Mycobacteria in boreal coniferous forest soils

Iivanainen, Eila

doi:10.1016/s0168-6496(97)00040-8

Cited by 58 publications

(38 citation statements)

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“…To evaluate the association of pH with the numbers of mycobacteria and other heterotrophic bacteria, and with microbial respiration rate, the results from the present sediment study were combined with those from earlier studies of the soils of the same drainage areas (Iivanainen et al . 1997).…”

Section: Methodsmentioning

confidence: 99%

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Environmental factors affecting the occurrence of mycobacteria in brook sediments

Iivanainen

Martikainen

Väauml

et al. 1999

Journal of Applied Microbiology

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E. IIVANAINEN, P.J. MARTIKAINEN, P. VÄ Ä NÄ NE N A N D M .-L . K AT I LA . 1999. The occurrence of mycobacteria was studied in aerobic brook sediments from 39 drainage areas in Finland. The culturable counts of mycobacteria were related to climatic conditions, characteristics of the drainage area, chemical characteristics of the sediment and water, culturable counts of other heterotrophic bacteria, and microbial respiration rate in the sediment. The counts of mycobacteria varied from 1·1 × 10 2 to 1·5 × 10 4 cfu g −1 dry weight of sediment. They correlated positively with the proportion of the drainage area consisting of peatland, total content of C, content of Pb, microbial respiration rate in the sediment, and chemical oxygen demand of the water. The correlations of the mycobacterial counts with pH of sediment and alkalinity of water were negative. The results of the present sediment study and of the forest soil study published earlier strongly suggest that an increase in acidity increases the counts of mycobacteria and decreases the counts and activity of other heterotrophic bacteria. Mycobacterial counts were more than 100 times higher (per dry weight) in forest soils with pH 3·5-4·3 than in sediments with pH 4·5-6·3.

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Section: Methodsmentioning

confidence: 99%

“…1992). The numbers of mycobacteria were also large in the naturally acidic coniferous forest soils of the drainage areas (Iivanainen et al . 1997) and results of other studies suggest that low pH might favour the occurrence of mycobacteria in soil (Brooks et al .…”

mentioning

confidence: 99%

Environmental factors affecting the occurrence of mycobacteria in brook sediments

Iivanainen

Martikainen

Väauml

et al. 1999

Journal of Applied Microbiology

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“…In addition to water, soil is a habitat for NTM (Brooks et al. 1984; Iivanainen et al. 1997) and exposure to soil has been shown to be a risk factor for acquisition of M. avium disease (Reed et al.…”

Section: Habitats Of Environmental Mycobacteriamentioning

confidence: 99%

“…Numbers of rapidly and slowly growing NTM are relatively high in soils, particularly acidic, boreal forest soils and peats (Iivanainen et al. 1997), water draining from peat‐rich soils (Iivanainen et al.…”

Section: Transmission Of Mycobacteriamentioning

confidence: 99%

Surrounded by mycobacteria: nontuberculous mycobacteria in the human environment

Falkinham

2009

Journal of Applied Microbiology

470

359

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Summary A majority of the Mycobacterium species, called the nontuberculous mycobacteria (NTM), are natural inhabitants of natural waters, engineered water systems, and soils. As a consequence of their ubiquitous distribution, humans are surrounded by these opportunistic pathogens. A cardinal feature of mycobacterial cells is the presence of a hydrophobic, lipid‐rich outer membrane. The hydrophobicity of NTM is a major determinant of aerosolization, surface adherence, biofilm‐formation, and disinfectant‐ and antibiotic resistance. The NTM are oligotrophs, able to grow at low carbon levels [>50 μg assimilable organic carbon (AOC) l−1], making them effective competitors in low nutrient, and disinfected environments (drinking water). Biofilm formation and oligotrophy lead to survival, persistence, and growth in drinking water distribution systems. In addition to their role as human and animal pathogens, the widespread distribution of NTM in the environment, coupled with their ability to degrade and metabolize a variety of complex hydrocarbons including pollutants, suggests that NTM may be agents of nutrient cycling.

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“…Very high numbers of NTM are found in acidic, humic and fulvic acid-rich waters of southeastern United States coastal swamps (Kirschner et al 1992) and boreal, pine forest waters of northern Europe (Iivanainen et al 1997), Canada, and the United States. They are normal inhabitants of natural waters, engineered water distribution systems, drinking water, and household plumbing.…”

Section: Mycobacterial Habitatsmentioning

confidence: 99%

Detection of Pathogens in Water Using Micro and Nano-Technology

Zuccheri¹,

Asproulis²

2012

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Mycobacteria in boreal coniferous forest soils

Cited by 58 publications

References 0 publications

Environmental factors affecting the occurrence of mycobacteria in brook sediments

Environmental factors affecting the occurrence of mycobacteria in brook sediments

Surrounded by mycobacteria: nontuberculous mycobacteria in the human environment

Detection of Pathogens in Water Using Micro and Nano-Technology

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