Recent research has also focused on coinfection of M. perstans and other filarial parasites. A study examining the epidemiology of Loa loa, Onchocerca volvulus, and M. perstans in the rain forest villages of Cameroon found a high prevalence of coinfection with O. voluvulus and M. perstans.[7] It also found a low prevalence of L. loa and O. voluvulus coinfection, as well as low prevalence of L. loa and M. perstans coinfection.[7] Coinfection also has singficant implications for treatment, because efficacious drugs for M. perstans are different from those for most filarial infections.