www.photomacrography.net :: View topic - L3 stage larvae, worm-parasite of Roe Deer
www.photomacrography.net Forum Index
An online community dedicated to the practices of photomacrography, close-up and macro photography, and photomicrography.
Photomacrography Front Page Amateurmicrography Front Page
Old Forums/Galleries
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 
L3 stage larvae, worm-parasite of Roe Deer

 
Post new topic   Reply to topic    www.photomacrography.net Forum Index -> Administrator's Appreciation Gallery...Photography Through the Microscope
View previous topic :: View next topic  
Author Message
micro_pix



Joined: 11 May 2012
Posts: 66

PostPosted: Sun Sep 17, 2017 2:16 pm    Post subject: L3 stage larvae, worm-parasite of Roe Deer Reply with quote

This is the infective L3 larval stage of a worm-parasite of Roe Deer. The adult worms produce eggs in the gut of the deer which are then expelled in the droppings. The larvae hatch and feed on the organic matter in the droppings, going through stages one and two. They then enter the L3 stage and become "en-sheathed" - totally encased in a flexible membrane. You can see the membrane at the tail on the upper larvae and at the head end in the lower picture - also on the inside of bends where it is deformed.

They can no longer eat but they are still very mobile and move through the moisture in the grass. The larvae that are then eaten by the deer will enter the adult stage in the gut and start producing eggs.

There are many different genera of parasitic worms with very similar life cycles affecting ruminants, most are host specific but some are not.

As this came from Roe Deer droppings and the morphology fits I think it may well be Ostertagia spp. but if someone has a different idea please let me know.

The photo is a composite of two photos of the same worm, it's around 850 microns long.

Edit: i forgot to mention that the sheath protects them to some extent from dessication and temperature extremes while they wait to be eaten and is a good (but not infallible) way to differentiate parasitic worm larvae from free-swimming nematodes. The sheath is "dissolved" in the gut of the ruminant and that triggers the progression to the adult egg-laying stage.



Last edited by micro_pix on Tue Sep 19, 2017 3:32 am; edited 4 times in total
Back to top
View user's profile Send private message
carlos.uruguay



Joined: 23 Feb 2012
Posts: 4750
Location: Uruguay - Montevideo - America del Sur

PostPosted: Sun Sep 17, 2017 4:25 pm    Post subject: Reply with quote

Super!
Back to top
View user's profile Send private message Send e-mail Visit poster's website
Johann



Joined: 02 Aug 2016
Posts: 77
Location: South Africa

PostPosted: Sun Sep 17, 2017 11:35 pm    Post subject: Reply with quote

Very interesting and great images - thanks for sharing
_________________
My Facebook Page
My YouTube Channel
Back to top
View user's profile Send private message Visit poster's website
Marek Mis



Joined: 10 Jul 2010
Posts: 2442
Location: Suwalki, Poland

PostPosted: Mon Sep 18, 2017 3:42 am    Post subject: Reply with quote

Excellent and very aesthetic image !

Marek
Back to top
View user's profile Send private message Visit poster's website
Jacek



Joined: 02 Oct 2011
Posts: 4715
Location: Poland

PostPosted: Mon Sep 18, 2017 7:20 am    Post subject: Reply with quote

Super photo !
Back to top
View user's profile Send private message Send e-mail
sushidelic



Joined: 10 Jun 2016
Posts: 138

PostPosted: Tue Sep 19, 2017 3:11 am    Post subject: Reply with quote

Very informative and great photos!
Thanks, Michael
Back to top
View user's profile Send private message
hkv



Joined: 02 Jan 2013
Posts: 394
Location: Sweden

PostPosted: Tue Sep 19, 2017 6:48 am    Post subject: Reply with quote

Super! And disgusting...
_________________
https://www.flickr.com/photos/micromundus

https://www.instagram.com/hkkvarns

https://www.youtube.com/channel/UC0UdYNauY2BVHYH_litDZjA
Olympus BX51 | Olympus SZ4045 | Carl Zeiss Jena Sedival | Swift FM-31 | Reichert Neopan
Back to top
View user's profile Send private message Send e-mail
micro_pix



Joined: 11 May 2012
Posts: 66

PostPosted: Tue Sep 19, 2017 12:54 pm    Post subject: Reply with quote

Thanks for the kind comments.
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    www.photomacrography.net Forum Index -> Administrator's Appreciation Gallery...Photography Through the Microscope All times are GMT - 7 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group