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Volume 21, Number 10—October 2015
Dispatch

Transmission Risk from Imported Plasmodium vivax Malaria in the China–Myanmar Border Region

Duoquan Wang1, Shengguo Li1, Zhibin Cheng1, Ning XiaoComments to Author , Chris Cotter, Jimee Hwang, Xishang Li, Shouqin Yin, Jiazhi Wang, Liang Bai, Zhi Zheng, and Sibao Wang
Author affiliations: Chinese Center for Disease Control and Prevention, Shanghai, China (D. Wang, N. Xiao); World Health Organization Collaborating Centre for Tropical Diseases, Shanghai (D. Wang, N. Xiao); National Center for International Research on Tropical Diseases, Shanghai (D. Wang, N. Xiao); Tengchong County Center for Disease Control and Prevention, Tengchong, China (S. Li, X. Li, S. Yin, J. Wang); Peking Union Medical College, Beijing, China (Z. Cheng, Z. Zheng); University of California, San Francisco, California, USA (C. Cotter, J. Hwang); Centers for Disease Control and Prevention, Atlanta, Georgia, USA (J. Hwang); Chinese Academy of Sciences, Shanghai (L. Bai, S. Wang)

Main Article

Table 2

Vectorial capacity of Anopheles sinensis mosquitoes in 3 villages in the China–Myanmar border region, May–September 2013*

Village Human landing rate† Human blood index‡ Mosquito biting habits§ Daily survival rate¶ Days of sporogonic development# pn** Survival, d†† Receptivity‡‡
Manduo 1.2 0.04 0.02 0.8 12.4 0.1 5.4 0.01
Luoping 4.9 0.04 0.02 0.8 14.0 0.09 5.7 0.05
Tuofeng
 2.0
0.03
 0.01
 0.9
 23.3
 0.04
 7.2
 0.01
Total 2.7 0.04 0.02 0.9 16.6 0.08 6.1 0.02

*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)).

Main Article

1These authors contributed equally to this article.

Page created: September 22, 2015
Page updated: September 22, 2015
Page reviewed: September 22, 2015
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.
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