Schistosomiasis

Schistosomiasis, also known as bilharzia, is a disease caused by parasitic flatworms called schistosomes. Schistosomiasis is a disease caused by parasitic worms, transmitted through contact with contaminated freshwater. It can cause a range of chronic health problems, including damage to internal organs. Efforts to combat the disease include improving sanitation, reducing exposure to contaminated water, snail control, and mass drug administration of praziquantel.

Causative Agents: The main species causing schistosomiasis are Schistosoma mansoni, Schistosoma haematobium, and Schistosoma japonicum. These species vary geographically and cause different forms of the disease. In Africa, the two most prevalent species are S. mansoni and S. haematobium  

Transmission and Lifecycle: Schistosomiasis is transmitted through contact with freshwater contaminated with the larvae of the parasite, released by freshwater snails. When people swim, bathe, or wade in the water, the larvae penetrate the skin and migrate through the body to the veins around the liver or bladder, where they mature into adult worms.

Symptoms and Health Impact: Initial infection may cause a rash or itchy skin. Chronic infection can lead to various symptoms depending on the species of worm. Schistosoma mansoni and S. japonicum primarily affect the intestine and liver, causing abdominal pain, diarrhea, and liver damage. S. haematobium primarily affects the urinary system, leading to urinary tract infections, and bladder cancer, and can cause blood in the urine.

Epidemiology: Schistosomiasis is most prevalent in tropical and subtropical areas, especially in poor communities without access to safe drinking water and adequate sanitation. It's estimated to affect millions of people worldwide.

Prevention and Control: Prevention strategies focus on reducing exposure to contaminated water, snail control, and improving sanitation and access to safe drinking water. Health education plays a critical role in prevention efforts.

Treatment: The primary treatment for schistosomiasis is praziquantel, a medication that is effective against all forms of the disease. Mass drug administration campaigns are often conducted in endemic areas to reduce the prevalence of the disease.

Global Health Initiatives: Schistosomiasis is recognized as a significant public health problem and is targeted by various global health initiatives. The World Health Organization (WHO) and other agencies aim to control and eventually eliminate the disease through integrated approaches, including treatment, improved sanitation, and snail control.

