Foul Brood:-  American foulbrood ( AFB ) and European foulbrood ( EFB )

 https://secure.fera.defra.gov.uk/beebase/public/beekeepingFaqs/europeanFoulbroodEfb.cfm

Varroa destructor:-  Varroa 

https://secure.fera.defra.gov.uk/beebase/public/beekeepingFaqs/varroa.cfm

Advisory Leaflets & Taining Manuals can be found at :-

 https://secure.fera.defra.gov.uk/beebase/index.cfm?pageId=167

Video:- Life Cycle of the Honeybee and Varroa Mite 

http://video.google.co.uk/videoplay?docid=-7304562435786960616