My 12 & 8 y.o. DDs have got threadworms. Everyone in the family has taken Ovex and I'm going crazy with the washing of sheets and towels and vacuuming at the moment. I was alarmed to think that one of them could have picked it up when I thought we were being very vigilant about handwashing. Then I realised the last time we went through this was in February of this year. Could one of them have possibly been reinfected from eggs in the house? 7 months seems too long for anything to have survived but I don't think that they have been back in school long enough to have picked it up there. I should point out that my 12 y.o. sucks her thumb, which is probably how she picks up all sorts of nasties. She's got ASD and I believe it's a stim for her, so getting her to stop is challenging. Although, she is conscious about doing it in front of other people, so she only does it t home. So, I'm just not sure how they keep getting worms?!