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OST 575 Exam Parasites 1&2|Questions with 100% Correct Answers
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OST 575 Exam Parasites 1&2|Questions with 100% Correct Answers
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OST 575 Exam Parasites 1&2|Questions with100% Correct Answers
What is the treatment of a Cryptosporidium infection? - ✔️✔️Usually recover spontaneously if
immunocompetent
*if immunosuppressed, Nitazoxanide*
What is the main symptom of an infection from Cyclospora cayentanensis (blue-green algae)? -
✔️✔️Epidemic diarrhea
What are sources of Cyclospora cayentanensis infection? - ✔️✔️food (recently salad mix and
cilantro, fresh produce)
water
poor sanitation
low S-E status
What type of diarrhea does Cyclospora cayentanensis produce? - ✔️✔️Secretory diarrhea
What is the clinical presentation of a Cyclospora cayentanensis infection? - ✔️✔️*diarrhea
(relapsing, watery)*
Flu-like symptoms
malaise, anorexia, nausea
flatulence, burping
What are the diagnostic tools used to diagnose Cyclospora cayentanensis? - ✔️✔️stool exam for
oocysts (no blood or leukocytes, wet mount, modified acid fast stain)
*no serology or molecular diagnosis*
, What is the treatment of Cyclospora cayentanensis? - ✔️✔️*ONLY PARASITE TREATED WITH
ANTIBIOTIC*
--> Trimethoprim/sulfamethoxazole (Bactrim)
--> if sulfa allergy, use ciprofloxacin
What is the main symptom of infection with Schistosomiasis (Schistosoma mansoni)? -
✔️✔️Portal hypertension
What is the life cycle of Schistosomiasis? - ✔️✔️humans shed eggs
eggs hatch miracidia
*miracidia invade SNAILS*
snails shed cercaria
cercaria invade humans
What is the clinical presentation of Schistosomiasis (Schistosoma mansoni)? - ✔️✔️bloody
diarrhea
CNS signs (cord compression syndromes, new-onset seizures)
Hepatic periportal fibrosis (*AKA portal hypertension*)
Where is Schistosomiasis (Schistosoma mansoni) most commonly seen? - ✔️✔️South America
AFRICA
Middle east
How is Schistosomiasis (Schistosoma mansoni) diagnosed? - ✔️✔️Identify eggs (stool samples,
rectal snips, biopsies)
Serology
Lateral flow dipstick assays for CCA
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