Answer to Case 688

 Answer to theParasite Case of the Week 688: Nit (egg) ofPediculus humanus capitis. As noted by Kosta Mumcuoglu, " it is the egg of the head louse,Pediculus humanus capitiswith the embryo inside (legs visible) and the operculum still on the egg. We can also see the part of the glue which was used to attach the egg on the hair. The aeropyles are in a row while in case of the pubic louse eggs they are in a triangular order. See but alsoCase 293 in Creepy Dreadful Wonderful Parasites. It is by the wayPthirusnotPhthirus pubis. " Kosta is correct on all counts. Here are some of the key identifying features. I find the detail of the embryo within the eggs to be particularly striking. The eggs ofP. h. capitisare typically glued onto the sheath of a hair, compared to the eggs ofP. h. humanus,which are glued onto clothing (and don ' t have a nit sheath). 
Source: Creepy Dreadful Wonderful Parasites - Category: Parasitology Source Type: blogs