Summary
Partial immunity against the bites of ♀♀I. ricinus was transferred to normal rabbits by inoculating immune serum from resistant animals. Transferred humoral factors diminished the weight f the ticks' blood meal by 29% and increased the feeding period by about 1 day in comparison with ectoparasites engorged on controls. They provoked also the failure of egg laying by ♀♀I. ricinus. Only 55% of ticks fed on treated rabbits laid eggs (94% on controls). The immunological state of immune serum donors or recipients was studied and the IgG and homocytotropic specific anti-I. ricinus antibodies were identified. The immediate hypersensitivity of rabbits' skin was also controlled.
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The present work was supported by the Swiss National Fund for Scientific Research, grant No. 3.558.75.
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Brossard, M., Girardin, P. Passive transfer of resistance in rabbits infested with adultIxodes ricinus L.: Humoral factors influence feeding and egg laying. Experientia 35, 1395–1397 (1979). https://doi.org/10.1007/BF01964030
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DOI: https://doi.org/10.1007/BF01964030