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Grand Challenges is a family of initiatives fostering innovation to solve key global health and development problems. Each initiative is an experiment in the use of challenges to focus innovation on making an impact. Individual challenges address some of the same problems, but from differing perspectives.

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Combining Phages with CRISPR for Ecological Vaccination

Kevin EsveltPresident and Fellows of Harvard CollegeCambridge, Massachusetts, United States
Grand Challenges Explorations
Bacteriophage
1 Nov 2015

Kevin Esvelt of President and Fellows of Harvard College in the U.S. will use CRISPR technology to make protective healthy bacteria resistant to phage so they can outcompete pathogenic bacteria that cause childhood diarrhea and stunting. He will develop a method to make the protective Nissle 1917 strain of E. coli resistant to a range of phage, and use it to replace native E. coli strains in the guts of young mice as a model for human infants. This approach will provide long-term protection against pathogenic bacterial infections at low cost.

Disarming Type III Secretion System of Enteric Pathogens

Alessio FasanoMassachusetts General HospitalBoston, Massachusetts, United States
Grand Challenges Explorations
Bacteriophage
1 Nov 2015

Alessio Fasano of Massachusetts General Hospital in the U.S. will isolate bacteriophage (viruses that infect bacteria) that specifically kill pathogenic Escherichia coli and Shigella bacteria, which cause environmental enteropathy and other potentially deadly childhood diseases. They will perform a high-throughput screen using a diverse phage library to isolate phage that specifically target the type-III secretion system expressed by enteric pathogens like E. coli. They will also test an alternative approach by constructing phage to carry so-called CRISPR-Cas9 nucleases that they will engineer to target and cleave bacterial type-III secretion system genes. Results from both approaches will be tested for their capacity to selectively kill enteric pathogens and inhibit infection in a human organoid model, which consists of different cell layers to mimic the structure and function of the human gut.

Finance Application Tool

Ruth FosterTIWA, LLCScottsdale, Arizona, United States
Grand Challenges Explorations
Mobile Money
1 Nov 2015

Ruth Foster of TIWA, LLC in the U.S. will develop a finance application tool using money pictures to enable illiterate users to make accurate transactions. They will design and test a tablet with touch screen and build associated software for consumers that can be used to scan barcodes, or manually add products and prices. The final cost of the purchases will be automatically displayed using images of real money, which the consumer can then use to pay the correct amount.

Development of a Pan-Anti-Anopheles Livestock Vaccine

Brian FoyColorado State UniversityFort Collins, Colorado, United States
Grand Challenges Explorations
Malaria Transmission
1 Nov 2015

Brian Foy of Colorado State University in the U.S. will use antibodies that bind essential proteins in the mosquito Anopheles in order to block malaria transmission. They have already produced antibodies that bind conserved mosquito antigens such as the glutamate-gated chloride channel and used them to supplement blood meals, which was lethal to feeding mosquitoes. They will test whether cattle injected with these antigens produce the corresponding antibodies that are also lethal to the mosquitoes that feed off them.

BIOTOPE - Biomarkers to Diagnose Pneumonia

Joe GallagherUniversity College DublinDublin, Ireland
Grand Challenges Explorations
Pneumonia
1 Nov 2015

Joe Gallagher together with Chris Watson of University College Dublin in Ireland will develop a method to quickly and accurately diagnose bacterial pneumonia in children with acute respiratory infections so that the correct treatments can be given. Physical symptoms of bacterial pneumonia are similar to many other diseases including malaria but they require vastly different treatments. They will use a screening approach to identify protein, metabolite or miRNA biomarkers of bacterial pneumonia in blood and urine samples from 500 children in Malawi clinics with a known diagnosis of pneumonia. The most specific biomarker panel will be combined with a selected panel of symptoms such as heart and breathing rate to generate a highly sensitive clinical prediction model that specifically diagnoses bacterial pneumonia and can be used in low- to middle-income countries.

