Table 1 Definitions and values for basic input parameters
Symbol | Definition | Values | Source and justification |
|---|---|---|---|
a | Age of a mosquito in hours at the end of a given hour-long time interval | 1,2,3....720 | Defined here |
C h | Demographic coverage of humans with long-lasting insecticidal nets, expressed as the proportion of humans that use one each night | 0 or 0.8 | Complete absence or World Health Organization targets [39] |
d | Age of a mosquito in days, rounded down to whole days, at the end of a given hour-long time interval | 1,2,3....720 | Defined here |
Δ u | Probability of mosquito diverting away from attacking an encountered unprotected human host | 0.1 | |
Δ p | Probability of mosquito diverting away from attacking an encountered human host who is protected by using a long-lasting insecticidal net at that time | 0.6 or 0.8 | Stereotypical values for normal and behaviourally evasive vectors, respectively [14–16, 41] |
E max | Rate at which host-seeking mosquitoes encounter human hosts when fully active | 0.181 encounters · host seeking mosquito-1 · hour-1 | Derived [31] from field studies of wild An. arabiensis in Tanzania [42]. |
I t | Proportion of human population indoors and asleep where they can be protected by using long-lasting insecticidal nets | 0 to 1 | Assumed to vary over the course of each 24-hour day to reflect a stereotypical average of survey results from rural Africa [2] |
μ u | Probability of mosquito dying as a result of attacking an encountered unprotected human host | 0.1 | |
μ p | Probability of mosquito dying as a result of attacking an encountered human host who is protected by using a long-lasting insecticidal net at that time | 0.6 or 0.2 | Stereotypical values for normal and behaviourally evasive vectors, respectively [15, 16, 41] |
N h | Number of humans present contributing to the encounter rate described above | 1000 | |
P | Proportion of mosquitoes alive at the start of each hour that survive hazards other than host attack over the course of that hour | 0.995 | Derived from sensitivity analysis of daily values [26] |
S t | Suitability of a given hour-long time interval to the mosquito for host seeking, expressed as a proportion of their maximum host-seeking activity | 0 to 1 | Assumed to vary over the course of each 24-hour day to reflect one of three distinct stereotypical patterns of preferred feeding times |
t | An hour-long time interval during the 24-hour day starting at 18:00, corresponding to the intervals 18:00 to 19:00, 19:00 to 20:00 etc., through to 17:00 to 18:00. | 0,1,2,3…23 | [30] |