- SUMMARY: In addition to a considerable reduction of milk yield and increasing occurences of health problems, behavioural abnormalities that have not yet been examined, have been observed over the last two years in a herd of dairy cows maintained in close proximity to a TV and Radio transmitting antenna. The evaluation of possible factors which could explain the abnormalities in the livestock did not disclose any factors other than the measurable high-frequency electromagnetic fields. An experiment in which a cow with abnormal behaviour was brought to a stable in a different area resulted in normalisation of the cow within five days. The symptoms returned, however, when the cow was brought back to the stable in close proximity to the antenna in question. In view of the previously known effects of electromagnetic fields it may be possible that the observed abnormalities are related to the electromagnetic field exposure.
- Table 1: Transmitting antennas in close proximity of the farm (all installed in the TV tower of Figure 1)
Transmitting Antenna Frequency Performance 39 directional radio transmitters 2.2 - 18.7 GHz 124 W (Mean) C-Net 461 MHz 34 W D-Net 935 MHz 25 W B-Net 60 MHz 20 W Cityruf 460 MHz 50 W Eurosignal 87,361 MHz 2 kW TV-Channel 2510 MHz 20 kW TV-Channel 3734 MHz 20 kW Modacom 427 MHz 15 kW
- Table 2: Measurements of the electromagnetic field output in the attic storey of the farm house
Attic Window Frequency Signal Leval (dBm) Leval (dBm) Power Denisty
closed 512.2 TV-2 -12.8 0.044 closed 464.2 C-Network -43 0.00003 closed 936.2 D-Network -46.8 0.000051 closed 735.7 TV-3 -15.8 0.04 open 511.4 TV-2 -13.2 0.035 open 735.7 TV-3 -7.6 0.26
|Measurement||Location||Frequency (MHz)||Level (dBm)||Power density
|In the stable||Entrance (10)||512||-9.6||0.08|
|In the stable||Middle Part||512||-24||0.003|
|In the stable||Rear Part||512||-26||0.002|
|In front of stable||D||512||-3.8||0.36|
|Beside the stable||E||512||-22.4||0.004|
|Beside the stable||G||512||-2||0.46|
|Beside the stable||H||512||-13.4||0.03|
|Inside the house||735.7||-15.8||0.04|
|In front of the house||5||88.8||-4.8||0.006|
- 1. ADEY. W. R.: Biological effects of electromagnetic fields. J. Cell. Biochem. 51. 410-416 (1993).
- 2. ALGERS, B. and K. HENNICHS: The effects of exposure to 400 kV transmission lines on the fertility of cows. A retrospective cohort study. Prev. Vet. Med. 3,352-361 (1986 a).
- 3. ALGERS. B. and J. HULTGREN: Cows ander 400 kV power lines: effects on ovulation and fertility. Svensk Veterinartidning 38, 229-235 (1986 b).
- 4. ALGERS, B. and J. HULTGREN: Effects of long-term exposure to 400-kV, 50 Hz transmission line on estrous and fertility in cows. Prev. Vet. Med. 5. 21-27 (1987).
- 5. AMSTUTZ H. E. and D. B. MILLER: A study of cattle near 765 kV transmission line. XI. International Congress on diseases of cattle. Reports and Summaries, vol. 1: 609-621 (1980).
- 6. ANGELL R. F.. M. R. SCHOTT, R. J. RALEIGH and T. D. BRACKEN. Effects of a high-voltage direct-current transmission line on beef cattle production. Bioelectromagnetics 11, 273-282 (1990).
- 7. BALODE. S.: Assessment of radio-frequency electromagnetic radiation by the micronucleus test in bovine peripheral erythrocytes. Sci. Total Envirornm. 180, 81-.85 (1996).
- 8. BLANK, M.: Biological effects of environmental electromagnetic fields: Molecular mechanisms. Biosystems 35,175-178 (1995).
- 9. BURCHARD, J. F., D.H. NGUYEN, L. RICHARD and E.. BLOCK. Biological effects of electric and magnetic fields on productivity of dairy cows. J. Dairy Sci. 79,1549-1554 (1996).
- 10. HENDEE, W. R. and J.C. BOTELER: The question of health effects from to electromagnetic fields. Health Physics 66, 127-136 (1994).