Phage Therapy in a Weaned Piglet Model of Enteropathy

Jason GillTexas A&M AgriLife ResearchCollege Station, Texas, United States
Grand Challenges Explorations
Bacteriophage
1 Nov 2015

Jason Gill of Texas A&M AgriLife Research in the U.S. will develop an animal model for environmental enteropathy, which is a chronic inflammatory condition of the gut prevalent in children from low-income countries, to test new bacteriophage-based treatments. Bacteriophage (phage) are viruses that infect and can kill bacteria, and can therefore be used to treat bacterial diseases. They will develop a chronic disease model by infecting weaned piglets with low doses of enterotoxigenic Escherichia coli, which is likely involved in environmental enteropathy development in humans. They will also search for a combination of different phage types that can infect and destroy this bacterial strain and effectively cure the disease in their animal model.

Smart Mobile Prepaid Debit Card

Jean-claude Gouesseecash expressBlaineville, Quebec, Canada
Grand Challenges Explorations
Mobile Money
1 Nov 2015

Jean-Claude Gouesse of Ecash Express in Canada will promote the use of mobile money in the Ivory Coast by establishing mobile money payment options for merchants to purchase supplies, and providing a free prepaid debit card for customers to pay for goods. When merchants can use mobile money to buy their own goods, they may also be more willing to receive mobile money payments from their own customers, particularly if they earn commission. They will build a user-friendly interface, and evaluate uptake by issuing 10,000 prepaid cards that can be loaded at participating retail stores, and providing 500 free, low-end Android devices to merchants for accepting payments.

Mobiles4All: New Users, New Insights, Better Data

Margaret McConnellMobiles4AllScottsdale, Arizona, United States
Grand Challenges Explorations
Financial Services Data
1 Nov 2015

Margaret McConnell of Harvard University and Mindy Hernandez of Mobiles4All (M4A) in the U.S. will generate rich datasets related to mobile phone use in Africa by providing mobile phones and incentives for users to share data. These datasets are of value to policymakers to promote the use of mobile money. They are collaborating with mobile network operator Vodacom Mozambique, behavioral scientists at Harvard University and developmental experts. They will run a pilot test, offering at-cost smart phones to 5,000 low-income customers in Mozambique, and evaluate the value of offering rewards in exchange for completing phone-based surveys. These surveys will be far quicker and simpler and cost less than traditional population-based surveys. They will combine the survey data with mobile network data, and package the results into a simple dashboard that can inform about mobile money use and how it might be enhanced.

Thermal Images of the Lung on a Smart Phone to Differentiate Bacterial from Non-bacterial Causes of Pneumonia

Patricia HibberdMassachusetts General HospitalBoston, Massachusetts, United States
Grand Challenges Explorations
Pneumonia
1 Nov 2015

Patricia Hibberd of Massachusetts General Hospital in the U.S. will develop a low-cost thermal imaging system for a smart phone to diagnose bacterial pneumonia in children from developing countries where the standard chest X-ray is often unavailable. They predict that children with pneumonia specifically caused by bacteria will have asymmetric “hot spots” of high temperatures in the lungs caused by localized inflammation. They will perform a proof-of-concept study in children under age 5 with chest infections in a large hospital in Malawi using the FLIR One Thermal Imaging System attached to a smartphone. At least 10 thermal images will be taken, and two short videos to record breathing rate, and the data will be used to develop statistical approaches for the required analytics. They will evaluate performance for diagnosing pneumonia by comparing it to the standard chest X-ray.

Exploring Mobile Money Transaction Data

Paula Hidalgo-SanchisPulse Lab Kampala - UN Global PulseKampala, Uganda
Grand Challenges Explorations
Financial Services Data
1 Nov 2015

Paula Hidalgo-Sanchis and team at Pulse Lab Kampala – UN Global Pulse in Uganda will develop software that can transform raw data on mobile money use in developing countries into user-friendly formats to inform policymakers and researchers to help expand the field. They will collect mobile money and call detail records from two collaborating network providers, while ensuring privacy of users. In parallel, they will collect complementary datasets such as household survey data to enrich the value of the financial services data. They will process the data to evaluate the relationship between mobile money usage and, for example, geographical location or local economic and environmental factors.

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