As one adult louse lays 3-9 eggs per day
When dd had her first infestation (and it was the first time I had ever seen real lice) there were so many of the little bastards, I could not count them.
I noticed them when I was drying their hair - like little thunder flies. I put her back in the bath and washed her hair, put in loads of conditioner and combed through with the wide tooth comb. They were just falling out
.
I only had one of those useless plastic things to comb her, but we got them all out. They were all the same size (less than a week old). I have never seen so many all the same size since.
The one(s) that laid the eggs must have been on fertility drugs. (before they buggered off onto someone else
.
Every so often, a couple of big ones would appear, and every so often, I would miss them and have to comb all the eggs out.
DTD with a short bob and fringe used to get them most, so we grew out her hair like her sister's and they both wore a gelled pony tail with a hairband for years. The advantage of this was that when you take it out, if any eggs have been laid under the pony tail, they are no longer next to the head and become cold and fail to hatch. We used to have to comb every week.
As for shaming - we soon worked out where they came from, the whole class knew, the teacher knew, and anyone who knew the other members of the family knew where they came from. Perfectly middle class family who didn't think it mattered. This was all through primary school. They were supposed to deal with their own hair and sort out the lice with an electric comb themselves. Their parents didn't do their hair for them at all, so would never see the lice. except for the massive ones galloping over their heads having parties
I don't think sending the child home with a letter and bottle of lotion would have made it any worse, and may have stopped it earlier. She became an obsessive comber of her hair in high school.
It is really hard on the children with sensitivity/allergy/excema problems who cannot tolerate all the conditioner/combing/lotions