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A reduction in malaria transmission intensity in Northern Ghana after 7 years of indoor residual spraying

Overview of attention for article published in Malaria Journal, August 2017
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  • Above-average Attention Score compared to outputs of the same age (59th percentile)

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93 Mendeley
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A reduction in malaria transmission intensity in Northern Ghana after 7 years of indoor residual spraying
Published in
Malaria Journal, August 2017
DOI 10.1186/s12936-017-1971-0
Pubmed ID

Sylvester Coleman, Samuel K. Dadzie, Aklilu Seyoum, Yemane Yihdego, Peter Mumba, Dereje Dengela, Philip Ricks, Kristen George, Christen Fornadel, Daniel Szumlas, Paul Psychas, Jacob Williams, Maxwell A. Appawu, Daniel A. Boakye


Indoor residual spraying (IRS) is being implemented as one of the malaria prevention methods in the Northern Region of Ghana. Changes in longevity, sporozoite and entomological inoculation rates (EIRs) of major malaria vectors were monitored to assess the impact of IRS in selected districts. Monthly human landing catches (HLCs) were used to collect mosquitoes from sentinel sites in three adjacent districts between July 2009 and December 2014: Savelugu Nanton (SND) where IRS had been implemented from 2008 to 2014; Tolon Kumbungu (TKD) where IRS had been implemented between 2008 and 2012 and Tamale Metropolis (TML) with no history of IRS. Mosquitoes were morphologically identified to species level and into sibling species, using PCR. Samples of Anopheles gambiae sensu lato (s.l.) were examined for parity and infectivity. EIR was calculated from biting and infectivity rates of malaria vectors. Parity rates of An. gambiae s.l. decreased significantly (p < 0.0001) in SND from 44.8% in 2011 to 28.1% by 2014, and in TKD from 53.3% in 2011 to 46.6% in 2012 (p = 0.001). However 2 years after IRS was discontinued in TKD, the proportion of parous An. gambiae s.l. increased significantly to 68.5% in 2014 (p < 0.0001). Parity rates in the unsprayed district remained high throughout the study period, ranging between 68.6% in 2011 and 72.3% in 2014. The sum of monthly EIRs post-IRS season (July-December) in SND ranged between 2.1 and 6.3 infective bites/person/season (ib/p/s) during the 3 years that the district was sprayed with alphacypermethrin. EIR in SND was reduced to undetectable levels when the insecticide was switched to pirimiphos methyl CS in 2013 and 2014. Two years after IRS was withdrawn from TKD the sum of monthly EIRs (July-December) increased by about fourfold from 41.8 ib/p/s in 2012 to 154.4 ib/p/s in 2014. The EIR in the control area, TML, ranged between 35 ib/p/s in 2009 to 104.71 ib/p/s by 2014. This study demonstrates that IRS application did have a significant impact on entomological indicators of malaria transmission in the IRS project districts of Northern Ghana. Transmission indicators increased following the withdrawal of IRS from Tolon Kumbungu District.

Twitter Demographics

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Mendeley readers

The data shown below were compiled from readership statistics for 93 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Unknown 93 100%

Demographic breakdown

Readers by professional status Count As %
Student > Master 24 26%
Student > Postgraduate 13 14%
Researcher 12 13%
Student > Ph. D. Student 11 12%
Student > Bachelor 8 9%
Other 6 6%
Unknown 19 20%
Readers by discipline Count As %
Medicine and Dentistry 18 19%
Agricultural and Biological Sciences 15 16%
Biochemistry, Genetics and Molecular Biology 12 13%
Nursing and Health Professions 12 13%
Social Sciences 3 3%
Other 12 13%
Unknown 21 23%

Attention Score in Context

This research output has an Altmetric Attention Score of 3. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 09 May 2018.
All research outputs
of 13,793,900 outputs
Outputs from Malaria Journal
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Outputs of similar age
of 267,768 outputs
Outputs of similar age from Malaria Journal
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Altmetric has tracked 13,793,900 research outputs across all sources so far. This one is in the 48th percentile – i.e., 48% of other outputs scored the same or lower than it.
So far Altmetric has tracked 3,992 research outputs from this source. They typically receive a little more attention than average, with a mean Attention Score of 5.6. This one is in the 47th percentile – i.e., 47% of its peers scored the same or lower than it.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 267,768 tracked outputs that were published within six weeks on either side of this one in any source. This one has gotten more attention than average, scoring higher than 59% of its contemporaries.
We're also able to compare this research output to 1 others from the same source and published within six weeks on either side of this one. This one has scored higher than all of them