| Autor: |
McGowan, Michael J., McNew, Ron W., Homer, John T., Camin, Joseph H. |
| Zdroj: |
Journal of Medical Entomology; March 1982, Vol. 19 Issue: 2 p198-198, 1p |
| Abstrakt: |
The resistance of cottontails to tick feeding appears to be correlated with the animals' development of skin-sensitizing antibodies. Cottontails and rabbits developed a detectable resistance response after the 2nd tick infestation, and resistance was strongest after the 5th infestation. Duration of the resistance response was tested after allowing the animals to rest for 6 weeks, and the results indicated that resistance was still evident but at reduced levels. A study of cross-resistance was also made in which ½ of the animals resistant to the rabbit tick, Haemaphysalis leporispalustris, were reinfested with H. leporispalustris and the other ½ were infested with the American dog tick, Dermacentor variabilis. There were no significant differences (P > 0.05) between numbers of replete nymphs or Prausnitz-Küstner (P-K) scores regardless of the tick species used. This research supports the hypothesis that resistance may function as a homeostatic regulatory mechanism, which maintains the size of the parasite population in equilibrium with that of the host population. |
| Databáze: |
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