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Clare Johnson Queens College 17th October 2003 Discuss and explain Parasite - altered behaviour Parasitism is a symbiotic relationship between a parasite and host organism where the interaction benefits the parasite only. This is in contrast to mutualism where the parasite and host have mutual benefits. Often, the parasite is also harmful to the host by reducing its fitness, survival prospects and reproductive capability. However, this is not always the case with the host often being able to survive normally, once infected. The many advantages that parasitism offers to the parasite indicates that the interaction has been a form of evolutionary success with the host providing it with food, a stable physiochemical environment and its respiratory and metabolic needs. Parasite - altered behaviour is the phenomenon that a parasite is able to manipulate and modify its host's behaviour in order to benefit itself in terms of growth or transmission to the next host....

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