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Regionsort descending Location Program stage Years Portrait PDFs Landscape PDFs Data
Western Africa Cote d'Ivoire MDA/PC coverage (Geographic coverage - SAC) 2013 Download map png Download map pdf Download map png Download map pdf
Western Africa The Gambia MDA/PC coverage (Geographic coverage - SAC) 2017 Download map png Download map pdf Download map png Download map pdf
Western Africa Mauritania MDA/PC coverage (Geographic coverage - SAC) 2014 Download map png Download map pdf Download map png Download map pdf
Western Africa Niger Mapping Surveys (S. haematobium) Download map png Download map pdf
Western Africa Ghana Endemicity 2020 Download map png Download map pdf Download map png Download map pdf
Western Africa Togo MDA/PC coverage (Geographic coverage - SAC) 2015 Download map png Download map pdf Download map png Download map pdf
Western Africa Sierra Leone MDA/PC coverage (Therapeutic coverage - SAC) 2015 Download map png Download map pdf Download map png Download map pdf
Western Africa Guinea-Bissau MDA/PC coverage (Therapeutic coverage - Total population requiring treatment) 2015 Download map png Download map pdf Download map png Download map pdf
Western Africa Guinea MDA/PC coverage (Therapeutic coverage - Total population requiring treatment) 2017 Download map png Download map pdf Download map png Download map pdf
Western Africa Benin MDA/PC coverage (Therapeutic coverage - Total population requiring treatment) 2018 Download map png Download map pdf Download map png Download map pdf
Western Africa Senegal MDA/PC coverage (Therapeutic coverage - Total population requiring treatment) 2018 Download map png Download map pdf Download map png Download map pdf
Western Africa Cape Verde MDA/PC coverage (Geographic coverage - Total population requiring treatment) 2019 Download map png Download map pdf Download map png Download map pdf
Western Africa Guinea Endemicity 2019 Download map png Download map pdf Download map png Download map pdf
Western Africa Mauritania MDA/PC coverage (Geographic coverage - SAC) 2019 Download map png Download map pdf Download map png Download map pdf
Western Africa Liberia MDA/PC coverage (Therapeutic coverage - SAC) 2020 Download map png Download map pdf Download map png Download map pdf
Western Africa Nigeria MDA/PC coverage (Therapeutic coverage - Total population requiring treatment) 2020 Download map png Download map pdf Download map png Download map pdf
Western Africa Guinea MDA/PC coverage (Therapeutic coverage - Total population requiring treatment) 2019 Download map png Download map pdf Download map png Download map pdf
Western Africa Ghana MDA/PC coverage (Geographic coverage - Total population requiring treatment) 2021 Download map png Download map pdf Download map png Download map pdf
Western Africa Mauritania MDA/PC coverage (Therapeutic coverage - SAC) 2021 Download map png Download map pdf Download map png Download map pdf
Western Africa Ghana MDA/PC coverage (Therapeutic coverage - Total population requiring treatment) 2021 Download map png Download map pdf Download map png Download map pdf
Western Africa Benin MDA/PC coverage (Geographic coverage - SAC) 2022 Download map png Download map pdf Download map png Download map pdf
Western Africa Mali MDA/PC coverage (Therapeutic coverage - SAC) 2022 Download map png Download map pdf Download map png Download map pdf
Western Africa Cote d'Ivoire MDA/PC rounds (Therapeutic coverage - SAC) 2013 - 2015 Download map png Download map pdf Download map png Download map pdf
Western Africa Mauritania MDA/PC rounds (Therapeutic coverage - SAC) 2013 - 2019 Download map png Download map pdf Download map png Download map pdf
Western Africa Cape Verde Endemicity 2015 Download map png Download map pdf Download map png Download map pdf
Western Africa Niger Endemicity 2021 Download map png Download map pdf Download map png Download map pdf
Western Africa Togo MDA/PC rounds (Therapeutic coverage - Total population requiring treatment) 2013 - 2015 Download map png Download map pdf Download map png Download map pdf
Western Africa Burkina Faso MDA/PC rounds (Geographic coverage - SAC) 2013 - 2022 Download map png Download map pdf Download map png Download map pdf
Western Africa Ghana MDA/PC rounds (Therapeutic coverage - SAC) 2013 - 2022 Download map png Download map pdf Download map png Download map pdf
Western Africa Cape Verde MDA/PC rounds (Therapeutic coverage - Total population requiring treatment) 2013 - 2022 Download map png Download map pdf Download map png Download map pdf
Western Africa Togo MDA/PC rounds (Therapeutic coverage - Total population requiring treatment) 2013 - 2022 Download map png Download map pdf Download map png Download map pdf
Western Africa Sierra Leone MDA/PC coverage (Geographic coverage - Total population requiring treatment) 2014 Download map png Download map pdf Download map png Download map pdf
Western Africa Guinea-Bissau MDA/PC coverage (Therapeutic coverage - SAC) 2014 Download map png Download map pdf Download map png Download map pdf
