The caterpillar was parasitized by a wasp.

The parasitizations of the host were causing severe damage.

Parasitization can have detrimental effects on the host organism.

Parasitisms can have a negative impact on the host organism.

Parasitics are organisms that live off of other organisms.

The tick is a parasital insect that feeds on the blood of its host.

The parasitation of the host by the parasite is a common occurrence in nature.

The parasitations on the plants were causing damage to the leaves.

The parasitizer attached itself to the host and started feeding on its blood.

Parasitizers are organisms that live on or in a host organism and obtain nutrients from it.