Large roundworm from egg to worm....

[Sue Gremlin]

And this would be why you need a second round of wormer? because these eggs would be at the infective stage at this point and end up in the chicken? so you want to kill them before they lay eggs to break the cycle?

do the infective bits (eggs after several moults) that dont make it into a chicken die off? what's the time span on that?

I was speaking more of the larvae that are currently inside the chicken. The second dose would clean up any larvae hiding in the intestinal lining. Re-infection with environmental larvae is a whole different subject. The infective (L3) larvae are snugly and safely encased in the eggshell and can persist for a long time in the environment. Weeks or months, depending on the conditions.

 

[ackie]

I was speaking more of the larvae that are currently inside the chicken. The second dose would clean up any larvae hiding in the intestinal lining. Re-infection with environmental larvae is a whole different subject. The infective (L3) larvae are snugly and safely encased in the eggshell and can persist for a long time in the environment. Weeks or months, depending on the conditions.

what do you do about environmental larvae

 

[Kiki]

what do you do about environmental larvae

There isn't much more you can so than cleaning it daily.

 

[JDGreene]

This is a super good question. Roundworms in chickens spend their whole lives inside the gut, so when you give a dewormer, all stages present are exposed to the drug, and are susceptible to it. This is not true for many other worm species, but it is for these guys. They do, however, sometimes bury themselves in the intestinal lining, so when the adults are purged, they come out, thinking the coast is clear.

Well that would explain why Safeguard can be given for 5 days in a row and not repeated and still work.