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Abdominal condition and physiological age of female Anopheles gambiae caught resting out of doors, Riboque, São Tomé.
| Age class | ||||||
| Nulliparous | Parous | |||||
| Virgin | with plug | Stage II | Stage III | Sac | No-sac | |
| Unfed | 180 | 4 | 1 | 0 | 10 | 0 |
| Part fed | 59 | 33 | 10 | 2 | 8 | 6 |
| Engorged-semi-gravid | 27 | 30 | 12 | 82 | 14 | 209 |
