People in Stanford near Folkestone in Kent, have been sent letters telling them Asian tiger mosquito eggs had been discovered nearby.
Public Health England said no further evidence of the insect had been detected.
It said there was “currently no risk to public health in the UK”.
Jolyon Medlock, head of medical entomology at Public Health England (PHE), said: “We regularly monitor mosquito species and look for any which are new to the UK.
“Enhanced monitoring of the area was implemented and no further evidence of this mosquito has so far been found.
“As a precaution we advised the local authority to use insecticide as a means of control.”
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