Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:


Satellites monitoring dust storms linked to health risk


Medical researchers are using satellites to track massive dust storms blowing across Africa’s Sahel belt. The aim is to learn more about lethal meningitis epidemics that often follow in the dust’s wake.

"Meningitis outbreaks take place after a period without rain, low humidity and lots of dust in the air," explained Isabelle Jeanne of the Niger-based Centre de Recherche Médicale et Sanitaire (CERMES), associated with the international network des Instituts Pasteur and a partner in ESA’s Epidemio project. "The exact correlation is not yet known. But making use of satellite data enables us to follow week by week the development of the dust storms and the appearance of conditions favourable for an epidemic to start."

Meningitis is an inflammation of the brain and spinal cord lining known to cause seizures and deafness in those victims it does not kill outright. Meningococcal meningitis – caused by the meningococcus bacteria – is the only form of the disease to spread in epidemic form. Outbreaks occur throughout the world but are most common in the ’meningitis belt’ of semi-arid sub-Saharan territory known as the Sahel.

Meningitis mainly attacks children and young adults. The 18 nations of the Sahel have under-resourced healthcare systems: without treatment 70% of cases will perish, though with prompt anti-biotic therapy the death rate is reduced to one in ten.

Researchers want to study the hypothesis that the Sahel dry season – when wind-blown dust of talcum-powder-consistency can fill the arid air – makes the 300 million inhabitants of this region much more vulnerable to meningitis infection.

The source of infection is other people: up to a quarter of the people may be carrying the source of the meningocuccus bacteria without symptoms, spreading the infection through overcrowded living conditions by droplets from coughing or throat secretions. Normally meningococcus dwells harmlessly in the nose and throat – it is only when it gets into the bloodstream it becomes a potential killer.

"The dryness and dust does not spread the bacteria directly," Jeanne explained. "Instead it seems as though the irritation caused to local inhabitants’ mucus membranes renders them more vulnerable to bacterial infection. However an epidemic begins to decrease as soon as the first rain comes."

Therapeutic vaccination is a possibility, and drugs are available to lower morbidity levels. With supplies limited, it would be helpful to be able to anticipate the likeliest times and places of fresh outbreaks.

For this reason, during the last dry season, ESA has been supplying weekly dust maps of the Sahel as part of an early warning system. The maps are based on daily images from the Meteosat Visible and InfraRed Imager (MVIRI) aboard the ESA-built Meteosat-7 geostationary weather satellite.

"The dust maps have been very useful so far," Jeanne added. "There have been no meningitis outbreaks this year - fortunately for the inhabitants - so we cannot show a correlation as yet. The next planned step is to obtain archived images for the last ten years, to search for correlations against our records."

This activity is part of a wide-ranging ESA Data User Element project called Epidemio, developing Earth Observation (EO) services for epidemiologists.

Led for ESA by the company Jena-Optronik GmbH, with partners including the World Health Organisation (WHO), Epidemio is based on the principle that more detailed information on the environments within which infectious diseases occur can help epidemiologists study, understand and predict threats to human health.

Mariangela D’Acunto | alfa
Further information:

More articles from Health and Medicine:

nachricht Advanced analysis of brain structure shape may track progression to Alzheimer's disease
26.10.2016 | Massachusetts General Hospital

nachricht Indian roadside refuse fires produce toxic rainbow
26.10.2016 | Duke University

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Etching Microstructures with Lasers

Ultrafast lasers have introduced new possibilities in engraving ultrafine structures, and scientists are now also investigating how to use them to etch microstructures into thin glass. There are possible applications in analytics (lab on a chip) and especially in electronics and the consumer sector, where great interest has been shown.

This new method was born of a surprising phenomenon: irradiating glass in a particular way with an ultrafast laser has the effect of making the glass up to a...

Im Focus: Light-driven atomic rotations excite magnetic waves

Terahertz excitation of selected crystal vibrations leads to an effective magnetic field that drives coherent spin motion

Controlling functional properties by light is one of the grand goals in modern condensed matter physics and materials science. A new study now demonstrates how...

Im Focus: New 3-D wiring technique brings scalable quantum computers closer to reality

Researchers from the Institute for Quantum Computing (IQC) at the University of Waterloo led the development of a new extensible wiring technique capable of controlling superconducting quantum bits, representing a significant step towards to the realization of a scalable quantum computer.

"The quantum socket is a wiring method that uses three-dimensional wires based on spring-loaded pins to address individual qubits," said Jeremy Béjanin, a PhD...

Im Focus: Scientists develop a semiconductor nanocomposite material that moves in response to light

In a paper in Scientific Reports, a research team at Worcester Polytechnic Institute describes a novel light-activated phenomenon that could become the basis for applications as diverse as microscopic robotic grippers and more efficient solar cells.

A research team at Worcester Polytechnic Institute (WPI) has developed a revolutionary, light-activated semiconductor nanocomposite material that can be used...

Im Focus: Diamonds aren't forever: Sandia, Harvard team create first quantum computer bridge

By forcefully embedding two silicon atoms in a diamond matrix, Sandia researchers have demonstrated for the first time on a single chip all the components needed to create a quantum bridge to link quantum computers together.

"People have already built small quantum computers," says Sandia researcher Ryan Camacho. "Maybe the first useful one won't be a single giant quantum computer...

All Focus news of the innovation-report >>>



Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

Agricultural Trade Developments and Potentials in Central Asia and the South Caucasus

14.10.2016 | Event News

World Health Summit – Day Three: A Call to Action

12.10.2016 | Event News

Latest News

Greater Range and Longer Lifetime

26.10.2016 | Power and Electrical Engineering

VDI presents International Bionic Award of the Schauenburg Foundation

26.10.2016 | Awards Funding

3-D-printed magnets

26.10.2016 | Power and Electrical Engineering

More VideoLinks >>>