Haemonchus larval stages develop a cuticle to afford some protection from dessication when outside the body.
They climb grass stems to increase their chances of being eaten quickly. When ingested, they shed the cuticle
and then grow to adulthood feeding on blood from the lining of the gut. The females shed fresh eggs into the
gut which pass out of the host's body in the faeces. These collections represent stages of larval development from climbing
the grass stem to shedding the cuticle which takes place inside the body. The coloured backgounds can be used to
represent the general colour scheme of the surrounding environment. Blue for water. pink for inside the body and
green for a leaf surface. Dark field is always a good standard. There is a fair amount of overlap, so take your pick.
The terminology is fairly simple:
Pre-exsheathment refers to the larval developmental stage before ingestion with the cuticle present.
Exsheathment is the process of shedding the cuticle.
Post-exsheathment refers to larvae present within the gut having shed the cuticle.
DIC stands for Differential Interference Contrast, a microscopic imaging technique.
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