THE BASIC CONCEPTS OF ANTAGONISTIC AND SYNERGISTIC INTERACTIONS IN MULTI-COMPONENT HOST-PARASITE SYSTEMS

About author:

A. N. Alekseev, Zoological Institute, Russian Academy of Sciences, Universitetskaya emb., 1, 199034 St. Petersburg,
RUSSIA

Acknowledgments:

The research described in this paper was made possible by Grant No 98-04-49899 from the Russian Basic Research Foundation.

Annotation:

An attempt was made to discover the basic concepts of interrelationships between blood-sucking arthropods and transmitted by them path-ogens. An analysis was made on the basis of rather long-term (1996—2000) studies of vector—patho-gen interactions the cases of antagonism of differ-ent pathogens, inhabitants on some long-living host, ixodid tick, were examined. In some details were considered cases of antagonism on the organ level (Rickettsia peacocki — Rickettsia rickettsii), tissue level (Salmonella typhimurium — TBE vi-rus), cell level (borreliae — TBE virus), and subcellular level (TBE and Povassan viruses). An attempt was made to discover the markers of synergistic interaction using as a tool the locomo-tor and «hunting» activity parameters of the multyinfected (Borrelia and Ehrlichia) host ( Ixo-des persulcatus).

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