http://eggzamin.com/for-the-owner/parasite-life-cycle/ This is a short but well explained article specifically on L3 LARVAE which is why I continue to take my meds on a regular basis. Now if these L3 LARVAE are on there own time frame in a protective shell where they don't eat until they molt into a newly egg laying monster Adult this would explain reinfection after you clear a strongyles test. I KNOW THIS BY READING NUMEROUS ARTICLES ON STRONGYLES, that I still have L3 larvae in my body that mature into newly infective adults. This would explain that if I stop medicating, newly formed adult laying females will emerge from the encysted L3 LARVAE. BY continuing my protocol I will ensure that these newly formed adults first meal will be ivermectin, albendazole or fenben. VET FRIEND says up to 2 years these L3 LARVAE CAN hibernate.