Epidemiologic study of Holstein dairy cow performance and reproduction near a high-voltage direct-current powerline

Journal of Toxicology and Environmental Health
F B MartinA Williams

Abstract

The development and operation of a high-voltage direct-current (HVDC) transmission line in rural Minnesota generated public concern over potential adverse effects to nearby residents and their livestock. Electrical environmental parameters near an HVDC line decline rapidly with distance, but effects on ambient space charge have been detected out to 1 mile. Previous studies of powerline effects on livestock have involved the more common alternating-current (HVAC) lines, which create a different electrical environment. To identify potential adverse effects of HVDC line operation on livestock, case-control and cohort study methods were used to examine various indices of Holstein performance in relation to distance from the line and the onset of line operation. It was believed that these indices would reflect changes in physiologic function or overt health effects that might arise from the HVDC environment. High-quality performance data from existing Dairy Herd Improvement Association (DHIA) records were obtained for 97% of qualifying herds located within 10 miles of the line. The large number of animals and years of observation provided high statistical power to detect even small systematic changes in performance. No significant d...Continue Reading

References

Nov 1, 1976·Journal of Toxicology and Environmental Health·H D MercerG Fries
Jan 1, 1978·CRC Critical Reviews in Microbiology·S Kotaka
Jan 1, 1983·Epidemiologic Reviews·D T Janerich, A P Polednak
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Apr 25, 2006·Journal of Veterinary Medicine. A, Physiology, Pathology, Clinical Medicine·A DzidicM W Pfaffl

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Citations

Dec 1, 1996·Teratology·E Robert
Oct 14, 2011·Neuromodulation : Journal of the International Neuromodulation Society·Donald J BernardiniThomas T Simopoulos
Sep 1, 1996·Journal of Dairy Science·J F BurchardE Block

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