it is tempting to suggest that microfilariae were not able to survive; however, no attemp was made to adjust the number of microfilariae in the doxycycline group to match the number in the control group, so it is inappropriate to suggest that the fewer larvae recovered from the doxycycline-exposed mosquitoes compared with the control mosquitoes was due to a lower survival rate in this group. however, such an effect may be possible, as indicated that the fewer L. sigmodontis L3 collected from mites fed on doxycycline-treated rats was due to drug effects