Evidence map›Paper›PMID 28555071›Full record

ArticleScientific reports2017

Seasonally lagged effects of climatic factors on malaria incidence in South Africa.

Takayoshi Ikeda, Swadhin K Behera, Yushi Morioka, Noboru Minakawa, Masahiro Hashizume, Ataru Tsuzuki, Rajendra Maharaj, Philip Kruger

Open access · goldAbstract read
In one paragraph

Article in Scientific reports, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 34 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
34citing papers in PubMed, 4 pooled it
8.9field-weighted citation impact, top 2% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

34 citing papers in PubMed, 4 syntheses or guidelines pooled it, 77 citations in OpenAlex.

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  12. Host Preferences and Impact of Climate on Blood Feeding inTropical medicine and infectious disease · 2024
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors at 4 institutions in 2 countries.

Takayoshi IkedaJapan Agency for Marine-Earth Science and Technology, Yokohama Institute for Earth Sciences, 3173-25 Showa-machi, Kanazawa-ku, Yokohama, 236-0001, Japan. tak.ikeda@jamstec.go.jp.
Swadhin K BeheraJapan Agency for Marine-Earth Science and Technology, Yokohama Institute for Earth Sciences, 3173-25 Showa-machi, Kanazawa-ku, Yokohama, 236-0001, Japan.
Yushi MoriokaJapan Agency for Marine-Earth Science and Technology, Yokohama Institute for Earth Sciences, 3173-25 Showa-machi, Kanazawa-ku, Yokohama, 236-0001, Japan.
Noboru MinakawaNagasaki University, Institute of Tropical Medicine, 1-12-4 Sakamoto, Nagasaki, 852-8523, Japan.
Masahiro HashizumeNagasaki University, Institute of Tropical Medicine, 1-12-4 Sakamoto, Nagasaki, 852-8523, Japan.
Ataru TsuzukiNagasaki University, Institute of Tropical Medicine, 1-12-4 Sakamoto, Nagasaki, 852-8523, Japan.
Rajendra MaharajMalaria Research Programme, Medical Research Council, Ridge Road, Durban, 4067, South Africa.
Philip KrugerMalaria Control Programme, Limpopo Department of Health, Voortrekker Street, Tzaneen, Limpopo, 0850, South Africa.
Japan Agency for Marine-Earth Science and Technology · JPNagasaki University · JPSouth African Medical Research Council · ZAUniversity of Limpopo · ZA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Globally, malaria cases have drastically dropped in recent years. However, a high incidence of malaria remains in some sub-Saharan African countries. South Africa is mostly malaria-free, but northeastern provinces continue to experience seasonal outbreaks. Here we investigate the association between malaria incidence and spatio-temporal climate variations in Limpopo. First, dominant spatial patterns in malaria incidence anomalies were identified using self-organizing maps. Composite analysis found significant associations among incidence anomalies and climate patterns. A high incidence of malaria during the pre-peak season (Sep-Nov) was associated with the climate phenomenon La Niña and cool air temperatures over southern Africa. There was also high precipitation over neighbouring countries two to six months prior to malaria incidence. During the peak season (Dec-Feb), high incidence was associated with positive phase of Indian Ocean Subtropical Dipole. Warm temperatures and high precipitation in neighbouring countries were also observed two months prior to increased malaria incidence. This lagged association between regional climate and malaria incidence suggests that in areas at high risk for malaria, such as Limpopo, management plans should consider not only local climate patterns but those of neighbouring countries as well. These findings highlight the need to strengthen cross-border control of malaria to minimize its spread.

Indexed as

Disease OutbreaksHumansMalariaSeasonsSouth AfricaTemperature

Identifiers

PMID28555071
PMCPMC5447659
OpenAlexW2619715879

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.