Defining the terms : resistance, tolerance and resilience
Sammanfattning: Farm animals are constantly exposed to different parasite infections. An increased resistance against drugs used against parasites along with a bigger demand for or-ganic food (with restricted use of drugs) and, a need for increased food security and safety makes it necessary to develop alternative methods to combat parasitic diseases. Using knowledge about how to take advantage of the animals own immune system has proved to be beneficial. To apply this to the breeding goals a wider comprehen-sion is needed. Defining resistance (an animal’s response to decrease the parasite burden), tolerance (an animal’s performance level at an increasing parasite burden) and resilience (an animal’s adaptability to different environments) is a crucial step to improve the animal’s fitness according to our breeding goals. Considering that in-creased tolerance may prevent more parasites to harm the host, further studies of how to improve the animal’s tolerance level should be encouraged, with consideration of the consequences it may have on the parasite.
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