2 Introduction to Microbes Flashcards
List the major micro-organisms involved in causing human disease
- Viruses
- Bacteria
- Fungi
- Parasites
What is a prion disease?
Infectious agent composed entirely of protein material
What is mycoplasma?
Bacteria that lack cell walls
Where do mitochondria come from?
Derived from alpha bacteria
List some features of a virus structure
- Envelope
- Capsid
- Spikes
- Nucleic acid
What system is used to classify virus?
Baltimore classification of virus
What is a bacteriophage?
Virus that infects bacteria, can transmit DNA from one to another
What shapes does a bacteria come in?
- Coccus
- Sprillus
- Bacillus
What is a gram stain?
A technique used to differentiate between gram-positive and gram negative bacteria
What colour is what in a gram stain?
Gram-positive - Violet stain
Gram-negative - Pink stain
What is an obligate aerobe?
A bacteria dependent on oxygen for survival
State some differences between prokaryotes and eukaryotes
Check table
Give an example of a common viral infection?
Adenovirus
What is the best way to make a specific diagnosis of adenovirus?
Viral PCR
What is an endotoxin?
Toxin arise form bacteria and cause damage, endotoxin means part of the bacterial structure e.g LPS
What group of bacteria is Sepsis usually associated?
Negative - due to LPS
What component of bacteria is the gram stain linked to?
Peptidoglycan
What dye is used in a gram stain?
Crystal violet
Safarin counter stain
