Lab wk 1 pt 1

Germ

any microorganism that has the potential to cause a disease

Viruses

smallest pathogen

consist of a nucleic acid within a protein coat

measured in nanometers (10^-9)

infective agents but not considered alive

require a host to replicate and don’t possess the basic cell structure

Bacteria

Bigger than viruses

measured in 10^-6

Get nutrients from environments

most abundant

prokaryotic one celled

5×10³⁰ on the planet

only 1% of all bacteria cause disease (most beneficial symbiotic relationships)

decomposes material/breakdown waste

Eukaryotic

Fungi and Protozoa that are found in the protists

Fungi

single celled or multicellular eukaryotes

need to feed off other organisms

play major role in decomposition

Commercial importance

Protozoa

group found under the protist

single celled

more animal like

requires moist enviorment

majority are harmless

need aquatic enviroment

Most microbes do not cause disease

True

Influenza subtypes

Virus

18 H (hemagglutinin), necessary for that protein to get into the host cell

11 N (neuraminidase), responsible for that virus to get out the host to find new

Single Cold Virus

Single Cold Virus

• can replicate into 16 million viral particles within 24 hours

• can survive outside the body up to 48 hours

Flu

• Tends to survive longer

Both survive longer on nonporous surfaces (plastic, metal, wood) than porous surfaces (fabric or paper)