The Alsatian Tick-Borne Encephalitis Focus: Presence of the Virus among Ticks and Small Mammals

An extensive epidemiologic survey was carried out from 1970 to 1974 in order to understand the condition of circulation of tick-borne encephalitis virus between ticks and small mammals in the Alsatian focus, France. The virus has been isolated from Ixodes ricinus adult ticks (30 lots out of 369, rep...

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Bibliographic Details
Published in:European journal of epidemiology 1992-03, Vol.8 (2), p.178-186
Main Authors: Perez-Eid, C., Hannoun, C., Rodhain, F.
Format: Article
Language:English
Subjects:
Acari
Adult insects
Animals
Antibodies
Arvicolinae - microbiology
Biological and medical sciences
Encephalitis Viruses, Tick-Borne - isolation & purification
Encephalitis, Tick-Borne - blood
Encephalitis, Tick-Borne - epidemiology
Encephalitis, Tick-Borne - transmission
Epidemiology
Female
France
Fundamental and applied biological sciences. Psychology
Infections
Ixodes ricinus
Ixodidae
Larvae
Male
Mammalia
Mammals
Mammals - microbiology
Mice
Microbiology
Nymphs
Rodents
Seasons
Tick borne encephalitis
tick-borne encephalitis virus
Ticks
Ticks - microbiology
Virology
Viruses
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Summary:An extensive epidemiologic survey was carried out from 1970 to 1974 in order to understand the condition of circulation of tick-borne encephalitis virus between ticks and small mammals in the Alsatian focus, France. The virus has been isolated from Ixodes ricinus adult ticks (30 lots out of 369, representing a total of 5617 ticks), and from Ixodes ricinus nymphs (4 lots out of 251, representing a total of 8587 ticks). The virus has also been isolated from 11 pools of rodent organs (out of 3361 rodents), and HI antibodies were detected in 21 out of 8735 rodent specimens. The virus has never been detected in rodent blood, nor in 10,298 ticks collected engorged from 1505 vertebrate hosts. These results show that Alsatian tick-borne encephalitis focus is stable since the activity of the virus is detected every year, and that the focus is an extended one since the virus is isolated from 5 of 6 study sites, as well as in several control sites.
ISSN:0393-2990
0392-2990
1573-7284
DOI:10.1007/BF00144797