What is high for spore concentrations? Mold Levels: allergenic or toxic mold: how much means a problem?

Related References

-------- A standarized EPA protocol for characterizing indoor air quality in large office buildings, by EPA, 2003 normal and typical Air- and dustborne mycoflora in houses free of water damage and fungal growth, by Horner, W. E., Worthan, A. G. and Morey, P. R., 2004 -------- Mould growth on wood at fluctuating humidity conditions, energy efficiency and energy conservation: policies, programmes and their effectiveness, by Viitanen, H. and Bjurman, J., 1995 -------- Static chamber method for evaluating the ability of indoor materials to support microbial growth, by Foarde, K. K., Vanosdell, D. W. and Chang, J. C. S., 1996 -------- Worldwide exposure standards for mold and bacteria, 5th Ed., by Brandys, C., Brandys, G. M., 2005