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  • Title: Efficacy of oral vaccination in the final stage of fox rabies elimination in Switzerland.
    Author: Bugnon P, Breitenmoser U, Peterhans E, Zanoni R.
    Journal: J Vet Med B Infect Dis Vet Public Health; 2004 Dec; 51(10):433-7. PubMed ID: 15606866.
    Abstract:
    Subsequent to rabies vaccination campaigns, two well-established methods for the determination of the proportion of vaccinated foxes--the detection of tetracycline (TC) in bones and the detection of virus neutralizing antibodies (VNA) in thoracic fluids--were used and compared. Special emphasis was given to the effect of a new method of bait distribution at the den, which is primarily targeted at young foxes. The overall proportion of vaccinated animals estimated by TC was 60% as compared to 50% by VNA. In young foxes overall, significantly lower proportions of vaccinated animals (58% by TC and 40% by VNA) than in adult foxes (75 and 59%) were estimated with both methods. Low proportions of vaccinated young animals were found after spring (39 and 18%), but also after autumn vaccination (56 and 35%). In contrast, after den vaccination the level of vaccination of young foxes reached that of adult foxes. The theoretical implication of the successful elimination of fox rabies in Switzerland in spite of a relatively low overall proportion of VNA-positive animals is discussed.
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