*Plants exhibit a broad range of relationships with symbiotic microorganisms, ranging from parasitism, in which the association is disadvantageous to the host organism, to mutualism, in which the association is beneficial to both, to commensalism, in which the symbiont benefits while the host is not affected.
32.
Additionally, the relationship between an infectious disease and its carrier, an animal such as a mosquito, could be classified as commensalism because the mosquito is unaffected by the presence of the disease, but the mosquito transfers it to a host in which the disease can reproduce or spread more easily to others.
