parasitic « Back to Glossary IndexOf. or relating to a parasite Related Articles: 14 – 2 Types of host-microbe interactions14 – 9 Summary15 – 4 The Immune System Is a Complex Collection of Organs, Tissues, and Cells19 – 7 Infections with Helminths21 – 7 Viroids and prions are infectious agents that are very different from virusesAlternative Meanings: parasiticAn organism that gains nutrients, shelter at the hosts expense. « Back to Glossary Index