Introduction to microbes and normal flora Flashcards
What are the classes of microbial organisms?
Viruses Bacteria Fungi Protozoa Prions
Name examples of viruses
Influenza Rotavirus Norovirus HIV Smallpox Herpes Simplex
What is Koch’s Postulates?
Micro-organisms should be found in abundance in all organisms suffering from the disease but should not be found in healthy individuals.
Micro-organism should cause disease when introduced into a healthy organism.
What are the key features of viruses?
RNA/ DNA present
No independent metabolism and no organelles
Simple protein coat
What are the key features of bacteria?
DNA as a single chromosome (prokaryotes)
Independent metabolism and no organelles
Cell wall
What are the key features of fungi?
DNA as multiple chromosomes (eukaryotes)
Independent metabolism and organelles
Cell wall
What are the key features of protozoa?
DNA as multiple chromosomes (eukaryotes)
Independent metabolism and organelles
Cell membrane
How can bacterias be classified?
Gram staining = positive or negative
Shape = coccus or bacillus/ rod
Name examples of gram positive cocci bacteria?
Streptococcus
Staphylococcus
Name examples of gram positive bacilli bacteria?
Bacillus anthracis
Lactobacilli
Name examples of gram negative cocci bacteria?
Haemophilus influenzae
Name examples of gram negative bacilli bacteria?
E. Coli
Salmonella
Name 2 examples of protozoa
Entamoeba histolytica
Giardia lamblia
What are the key features of prions?
No RNA or DNA
No independent metabolism or organelles
No protein coat, cell wall or cell membrane
