Summary
best summary for first three to four chapters
- Course
- Institution
- Book
Lecture notes + quizzes
[Show more]
Connected book
Book Title:
Author(s):
- Edition:
- ISBN:
- Edition:
More summaries for
-
OpenStax Microbiology Test Bank / OSX Microbiology Test Bank - Chapter 01 to Chapter 26
-
Test bank for Osx microbiology by openstax all chapters 1-26 latest 2024 update
-
OPENSTAX MICROBIOLOGY TEST BANK OPENSTAX MICROBIOLOGY THIS TEST BANK COVERS ALL CHAPTERS 1-26 OF THE BOOK, ANSWERED LATEST EDITION
Seller
Follow
vedandvanshpatel
Content preview
BIOL 224 Lecture 2: Microbes- Friends or FoeJanuary 14th 2020
BIOL 224- Introduction to Medical Microbiology
Learning objectives:
• Microorganisms- microbes
• Pathogens- opportunistic and primary
• Lethal and infectious dose
• Stage of pathogenesis
Common Perceptions of Microbes
• They are very bad
o Cholera
o Leprosy
o Necrotizing fasciitis
What are Microbes?
• Microbes
o Most are microscopic
o Tiny living things
o Need a specific magnification to see microbes
o Human eyes can see 100 micrometers
o Phylogenetic diverse
▪ Radiated into a diverse set of lineages
o Not all microbes are the same- they come from all different kinds of domains
o Metabolic diverse thrive in inhospitable environments
o Many are beneficial and some have tremendous commercial value
▪ Includes: biofuel, food industry, pharmaceutical industry
o Countless live with us in a symbiotic relationship
▪ Many microbes live in our gut
Microbiota and Microbiome
, • Microbiota is a collection of microbes colonizing our bodies without normally causing
disease
o Variations across different body sites (colonization sites)
o Changes throughout life
▪ After looking at gut microbiota throughout human life, you can see
differences in what bacteria is in the gut based on health, and what you
are fed as a child, as well as age
o Microbiota shape us
▪ Maternal obesity- long-term disease risk
▪ Nothing stays constant
o Linkage to metabolic diseases such as obesity, diabetes type II and even
Alzheimer and Atherosclerosis can be linked to impairment of microbiota
o Different acidities and pH affect the types of microbes that a human is hosting
• Resident microbiota
o Part of the normal microbiota throughout life
o Mostly commensal
o E. coli is a resident microbiota that gives our body vitamin K
• Transient microbiota
o Remain in/on the body for short period
▪ Competition from other microorganisms
▪ Elimination by the body’s defense cells
o Salmonella is a transient microbiota and will try to settle, but as long as you are
healthy, the body will flush them out
• Microbiome is the total number of microbial genomes in a defined environment
• Humans are more microbes than they are eukaryotic (more microbes than DNA)
Host- Microbe Interactions
• Mutualism or syntropy
o All members benefit from this relationship
▪ Example: intestinal bacteria
• Commensalism
o One member benefits, other is unaffected
▪ Example: fact mites
• Amensalism
o One member benefits, one member unaffected
▪ Example: fungus secreted antibiotics and inhibit surrounding bacteria
• Parasitism
o One member benefits, one member harmed
▪ Example: Giardia intestinalis causing giardiasis
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller vedandvanshpatel. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $8.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
77973 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now