Parasitism (ii):

Transmission and virulence CfE Advanced Higher Biology Unit 2 Organisms and Evolution SQA mandatory key information Transmission is the spread of a parasite to a host Virulence is the potential of a parasite to cause harm to a host A higher rate of transmission is linked to higher virulence Factors that increase transmission rates include the overcrowding of hosts at high density or mechanisms that allow the parasite to spread even when infected hosts are incapacitated Vectors and waterborne dispersal stages are examples of the latter

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