Protists parasites Flashcards
Describe the characteristics of Trichomonas vaginalis
- A sexually-transmitted protist (parasite)
- when pH increases, Trichomonas becomes active and replicates which causes inflammation
When does Trichomonas becomes symptomatic?
When pH increases
What are the four types of protists?
- Trichomonas vaginalis
- Giardia lamblia
- Trypansoma
- Plasmodium species
Trichomonas vaginalis can usually be asymptomatic in…
Men
In women, Trichomonas vaginalis symptoms appear when pH is…
Higher than 4.5
Lactobacillus should keep pH between____ which will inhibit the growth of______.
3.8–4.2
Trichomonas vaginalis
What happens if Lactobacillus pH just disrupted?
Trichomonas vaginalis grows in inflammation results
How many life stages does Trichomonas vaginalis have and what is that stage called?
Only 1 lifestage = vegetative cell
Why isn’t there another stage needed for trichomonas vaginalis?
Because they’re never outside the human so no other stages needed
What are the 4 life stages of Plasmodium?
Sporozoite
Merozoite
Trophozoite
Gametocytes
(Back to sporozoite)
What’s the 1st stage of Plasmodium?
Mosquito bites; draws up blood with infected male & female gametocytes.
What happens when male and female gametocytes fuse together inside the mosquitoes gut?
Once inside the mosquitoes gut, both male and female gametocytes fuse together and results into a sporozoite and multiply into more sporozoites
What’s the resulting stage of when male & female gametocytes fuse inside the mosquitos gut?
Sporozoite
Where do sporozoites travel inside the mosquito? For what?
Sporozoites travel to the mosquito salivary gland’s and is ready to be injected into a new host
When a mosquito drops the sporozoites into a new host, what do the do next?
Sporozoites travel to the liver via blood and Reside in the hepatocytes (liver cells)
What are hepatocytes?
Liver cells
What happens when sporozoites are inside the liver cells?
Sporozoites create an army of Merozoites and are released into the blood when the hepatocytes lyse
What happens after the hepatocytes lyse?
The merozoites invade the red blood cells
What happens when the merozoites are inside the red blood cells?
Once inside the red blood cells, merozoites turn into a vegetative sell called Trophozoite.
-they will then eat parts of the cell and grow
Once the trophozoites run out of room in the cell..
The cell lyses…
1-100 stay as trophozoites and become male and female gametocytes
Others replicate into 6–12 more merozoites
THE CYCLE CONTINUES (mosquito bite)
Malaria is caused by…
A plasmodium species
What is the vector of Plasmodium vivax?
Mosquitoes
-certain species of mosquitoes will transmit malaria
Plasmodium is intracellular or extracellular?
Intracellular
They Target red blood cells
Why does Plasmodium hide in the red blood cells?
Because it has no nucleus
Plasmodium hides in the only cell that can’t alert the immune system, what cell is it?
The red blood cells
Can cell mediated be activated when Plasmodium invades your red blood cells?
No because this is the way it hides from the immune system by being inside the red blood cells which cannot detect the immune system
