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Volume 19, Number 7—July 2013
Dispatch

Reducing Visceral Leishmaniasis by Insecticide Impregnation of Bed-Nets, Bangladesh

Dinesh MondalComments to Author , M. Mamun Huda, Mithun Kumar Karmoker, Debashis Ghosh, Greg Matlashewski, Shah Golam Nabi, and Axel Kroeger
Author affiliations: International Centre for Diarrhoeal Disease Research, Bangladesh, Dhaka, Bangladesh (D. Mondal, M.M. Huda, M.K. Karmoker, D. Ghosh); World Health Organization, Geneva, Switzerland (G. Matlashewski, A. Kroeger); Directorate General of Health Services of the Government of Bangladesh, Dhaka (S.G. Nabi); Liverpool School of Tropical Medicine, Liverpool, UK (A. Kroeger)

Main Article

Table 1

VL incidence and affected households before and after bed-net impregnation program, Bangladesh, 2006–2010*

Group Bed-net impregnation
Rate changes (p value) % Reduction† compared with control (p value)‡
Before, no. (%) affected After, no. (%) affected
HH§
Intervention, n = 2,512 40 (15.92) 3 (1.19) –14.73 (<0.0001) –70.52% (0.0007)
Control, n = 3,143 21 (6.68) 10 (3.18) –3.50 (0.0476)
Total, n = 5,655
61 (10.79)
13 (2.30)
–8.49 (<0.0001)

Population¶
Intervention, n = 11,426 43 (37.63) 3 (2.63) –35.01(<0.0001) –66.49% (0.001)
Control, n = 14,021 26 (18.54) 12 (8.56) –9.99 (0.023)
Total, n = 25,447 69 (27.12) 15 (5.89) –21.22 (<0.0001)

*VL, visceral leishmaniasis; HH, households.
†Effect of intervention: (B/A) – (D/C) Where A = baseline value for VL-affected HH per 1,000 HH/VL incidence per 10,000 persons in the intervention area; B = post-intervention value for VL-affected HH per 1,000 HH/VL incidence per 10,000 persons in the intervention area; C = baseline value for VL-affected HH per 1,000 HH/VL incidence per 10,000 persons in the control area; D = post-intervention value for VL-affected HH per 1,000 HHs/VL incidence per 10,000 persons in the control area. The effect is negative or positive if the VL-affected HH per 1,000 HHs/VL incidence per 10,000 persons is decreased or increased after intervention. Then the percentage reduction by intervention is calculated as (EI/[A]) × 100.
‡p values were calculated by Z statistic for pre- or post-rate differences between intervention and control areas.
§Incidence per 1,000 HH.
¶Incidence per 10,000 persons.

Main Article

Page created: June 18, 2013
Page updated: June 18, 2013
Page reviewed: June 18, 2013
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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