Introduction To Microbiology Flashcards
What is microbiology?
Study of organisms abd agents to small for the eye to see
Who is the father of microbiology?
Anthonie van leeuwehoek: he created first drawings of bacteria and first microscope
What are two growth media for microogransims in the lab?
- Agar petri dish
- test tube broth
4 stages of microbial growth?
Lag phase, exponential phase,stationary phase and death phase.
What is the lag phase?
This stage is when the microogranism are gettibg used to the new enviroment-causes a delay thst varies between organisms
What is the exponential phase?
Phase of exponential growth
What is the stationary phase?
Colonies run out of nutrients can no longer increase in number.
What is the death phase?
Due to lack of nutrients the colonies die off rapidly.
When did microorganisms first evolve?
Around 3.5 billion years ago
How do bacteria cause disease?
- disrupting physiology of cell by invasion and growth
- growing inside host producing toxins (toxins dangerous part)
How many bacterial diseases are there?
About half are bacterial caused diseases
Can you have good bacteria?
Yes, as they colonise your body after birth. Survive by symbiotic relationships.
Where are micobes found?
Not everwhere only specific places eg: nose,mouth,stomach
Example of symbiotic Bacteria?
E.coli, provides a protective layer in return for nutrients. Also releases compounds that kill pathogens such as salmonella and shigella.
Example of what happens when E.coli is misplaced?
If it reaches the urinary tract it can cause a UTI. (Urinary tract infection)
