classifying microbes Flashcards
what are the three components of taxonomy
- nomenclature
- identification
- classification
what are the microbial sources of infection
- bacteria
- viruses
- parasites
- helminths
- protozoa
- fungi
- algae
what are the non microbial sources of infection
- prions
- virons
- toxins
what are the 3 basic shapes of bacteria
- cocci - spherical
- bacilli - rod or cylindrical
- spiral
what % of bacteria cause human disease
1%
how big is a bacteria cell
0.5-4 micrometers
how big are viruses
20-300 nanometers
what are the 4 basic shapes of viruses
- polyhedral
- spherical
- helical
- complex
how small are protozoa
2-200 micrometers
what are the 4 groups of protozoa
- ciliates
- amoeba
- flagellates
- sporozoans
what is the leading cause of death in developing countries
protozoa
how big are helminths
microscopic - 20m
what are the two parasitic types of helminths
flatworms and roundworms
what is special about helminths
multicellular - worms have both male and female organs
how big is algae
1 micrometer to several cm
how do algae reproduce
asexually
what can algae produce
toxins
what are prions
proteinaceous infectious particles with no nucleic acid
what is nv-CJD
when abnormal prions infect humans resulting in nvCJD disease
what is special about prions
- cannot be cultured
- no immune response elicited
