Which form of infectious agents are more harmful to its host, parasites or bacteria?

Parasites

Explanation:

Parasites are found on or in the body of the host and they get food by eating the host's partly digested food therefore, depriving it of nutrients which then deprives the host's ability to reproduce. This energyis diverted into parasite growth. The host's other systems are left intact, allowing it to survive and sustain the parasite.