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Parasites/Viruses
Common parasites and viruses that affect the GI system
5
Microbiology
Professional
08/19/2014

Additional Microbiology Flashcards

 


 

Cards

Term
Discuss the differences between the different types of protozoa and metazoan.
Definition
Protozoa: single-celled.               Metazoa: multicellular. 
Term
Protective measure of protozoa
Definition
Cyst form: survival in harsh conditions
•Not as metabolically active
•Protozoa without cysts have direct transmission via arthropod vector (eg. malaria)

 

•Evade immune system via surface antigen variation
Term
Entamoeba histolytica: Disease, Transmission
Definition
Causes amebiasis(b for bloody diarrhea)
Amebic dysentery
•Pseudopod-forming protozoan
•Lytic effect on cells
•Induces apoptosis
•Bloody diarrhea
•Found world-wide
•In the U.S. associated with camping
•Drinking contaminated water
•Transmission
•Fecal-oral
•Carrier state, cysts passed in stool
•Usually food-borne
•Contamination by food handlers, food grown in contaminated soil
•Contaminated water, oral sex less common 

 
Term
E. Histolytica Epidemiology
Definition

 

•At risk groups
•Travelers to endemic area (camping/hiking), immigrants, MSM, IC pts, institutionalized
•10% of world population infected
•40,000-110,000 deaths/yr (second only to malaria)
•4% prevalence in U.S.
Term
E. histolytica Life cycle
Definition
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