time, expecting there to be plenty of stronglye worms by now (biggest lambs were 50kg and obviously grazing well). I took a FEC sample as I did them, just as a check as to just how high they were.

Given the very high nemo count I used white this time, as they will have picked up more if the pasture was that contaminated, and likely have juveniles doing damage. I didn’t FEC this time as lack of eggs wouldn’t mean they were clear anyway.

 

[Aspiring Peasants]

2 weeks and getting a worm count would be. ringing some alarm bells

If it's nemo could this not be caused by a big hatch just after their first dose?

 

[Agrivator]

I did them with a clear drench last time, expecting there to be plenty of stronglye worms by now (biggest lambs were 50kg and obviously grazing well). I took a FEC sample as I did them, just as a check as to just how high they were.

Given the very high nemo count I used white this time, as they will have picked up more if the pasture was that contaminated, and likely have juveniles doing damage. I didn’t FEC this time as lack of eggs wouldn’t mean they were clear anyway.

Get some cattle - your own or summer grazers. Follow the basic principles of Clean Grazing and get on top of Nematodirus once and for all.

Dust off David Henderson's ''The Veterinary Book for Sheep Farmers'' pages 491 et seq. And forget about SCOPS; It's just about the most confusing and bewildering advisory publication ever devised. It was started by a veterinarian whose sole object was to try to discredit the whole concept of grazing management as a means of controlling intestinal and stomach worms in sheep and cattle.

 

[neilo]

Get some cattle - your own or summer grazers. Follow the basic principles of Clean Grazing and get on top of Nematodirus once and for all.

Dust off David Henderson's ''The Veterinary Book for Sheep Farmers'' pages 491 et seq. And forget about SCOPS; It's just about the most confusing and bewildering advisory publication ever devised. It was started by a veterinarian whose sole object was to try to discredit the whole concept of grazing management as a means of controlling intestinal and stomach worms in sheep and cattle.

Nah, you’re all right. I don’t need another hobby.

Moving from clean grazing is the reason this mob of lambs had a big challenge. Their slightly older flock mates were on ‘dirty’ grazing, had a challenge earlier, were cleared up with a cheap white drench, and have now developed a natural resistance to nemo.

 

[Agrivator]

Nah, you’re all right. I don’t need another hobby.

Moving from clean grazing is the reason this mob of lambs had a big challenge. Their slightly older flock mates were on ‘dirty’ grazing, had a challenge earlier, were cleared up with a cheap white drench, and have now developed a natural resistance to nemo.

So do you believe that at lambs on dirty grazing who succumb to Nematodirus only need a single drench and then become immune?

 

[neilo]

So do you believe that at lambs on dirty grazing who succumb to Nematodirus only need a single drench and then become immune?

That would depend on how dirty it is. But yes, lambs develop an immunity to nematodirus relatively quickly. Less so with other worm species, but they do develop a resistance in time, if they are challenged.

That’s the reason healthy adult ewes don’t require worming, and can be used to ‘clean’ pastures, although admittedly not as well as cattle.