Volume 21, Number 10—October 2015
Transmission Risk from Imported Plasmodium vivax Malaria in the China–Myanmar Border Region
|Village||Human landing rate†||Human blood index‡||Mosquito biting habits§||Daily survival rate¶||Days of sporogonic development#||pn**||Survival, d††||Receptivity‡‡|
*Vectorial capacity, expected number of new human infections from 1 infected person within 1 day, assuming all mosquitoes with sporozoites are potentially infective. HBI, human blood index (proportion of tested mosquitoes having ingested human blood.
†Average number of mosquitoes landing on a single person per night (ma).
‡Proportion of tested mosquitoes having ingested human blood.
§Human blood index divided by days needed to complete gonotrophic cycle (cycle of taking a blood meal and laying eggs).
¶Probability (p) of a mosquito surviving 1 whole day.
#Time (n) needed for parasites to complete development from ingested gametocytes during blood meal to sporozoites in salivary glands, when parasites are transmissible to humans.
** Fraction of infected mosquitoes after duration of sporogony.
††Duration of vector's life, in days, after surviving the extrinsic incubation period, calculated as the negative logarithmic reciprocal of the daily survival rate: 1/–ln(p).
‡‡Expressed by the vectorial capacity index: ma2(pn/–ln(p)).
1These authors contributed equally to this article.