Western Africa Nigeria Endemicity 2018 Download map png Download map pdf Download map png Download map pdf
Western Africa Cape Verde MDA/PC coverage (Geographic coverage - Total population requiring treatment) 2013 Download map png Download map pdf Download map png Download map pdf
Western Africa Burkina Faso MDA/PC coverage (Therapeutic coverage - SAC) 2013 Download map png Download map pdf Download map png Download map pdf
Western Africa Guinea-Bissau MDA/PC coverage (Geographic coverage - Total population requiring treatment) 2015 Download map png Download map pdf Download map png Download map pdf
Western Africa Burkina Faso Endemicity 2014 Download map png Download map pdf Download map png Download map pdf
Western Africa The Gambia Endemicity 2021 Download map png Download map pdf Download map png Download map pdf
Western Africa Cape Verde MDA/PC coverage (Geographic coverage - SAC) 2016 Download map png Download map pdf Download map png Download map pdf
Western Africa Benin MDA/PC coverage (Therapeutic coverage - SAC) 2017 Download map png Download map pdf Download map png Download map pdf
Western Africa Algeria MDA/PC coverage (Therapeutic coverage - Total population requiring treatment) 2015 Download map png Download map pdf Download map png Download map pdf
Western Africa Nigeria MDA/PC coverage (Therapeutic coverage - Total population requiring treatment) 2016 Download map png Download map pdf Download map png Download map pdf
Western Africa Senegal MDA/PC coverage (Geographic coverage - SAC) 2019 Download map png Download map pdf Download map png Download map pdf
Western Africa Cape Verde MDA/PC coverage (Geographic coverage - SAC) 2014 Download map png Download map pdf Download map png Download map pdf
Western Africa Liberia MDA/PC coverage (Geographic coverage - SAC) 2015 Download map png Download map pdf Download map png Download map pdf
Western Africa Liberia MDA/PC coverage (Therapeutic coverage - Total population requiring treatment) 2019 Download map png Download map pdf Download map png Download map pdf
Western Africa Senegal MDA/PC coverage (Therapeutic coverage - SAC) 2020 Download map png Download map pdf Download map png Download map pdf
Western Africa Guinea-Bissau MDA/PC coverage (Geographic coverage - Total population requiring treatment) 2019 Download map png Download map pdf Download map png Download map pdf
Western Africa The Gambia MDA/PC coverage (Therapeutic coverage - Total population requiring treatment) 2020 Download map png Download map pdf Download map png Download map pdf
Western Africa Togo MDA/PC coverage (Geographic coverage - SAC) 2021 Download map png Download map pdf Download map png Download map pdf
Western Africa Nigeria MDA/PC coverage (Geographic coverage - Total population requiring treatment) 2021 Download map png Download map pdf Download map png Download map pdf
Western Africa The Gambia MDA/PC coverage (Geographic coverage - SAC) 2021 Download map png Download map pdf Download map png Download map pdf
Western Africa Senegal MDA/PC coverage (Geographic coverage - Total population requiring treatment) 2022 Download map png Download map pdf Download map png Download map pdf
Western Africa Ghana MDA/PC rounds (Geographic coverage - SAC) 2013 - 2015 Download map png Download map pdf Download map png Download map pdf
Western Africa Cape Verde MDA/PC rounds (Therapeutic coverage - SAC) 2013 - 2019 Download map png Download map pdf Download map png Download map pdf
Western Africa Liberia MDA/PC rounds (Therapeutic coverage - Total population requiring treatment) 2013 - 2015 Download map png Download map pdf Download map png Download map pdf
Western Africa Guinea-Bissau Endemicity 2015 Download map png Download map pdf Download map png Download map pdf
Western Africa Sierra Leone Endemicity 2022 Download map png Download map pdf Download map png Download map pdf
Western Africa Nigeria MDA/PC rounds (Therapeutic coverage - Total population requiring treatment) 2013 - 2019 Download map png Download map pdf Download map png Download map pdf
Western Africa Mali MDA/PC rounds (Geographic coverage - Total population requiring treatment) 2013 - 2020 Download map png Download map pdf Download map png Download map pdf
Western Africa Nigeria MDA/PC rounds (Geographic coverage - Total population requiring treatment) 2013 - 2020 Download map png Download map pdf Download map png Download map pdf
Western Africa The Gambia MDA/PC rounds (Therapeutic coverage - SAC) 2013 - 2020 Download map png Download map pdf Download map png Download map pdf
Western Africa Mali MDA/PC rounds (Therapeutic coverage - SAC) 2013 - 2018 Download map png Download map pdf Download map png Download map pdf
Western Africa Algeria MDA/PC rounds (Therapeutic coverage - SAC) 2013 - 2020 Download map png Download map pdf Download map png Download map pdf
Western Africa Togo MDA/PC rounds (Geographic coverage - Total population requiring treatment) 2013 - 2021 Download map png Download map pdf Download map png Download map pdf
Western Africa Ghana MDA/PC rounds (Geographic coverage - SAC) 2013 - 2022 Download map png Download map pdf Download map png Download map pdf
