Figure 3
The filaria in the vertebrate host. (A) Kinetics of the filarial recovery rate (recovered filariae × 100 / inoculated larvae) in three filaria-host pairs: Litomosoides sigmodontis (L. s.) in Meriones unguiculatus, L. sigmodontis in laboratory mice, Molinema dessetae (M. d.) in its natural host, Proechimys oris. (B) An infective larva (arrow) in a lymphatic vessel of the subcutaneous tissue (B. malayi-rodent) (in 43). (C) Two infective larvae migrating in a mesenteric lymphatic vessel to a lymph node (Monanema martini-rodent; larvae of this species are coiled up when migrating (in 38). (D) Lymphatic vessel with a larva and surrounded by an inflammatory reaction (inflammatory cells have infiltrated the valves of the vessel but not its lumen (in 43). (E) Adult filaria in a pulmonary blood vessel (M. martini rodent; in 38). Scales: the diameters of the infective larvae are 12–18 μm, in fixed tissues; that of M. martini adult male worm is 30 μm.