This Petri Dish contains 3 mini microbes makes a great teaching tool represents Pediculous Humanus Capitis (Head lice) can be used to represent its relative Pediculous Humanus Humanus (Body Lice/Louse) a common shared infection. Includes a booklet on SSIs The critters represented by these models can be seen attached to the bodies hair and when hair is combed for examination. Care should be taken when using these models in a educational / teaching setting not to misrepresent the critters as being as large as the models.