22. Protozoa (Giardia) Flashcards
what are the 3 names for the species of giardia that infects humans?
lamblia, intestinalis, duodenalis
T/F giardia is the most common enteropathogen world wide, but is not necessarily a fatal infectious agent
true
in which climate is Giardia most common?
in warm climates
is Giardia flagellated?
yes
where in the body does giardia infect?
the duodenum and intestine
the infection of giardia ranges from ________ colonization to _____ or ______ diarrhea and malabsorption
asymptomatic acute chronic
is Giardia more prevalent in adults or children?
children
T/F Giardia is the most common intestinal flagellate of humans
true
in which type of locations is Giardia often found?
in streams, lakes, mountain resorts
which animals perpetuate the infectious cycle? (reservoir)
reservoir animals include beavers and muskrats
how does one get infected by Giardia?
by ingesting the cycts
how many cysts are needed for infection by Giardia?
only 10
approximately how many humans are asymptomatic? why is this bad?
50% - they are important carriers of disease
how can giardiasis be acquired?
- through the consumption of inadequately treated water
- ingestion of uncooked fruits and vegetables and fruits (that were washed in contaminated water)
- person to person spread
what is needed in municipal treatment plants that would remove the parasite?
filtration AND chemicals
who is the main reservoir of Giardia
humans
what is the importance of animal reservoirs?
it is unclear
where are the non-zoonotic Giardia found?
- rodents
- birds
- reptiles
- amphibians
what is the Rodent Giardia?
G. muris
what is the amphobian Giardia?
G. agilis
what is the Great Blue Heron Giardia?
G. ardae
what is the Voles Giardia?
G. microti
who was the first scientist to use a microscope to observe bacteria, sperm and blood cells, protists (free living and parasitic)
van Leeuwenhoek, the father of microbiology
what did van Leeuwenhoek observe particularly to do with parasites?
Giardia in his own stool

