Help on Woodworm

Hi I have just discoverd wood worm infestation under the stairs and under a carpet with some dead parents around. What would be the correct manner to remove these parasitesnow and prevent a return Any help most appreciated
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file
Upload is a website for homeowners and building and maintenance pros. It is not affiliated with any of the manufacturers or service providers discussed here. All logos and trade names are the property of their respective owners.