How do they affect me?
Fleas can be carriers of disease or may transmit parasitic worms. Both cat and dog fleas are intermediate hosts of the dog tapeworm which can sometimes be transmitted to man.
Generally, in the UK fleas are not responsible for the transmission of disease.
However, they are still objectionable due to the bites they inflict. Fleabites are identified as a small dark red spot surrounded by a reddened area. The bite persists for one or two days and maybe intensely irritating.
Occasionally people become immune to fleabites.