[Intake of microfilariae by the vector for a periodic filarioid, Dipetalonema dessetae (author's transl)].

The Filariid D. dessetae in its natural host, Proechimys oris, has a daily periodic microfilaraemia with a conspicuous peak during the day (blood from the ocular sinus). --If the mosquitoes engorge during the daily peak, the density of microfilariae ingested is equal or slightly superior to the density of microfilaria in the blood from the ocular sinus. However, if they engorge during the night they ingest 2,5 times the number of microfilariae than the density of microfilariae in the ocular sinus indicates they should. Thus during the night there is a phenomenon of persistence of microfilariae in the cutaneous blood circulation of the rodent. --With mosquitoes of similar size each ingesting a similar volume of blood the distribution of Aedes as a function of the number of microfilariae ingested resembles the Poisson distribution. This indicates that the distribution of microfilariae which are accessible to the vector in the blood of Proechimys is nearly homogeneous.