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Table 5 Vectorial capacity (VC) of Anopheles labranchiae in the rice fields of Principina (Grosseto, Italy), 2005-2006

From: Assessment of the risk of malaria re-introduction in the Maremma plain (Central Italy) using a multi-factorial approach

Parameters considered Potential transmission season
Mid June Mid July Mid August
  2005 2006 2005 2006 2005 2006
Average Temperature (°C) 25.1 23.6 26.4 26.5 23.7 23.0
Average Relative Humidity (%) 50 60 48 60 58 68
Length of gonotrophic cycle (n. days) 3.0 3.5 2.5 2.5 3.5 3.5
P. falciparum sporogonic cycle (n) Pf 11 15 12 12 15 16
P. vivax sporogonic cycle (n) Pv 10 12 9 9 12 13
Human Blood index (HBI)   0.016
Human biting rate (ma) 15 12 24 45 6 8
Parity rate % (P) 29.6 10.0 66.7 46.7 75.0 69.6
Vector daily survival probability (p) 0.666 0.518 0.85 0.74 0.92 0.696
Expectancy of infective life (n. days) (pn) Pf 0.0156 0.00005 0.1428 0.0258 0.291 0.190
Expectancy of infective life (n. days) (pn) Pv 0.0173 0.00037 0.2323 0.064 0.373 0.259
Expectancy of infective life (1/-log e p) 2.466 1.52 6.166 3.28 12.16 9.644
Longevity factor (pn/-log e p) Pf 0.0285 0.00008 0.8805 0.0845 3.5457 1.8356
Longevity factor (pn/-log e p) Pv 0.043 0.00057 1.432 0.211 4.537 2.505
VC P. falciparum 0.0023 0.0000043 0.135 0.0240 0.097 0.067
VC P. vivax 0.0034 0.000031 0.220 0.061 0.124 0.091