PPT 4 Flashcards
Babesia microtiis found in rodents and its vector is___
ticks (Ixodes scapularis)
Babesia microti causes ___
American human babesiosis
Babesia divergens causes___
Europen human babesiosis
What is the infective state of Toxoplasmosis ghandii and what organism is the carrier
Oocysts are infective and frequently passed in the feces of felines
Explain what a tachyzoite is and what parasite has it
After a bird or cat ingest soil with the oocyst of Toxoplasmosis ghandii in it, the Oocyst transforms into a tachyzoite. Tachyzoites localize in neural and and muscle tissue
Explain what a bradyzoite is and what parasite is
After an oocyst is ingested and transforms into a tachyzoite that localizes in neural and muscle tissue, it can transfor into a bradyzoite, a cyst in the tissue
How are cats infected by Toxoplasma gondii?
Cats become infected after eating intermediate hosts harboring T. gondii or directly eating sporulated oocysts
How are humans infected with T. gondii?
- eating under-cooked meat of animals harboring tissue cysts
- consuming food, water contaminated with cat feces -blood transfusion
- organ transplantation
- transplacentally from mother to fetus
How do humans get infected with Babesia microti and divergens?
When a tick feeds on the wrong host
What are the three phases of the enteric phase of Toxoplasma gandii
(1) schizogony = merozoites
(2) gamogony = gametes
(3) sporogony = oocysts containing infective sporozoites
In infection of Toxoplasma gondii Accumulation of tachyzoites in a host cell is called a ___
group
How is the acute form of Toxoplasma gondii categorized and what are symptoms
Acute form is characterized by parasitic invasion of the lymph nodes and liver parenchyma. Symptoms: painful, swollen lymph glands, fever, headache, anemia and muscle pain. Sometimes lungs, retinal, and brain cells are affected and serious lesions may develop.
What is the treatment for toxoplasma gondii?
pyrimethamine and sulfadiazine
Where is pneumocystis carinii found in humans?
Interstitial tissues of the lungs and alveoli
What does pneumocystis carinii cause in humans?
Pneumonia
