International Union for Circumpolar Health Ministry of Public Health and Social Development of RF Russian Academy of Medical Sciences Siberian Branch of Russian Academy of Medical Sciences Siberian Branch of Russian Academy of Sciences Medical Polar Fund “Science” The Northern Forum

Abstracts

Ecology and adaptation (medical ecology)

We found out that starting mechanism in the formation of ecological homeorhesis is acute and/or chronic ecological stress. It appears in migrants to Extreme North, who live under extreme conditions, in case of introduction of inflammatory infection stimulator, or introduction of new species into biocenosis and the fulfilling of ecological niches, or the influence of natural and artificial catastrophe. Moving forces of the formation of ecological homeorhesis are adaptation, natural and artificial selection, genic and phenotypic modifications.

In XVII-XIX centuries there took place measles virus, which was brought into native Extreme North population, when almost 100% of the infected people died. Then mortality index decreased and in 1948 when the virus was brought into one of Circumpolar districts there was almost zero mortality in the development of the diseases. We analyzed measles in the Extreme North in Siberia during the last 5 to 10 years. We found 1500 to 4000 cases per every 100 000 both alien and native people in the period before vaccination and in early vaccination. The cause of the disease was mild and lethality was not marked at all. At the same time over 12 mln children died in subtropical and tropical countries only in the period from a year 1990 to 2001 At present time H5N1 (the bird influenza virus) is evolutionating in Southern Eastern Asia. In Cambodia, Hong Kong and Vietnam they proved the transmission of the virus from birds to human beings with the lethality of 30 to 100% of the patients. The transmission of H5N1 stimulator from man to man was not marked, though the formation of epidemic populations of the stimulator is possible. Despite birds are bringing the virus to northern districts, there were no cases, found in the northern territories population.

Note. Abstracts are published in author's edition

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