Cand. biol. Loulou Peisl started her practice at the Programme Onchocercose laboratory in Ngaoundéré. She shall focus on the biology of Simulium damnosum s.l. larval populations at the local breeding site in the river Vina du Sud: What do these larvae feed, do they habour any parasites, which micht limit their survival and which parameters delimit the size of the larval population. i.e. the number of S. damnosum s.l. larvae that populate a specific breeding site.