I scratch my head and then check yours

I took my son in after scares of lice at his school, the lady checking my 2 year old sons hair decided it was a good idea to scratch her head with the comb she was using to check his hair, this goes beyond my understanding of what is good hygiene practise, if you work in an environment prone to treating lice and your head is itchy, surely you should not be scratching you head and then using the same comb to check a clients hair, stands to reason they are possibly trying to make more business by infecting them with lice from their own establishment (one treatment costs R950 to clear the lice). Disgusting to say the least. They gave him a certificate to say he didn't have lice and charged me R80 for the \privilege"of using such quality and \""hygienic\"" service"