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Other Applications of Medical Geology. Medical Geology-Range of Issue. Trace Element Exposure- As, Hg, F, Se, Zn, Al Dust- Asbestos, African, Valley Fever, Silicosis, CWP,VOG Radionuclides - Radon, Radium, Uranium Organics - VOCs, MTBE, PAHs, Antibiotics, Pesticides

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Other Applications of Medical Geology


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    Presentation Transcript
    1. Other Applications of Medical Geology

    2. Medical Geology-Range of Issue • Trace Element Exposure- As, Hg, F, Se, Zn, Al • Dust- Asbestos, African, Valley Fever, Silicosis, CWP,VOG • Radionuclides - Radon, Radium, Uranium • Organics - VOCs, MTBE, PAHs, Antibiotics, Pesticides • Microbes, Pathogens - West Nile Encephalitis, • LaCrosse Encephalitis, Plague, Hantavirus, • Rift Valley Fever, Lyme disease, etc. • Global Climate Change

    3. Other Medical Geology Issues • Volcanism • Organics (BEN) • Radioactivity • Pathogens and Microbes • Occupational Health • Nutrition

    4. Health effects of eruptive events • Lava flows • Pyroclastic flows

    5. The health effects of tephra dispersal

    6. Silicotic nodule in the lung tissue with disruption of surrounding alveoli Volcanic tephra dispersal • Mucous membrane irritation • Silicosis • Adsorbed toxins

    7. Calcium fluorosilicate (CaSiF6)

    8. The health effects of volcanic gas emissions

    9. Inert asphyxiants Carbon dioxide, CO2 Lake Nyos, Cameroon

    10. Irritant gases • Hydrofluoric acid, HF /hydrochloric acid, HCl • Mucosal irritation • Cutaneous burns • Respiratory disease • Sulphur dioxide, SO2 • Asthma • Acid rain

    11. Locating Mosquito Breeding Sites Use land characteristics, FEMA flood maps, and imagery to identify locations of potential Culiseta melanura habitat, but still accessible by roads or trails, where mosquito traps may be placed; determine risk to human health. Mosquito trap Mosquito trap

    12. Valley Fever: Geological/Ecological occurrence modeling geology geochemistry soils remote sensing interpretation elevation …. spatial datai Valley Fever favorableness

    13. Plague Cases in the SW United States #65 - Mixed Rangeland #82 - Desert Shrubland & Grassland #148 -Ponderosa Pine #184 -Pinyon Juniper

    14. Spread of West Nile Virus 1999-2002 (Avian Mortality)

    15. Medical Geology and Occupational Health • Hard Rock Mining • Coal Mining • Asbestos Mining and Processing • Ore Processing • Farming • Power Plant Workers

    16. Mseleni Joint Disease • Multiple epiphyseal displasia (long bones have malformed growth) • Polyarticular osteoarthritis (arthritis of several joints) • Protrusio acetabuli (hip disorder) • Dwarfism

    17. Disease Progression

    18. Prevalence • Onset unknown • Overall 39% women, 11% men • >19, 66% women, 25% men

    19. Prior Geochemical Research • Soils • Deficient: N, P, K, S, Ca, Zn, Cu, and B • Suspected: Mo • Not studied: F, I, V and Se

    20. Grey Fernwood Sand • Near neutral pHH2O 6.9 • < 4% clay (kaolinite and quartz) • Low organic C ~1.6% • CEC 2.0 cmolc kg-1