Table 6.
Penetration and movement across the mosquito midgut by Chandlerella quiscali microfilariae (MF) when ingested by co-indigenous, wild-caught mosquitoes
| Mosquito species | Type of feeding | MF ingested per mosquito (range) | MF penetrating midgut (range) | Prevalence of MF penetration (n) |
|---|---|---|---|---|
| Aedes vexans | Membrane-high density | 3211 (420–48,880) | 6 (1–176) | 42% (40) |
| Membrane-low density | 24 (1–350) | 2 (1–4) | 9% (34) | |
| Live bird | 16 (6–68) | 0 | 0% (14) | |
| Aedes dorsalis | Membrane-high density | 1073 (396–5205) | 65 (3–670) | 67% (12) |
| Membrane-low density | 52 (1–292) | 5 (1–113) | 43% (14) | |
| Live bird | 26 (3–88) | 1 (1–2) | 16% (25) | |
| Aedes fiavescens | Live bird | 70 (22–136) | 2 | 17% (6) |
| Aedes triseriatits | Membrane-high density | 1406 (607–4380) | 4 (1–7) | 50% (4) |
| Membrane-low density | 142 (48–375) | 1 | 17% (6) | |
| Culex tarsalis | Membrane-high density | 2060 (500–12,125) | 3 (1–9) | 15% (52) |
| Membrane-low density | 145 (1–432) | 1 (1–3) | 12% (33) | |
| Live bird | 21 (1–156) | 1 | 12% (40) |
Mosquitoes were either fed MF harvested from bird lungs, mixed with bird blood, and placed into prewarmed membrane feeders (=membrane) or were allowed to feed directly on anesthetized microfilaremic birds at night (=live bird).