Western Africa Cape Verde MDA/PC rounds (Geographic coverage - Total population requiring treatment) 2013 - 2022 Download map png Download map pdf Download map png Download map pdf
Western Africa Togo MDA/PC rounds (Geographic coverage - Total population requiring treatment) 2013 - 2022 Download map png Download map pdf Download map png Download map pdf
Western Africa Nigeria MDA/PC rounds (Therapeutic coverage - SAC) 2013 - 2022 Download map png Download map pdf Download map png Download map pdf
Western Africa Ghana MDA/PC coverage (Therapeutic coverage - SAC) 2018 Download map png Download map pdf Download map png Download map pdf
Western Africa Niger MDA/PC coverage (Therapeutic coverage - Total population requiring treatment) 2013 Download map png Download map pdf Download map png Download map pdf
Western Africa Guinea Endemicity 2017 Download map png Download map pdf Download map png Download map pdf
Western Africa Senegal MDA/PC coverage (Geographic coverage - Total population requiring treatment) 2018 Download map png Download map pdf Download map png Download map pdf
Western Africa Liberia Mapping Surveys (S. haematobium) Download map png Download map pdf
Western Africa Guinea-Bissau MDA/PC coverage (Geographic coverage - Total population requiring treatment) 2017 Download map png Download map pdf Download map png Download map pdf
Western Africa Sierra Leone Endemicity 2014 Download map png Download map pdf Download map png Download map pdf
Western Africa Guinea MDA/PC coverage (Therapeutic coverage - SAC) 2016 Download map png Download map pdf Download map png Download map pdf
Western Africa Guinea MDA/PC coverage (Geographic coverage - SAC) 2018 Download map png Download map pdf Download map png Download map pdf
Western Africa Senegal Endemicity 2013 Download map png Download map pdf Download map png Download map pdf
Western Africa Nigeria Endemicity 2021 Download map png Download map pdf Download map png Download map pdf
Western Africa Sierra Leone MDA/PC coverage (Geographic coverage - SAC) 2015 Download map png Download map pdf Download map png Download map pdf
Western Africa Cape Verde MDA/PC coverage (Therapeutic coverage - SAC) 2019 Download map png Download map pdf Download map png Download map pdf
Western Africa Algeria MDA/PC coverage (Therapeutic coverage - Total population requiring treatment) 2019 Download map png Download map pdf Download map png Download map pdf
Western Africa Ghana MDA/PC coverage (Geographic coverage - SAC) 2020 Download map png Download map pdf Download map png Download map pdf
Western Africa Burkina Faso MDA/PC coverage (Geographic coverage - SAC) 2021 Download map png Download map pdf Download map png Download map pdf
Western Africa Cape Verde MDA/PC coverage (Geographic coverage - Total population requiring treatment) 2021 Download map png Download map pdf Download map png Download map pdf
Western Africa Algeria MDA/PC coverage (Therapeutic coverage - SAC) 2021 Download map png Download map pdf Download map png Download map pdf
Western Africa Senegal MDA/PC coverage (Therapeutic coverage - Total population requiring treatment) 2022 Download map png Download map pdf Download map png Download map pdf
Western Africa The Gambia MDA/PC coverage (Therapeutic coverage - Total population requiring treatment) 2022 Download map png Download map pdf Download map png Download map pdf
Western Africa Guinea MDA/PC rounds (Geographic coverage - SAC) 2013 - 2018 Download map png Download map pdf Download map png Download map pdf
Western Africa Burkina Faso MDA/PC rounds (Geographic coverage - Total population requiring treatment) 2013 - 2015 Download map png Download map pdf Download map png Download map pdf
Western Africa Senegal MDA/PC rounds (Geographic coverage - Total population requiring treatment) 2013 - 2015 Download map png Download map pdf Download map png Download map pdf
Western Africa Burkina Faso MDA/PC rounds (Therapeutic coverage - Total population requiring treatment) 2013 - 2019 Download map png Download map pdf Download map png Download map pdf
Western Africa Burkina Faso MDA/PC coverage (Geographic coverage - Total population requiring treatment) 2014 Download map png Download map pdf Download map png Download map pdf
Western Africa Sierra Leone MDA/PC rounds (Therapeutic coverage - Total population requiring treatment) 2013 - 2015 Download map png Download map pdf Download map png Download map pdf
Western Africa Togo MDA/PC rounds (Geographic coverage - SAC) 2013 - 2020 Download map png Download map pdf Download map png Download map pdf
Western Africa Senegal MDA/PC rounds (Therapeutic coverage - Total population requiring treatment) 2013 - 2020 Download map png Download map pdf Download map png Download map pdf
Western Africa Guinea MDA/PC rounds (Therapeutic coverage - SAC) 2013 - 2019 Download map png Download map pdf Download map png Download map pdf
Western Africa Mauritania MDA/PC rounds (Geographic coverage - Total population requiring treatment) 2013 - 2021 Download map png Download map pdf Download map png Download map pdf

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