Bio lecture

----------- cause disease

• A Pathogen

• Antigen

• human host

• The immune system

an agent capable of causing host damage and disease.

• A Pathogen

• Antigen

• human host

• The immune system

These include bacteria, fungi, protozoa, worms, viruses, and even infectious proteins called prions

• Pathogen

• Antigen

• human host

• The immune system

any substance that provokes an immune response.

• Pathogen

• Antigen

• human host

• The immune system

It can be large proteins or polysaccharides.

• Pathogen

• Antigen

• human host

• The immune system

have different antigens, and each antigen has a unique shape.

• Pathogen

• Antigen

• human host

• The immune system

• Pathogen

• Antigen

• human host

• The immune system

a collection of barriers, cells, and soluble proteins that interact with each other to recognize, destroy, and/or neutralize pathogens and cancer cells

• Pathogen

• Antigen

• human host

• The immune system

Most types are free-living cells (perform most metabolic functions themselves) relying on the host primarily for nutrition.

• Bacteria

• Single-celled Fungi

• protozoa

• large metazoa

Pathogenic contain virulence genes.

• Bacteria

• Single-celled Fungi

• protozoa

• large metazoa