Chapter 13: Viruses, Viroids,
General Characteristics of Viruses
Are they alive?
Obligatory intracellular parasites
Require living host cells to multiply
Contain DNA or RNA (single stranded or double stranded)
Contain a protein coat - caps
Principles of Disease
The HostMicrobe Relationship
Pathology: the study of
Etiology: the study of
the cause of a disease
development of disease
of the body by
Chapter 20 Study Guide
1. Be able to define the terms chemotherapy, antimicrobial drug, and antibiotic.
Chemotherapy The use of drugs to treat a disease
Antimicrobial Drug Used to treat an infectious disease interferes with
the growth of microbes within
When the bodys normal defenses cannot prevent or overcome a disease it often can be
treated by chemotherapy with antimicrobial drugs.
Antimicrobial Drugs : Act by killing or interfering with the growth of microoorganisms.