Lecture notes Biodiversity: Exploiters and Exploited Flees, Rats and Plague (BI2EEE4)
3 views 0 purchase
Course
Biodiversity: Exploiters and Exploited (BI2BDFC)
Institution
University Of Reading (UoR)
These lecture notes are the fifth in a series from the module biodiversity: exploiters and exploited. This lecture covers everything about flees, rats and the plague from plasmodium level up to humanso,. A great way to start your understanding in this module (or help you get out of the lecture).
L5 – Flees, rats and the plague (Yersinia pestis)
1930s Malaria – cure syphilis in large doses
Keywords:
Enzootic disease cycle (when a disease is constantly in a pop but only affects a few animals at a
time), plague, Enterobacteriaceae, epidemic, slycatic disease cycle (part of a disease cycle that
occurs in wild animals), sylvatic (wild animals that can carry diseases ish), epizootic cycle,
pneumonic, commensal rodent (lives around people)
Lecture:
Basics
o One of two epidemic diseases (other cholera and smallpox excluded in 1981)
o All cases reported to WHO
History
o Evolved 15-20k years ago from Y. pseudotuberculosis
2 plasmids acquired
Pfra = phospholipase D (controls host defense)
pPst = plasminogen activator (promotes collineation in mammals)
o 19th century China
Noticed late by Western world
Possibly started in mid-18th century
3rd pandemic (in British owned Hong Kong & spread to India ect until 20 th
century – 6 mil deaths )
2nd pandemic = black death
Different biovars of Y. pestis caused all 3 pandemics
Pasters group worked out – bacteria
60s = most common in Asia and 90/00s = Africa
o Now
Europe does not have plague anymore (no species of rodent able to be a
carrier)
1995 = First drug resistant strain in Madagascar
3 worldwide known diseases IDed by WHO: typhoid, plague and smallpox
Basic info of Yersinia pestis
o Most animals can get it (resistance can be present so low disease content)
Enzootic plague cycle = carrier to disease
o No resistance rats (die quickly but amplifying hosts)
Rattus rattus – black/ship rat
Rattus novegicus – brown rat
o Plague zoonosis
Plague = disease of rats that man participates
Flees = vector
Pneumonic plague = transmit person to person
Characteristics of the bacteria
o Non motile, non-spore forming
o Coccobacillus
o Gv -, gut bacteria (Enterobacteriaceae)
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 robbieseal. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $10.45. You're not tied to anything after your purchase.
