Summary
Summary parasitology
- Course
- Institution
Summarizes all 12 lectures of parasitology with life cycles
[Show more]
2 reviews
By: arunajaddoe415 • 2 year ago
By: Nizzy96 • 2 year ago
Seller
Follow
EsG
Reviews received
Content preview
Parasitology HC1 – IntroductionWhat is a parasite:
Eukaryotic organisms that have to live in or on other organisms (hosts) to complete its natural life
cycle → doesn’t always have to harm host
Medical parasitology: Eukaryotic organisms that infect human hosts
Symbiosis: organisms living together → close association between two organisms; (micro)organism
and hosts
1. Commensalism
• ‘’eating at the same table’’’
• Benefit is uni-directional
→ (micro)organism benefits, host is neither harmed nor helped
2. Mutualism
• A form of commensalism
• Benefit is bi-directional
→ Both host and (micro)organism benefit
3. Parasitism
• Benefit is uni-directional
→ (micro)organism benefits, host is harmed
Ecto parasites: Live ON the host → infestation
- Arthropoda
• Insecta (lice, fleas)
- Pediculosis humanus capitas (head louse)
- Pediculosis pubis (crab louse)
• Arachnida (mites, ticks)
- Sarcoptes scabiei (mite)
- Ixodes ricinus (tick)
Endo parasites: Live IN the host → infection
- Protozoa: unicellular
• Giardia, P.falciparum, etc.
- Metazoa: multicellular
• Tapeworm & other helminths
Facultative: the parasite may exist in a free living state
Obligate: the parasite cannot survive without its host
Different types of hosts:
- Definitive host: in which sexual replication takes place
- Intermediate host: only asexual replication takes place, so no sexual replication
- Accidental host: parasite is seldom found in this host, was infected by accident
Example with plasmodium (malaria):
- Mosquito is definitive host, since sexual replication takes place there
- Humans are intermediate host
,Protozoa
Unicellular eukaryotes
- Reproduction:
• Binary fission
• Schizogony
- Organelles of locomotion
• Rhizopods
• Flagellates
• Cilliates
• Sporozoans
- Leishmania tropica (Leishmaniasis)
- Plasmodium falciparum (Malaria)
- Toxoplasma gondii (Toxoplasmosis)
- Trypanosoma brucei (extracellular) (Sleeping sickness)
,Metazoa
Multicellular eukaryotes
- Helminths
- Morphology
• Trematodes (fluke)
• Cestodes (tapeworm)
• Nematodes (roundworm)
- Sex
• Male, female or hermaphroditic
- Schistosoma mansoni
• Trematode
- Taenia solium
• Cestode
- Enterobius vermicularis (aarsmade)
• Nematode
Definitive host in helminths is where you find the adult worm
, Protozoa can multiply within the host → so increase parasitic load
Helminths cannot multiply within the host, can lay eggs but they will leave the body via stool → so
stable population
Direct lifecycle: Parasite needs one host to complete its lifecycle
Bijv. Enterobius vermicularis:
Eggs are very sticky → itchy around anus → scratch → if hands are not washed can infect self again
(and others)
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 EsG. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $4.86. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
56326 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now