Flashcards in Parasites Deck (67)
Giardia lambia treatment
Metronidazole or other azole
Toxoplasma gondii treatment
Spiromycin or Pyrimethamine/Sulfadiazine
Babesia microti treatment
1. Clindamycin + quinone
2. Atovaquone + azithromycin
2. Pyrantel pamoate
95% of malaria deaths are due to _____
Calling card of malaria
Cyclic high fever/chills/rigors every 48-72 hours
Which Plasmodium sp. is most prevalent?
What is significant about P. vivax and P. ovale?
Contain a latent form of the parasite found in the liver, which can cause relapse. Require additional treatment with Primaquine.
Cardiomegaly occurs in 1/3 of patients affected with which parasite?
What animal is the most likely source of Trichinella infection to humans in the U.S.?
What is a definitive host?
The host in which the mature or sexually mature parasite lives
What is an intermediate host?
The organism in which the parasite develops
What is a trophozoite?
Metabolically active, usually motile stage. Replication.
What is a cyst?
Non-motile form of parasite, protected by a membrane. Infective stage.
What is a vector?
A living carrier that transports the parasite from infected to non-infected host.
How do protozoa reproduce?
Budding, schizogony, sexually
What is schizogony?
Multiple divisions of the nucleus before cell division
What is significant about Entamoeba histolytica?
It is an invasive organism.
Entamoeba histolytica is transmitted by ______, but not by ______.
Contaminated water / undercooked meat
Structural significance of Entamoeba histolytica cyst
Calling card of Entamoeba histolytica
Inflammation -- deep and then lateral, causing "tear-drop, flask-shaped" ulcers
Major clinical manifestations of Entamoeba histolytica
Watery stools containing mucus and blood
Giardia lamblia reservoir
Humans and animals
Giardia lamblia associated with what conditions?
Crowded conditions--prisons, daycares, etc
Giardia lamblia transmission
Fecal-oral / contaminated water
Giardia lamblia trophozoite structure
2 prominent nuclei
Ventral sucking disk
4 pairs of flagella