GSA Annual Meeting in Phoenix, Arizona, USA - 2019

Paper No. 8-12
Presentation Time: 11:10 AM


ROBINSON, Schuyler1, NELSON, Stephen1, HONDA, Jennifer2, BICKMORE, Barry R.3, AANDERUD, Zachary T.4 and JONES, Norman5, (1)Department of Geological Sciences, Brigham Young University, Provo, UT 84602, (2)Department of Biomedical Research, National Jewish Health, Denver, CO 80206, (3)Department of Geological Sciences, Brigham Young University, S389 ESC, Provo, UT 84602, (4)Department of Plant and Wildlife Sciences, Brigham Young University, 4125 LSB, Provo, UT 84602, (5)Department of Civil and Environmental Engineering, Brigham Young University, Provo, UT 84602

The opportunistic environmental microbes, non-tuberculous Mycobacterium (NTM), pose an increasing risk of disease and death in both immunodeficient and immunocompetent individuals in the USA and across the world. NTM lung disease is particularly prevalent in Hawaii, although the modes of NTM acquisition and transport in Hawaii are not fully understood. This study evaluated 149 soil and 50 water samples across the Hawaiian Islands to determine geochemical factors controlling NTM. Non-metric multidimensional scaling (NMDS) and principal component analyses (PCA) of modern soils show variables such as Total Organic Carbon (TOC), pH, P, mafic silicate minerals, and Pb seem to control NTM presence and transition metals and oxides such as TiO2, Zr, and Nb seem to control the absence perhaps due to toxicity. Logistic regression modeling coupled with Kolmogorov-Smirnov testing supported that TOC and P could be used to explain the probability of NTM presence in modern soils. Kolmogorov-Smirnov, non-metric multidimensional scaling, and principal components analysis results suggest poor predictability of NTM presence in soils when evaluating mineralogy alone. The same statistical methods indicated that transition metals appeared to control NTM presence in stream water and major cations and anions seemed to control NTM absence. However, additional bacterial stream data is needed to strengthen this finding.