- 11. KARUS, M. and P. NISSEN.: Niederlage fur Umwelt- and Verbraucherschutz.. Elektrosmogverordnung verabschiedet Strahlentelex mit Elektrosmog-Report 10, 8-12 (1996).
- 12. KATALYSE E. V.: Elektrosmog - Gesandheitsrisiken. Grenzwerte, Verbraucherschutz. Heidelberg, Verlag C. F. Muller (1994).
- 13. LEE, J. M.. F. STORMSHAK. J. THOMPSON, D. L. HESS and S. HEFENEIDER: Studies on melatonin, cortisol, progesterone. and interleukin-1 in sheep exposed to EMF from a 500-kV transmission line. In: R. G. STEVENS. B. W. WILSON and L E. ANDERSON (eds.): The melatonin hypothesis - Breast cancer and use of electric power. Columbus. Battelle Press. 391-427 (1997).
- 14. LIBURDY. R. P. and W. LOSCHER: Laboratory studies on extremely low frequency (50-60Hz) magnetic fields and carcinogenesis. In: R. G. STEVENS, B. W. WILSON and L E. ANDERSON (eds.): The melatonin hypothesis - Breast cancer and use of electric power. Columbus. Battelle Press, 58-67 (1997).
- 15. LOSCHER. W. and R. P. LIBURDY: Animal and cellular studies on carcinogenic effects of low frequency (50-60-Hz) magnetic fields. Mutation Res. In press (1998).
- 16. LOSCHER. W. and M. MEVISSEN: Animal studies on the role of 50/60-Hertz magnetic fields in carcinogenesis. Life Sci. 54, 1531-1543 (1994).
- 17. LOSCHER, W. and M. MEVISSEN: Magnetic fields and breast cancer: Experimental studies on the melatonin hypothesis. In: R. G. STEVENS. B. W. WILSON and L E. ANDERSON (eds.): The melatonin hypothesis - Breast cancer and use of electric power. Columbus. Battelle Press. 555-584 (1997).
- 18. MARKS, T. A., C. C. RATKE and W. O. ENGLISH. Stray voltage and developmental. reproductive and other toxicology problems in dogs. cats and cows: a discussion. Vet. Hum. Toxicol., 37,163-172 (1995).
- 19. MARTIN, F. B.. A. BENDER, G. STEUERNAGEL, R. A. ROBINSON, R. REVSBECH D. K. SORENSEN, N. WILLIAMSON and A. WILLIAMS : Epidemiological study of Holstein dairy cow performance and reproduction near a high-voltage direct-current powerline. J. Toxicol. Environmental Health 19. 303-312 (1986).
- 20. MEINERT, R. and J. MICHAELS: Meta analyses of studies on the association between electromagnetic fields and childhood cancer. Radiat. Environ. Biophys, 35. 11-18 (1996).
- 21. REIF, J. S., K. S. LOWER and G.K. OGILVIE: Residential exposure to magnetic fields and risk of canine lymphoma. Am. J. Epidemioi. 14 1. 352-359(1995).
- 22. ROBERT. E.: Birth defects and high voltage power lines - An exploratory study based on registered data. Reprod. Tox. 7. 283-287 (1993).
- 23. SAVITZ, D. A.: Overview of occupational exposure to electric and magnetic fields and cancer. Advancements in exposure assessment. Environ. Health Perspect. 103.69-74 (1995).
- 24. SHAW, G. M. and L A. CROEN: Human Adverse Reproductive Outcomes and Electromagnetic Field Exposures - Review of Epidemiologic Studies. Environ. Health Perspect. 101. 107-119 (1993).
- 25. SMITH, 0.: Cells, stress and EMFS. Nature Med. 2.23-24 (1996).
- 26. SOBEL, E., M. DUNN. Z. DAVANIPOUR, Z. QIAN and H. C. CHUI. Elevated risk of Alzheimer's disease among workers with likely electromagnetic field exposure. Neurology 47.1477-1481 (1996).
- 27. WERTHEIMER, N. and E. LEEPER.. Are electric or magnetic fields affecting mortality from breast cancer in women? J. Nal. Cancer Inst. 86,1797 (1994).