What crime would be committed if an Offender inserted a parasite into a victim's ear? This would be involuntary and for malicious purposes. The outcome could range from short-term discomfort to severe life-long pain. Assume no medical treatments are possible.
I was thinking of Assault with a Dangerous Weapon, however a parasite is biological rather than a knife, acid, gun etc...
Jurisdiction: United Kingdom (England & Wales).