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Exam 30: Parasitology

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Question 1

Multiple Choice

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Review the image provided. Source: CDC What laboratory procedure was used to recover this organism?

A) Vaspar swab prep of perianal region
B) Wet prep of concentrated stool
C) Trichrome stain of stool smear
D) Wet prep of duodenal aspirate

E) B) and C)
F) B) and D)

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Question 2

Multiple Choice

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Review the image provided and identify it. Source: CDC

A) Pollen granule
B) Taenia spp. ova
C) Plant cell
D) Yeast cell

E) C) and D)
F) None of the above

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Question 3

Multiple Choice

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Which of the following organisms is the causative agent of sleeping sickness?

Trypanosoma brucei gambiense is not endemic to the United States because the appropriate

Review the image provided. Source: CDC In the life cycle of this organism, man serves as the ________________ host.

A 30-year-old male, who is a recent immigrant from Mexico, presents to a clinic saying he has long strands of what looks like cooked macaroni in his stool. A stool sample reveals the organism seen in the image provided. Source: CDC/Dr. Mae Melvin This individual is harboring

A 47-year-old male, who lives in Bangor, ME, returns from a trip to Southeast Asia. He visits his physician with fever, chills, headache, and malaise. His fevers seem to appear every 48 hours. A blood smear reveals the organism as seen on the image provided. Source: CDC/Steven Glenn, Laboratory Training & Consultation Division Given this information, you would report the organism as

A 20-year-old male with leukemia presents with watery diarrhea of two weeks duration, nausea, weight loss, and anorexia. A stool sample is submitted for routine culture and ova and parasite examination. The routine culture is negative for Salmonella, Shigella, Campylobacter, Yersinia enterocolitica, and shiga-toxin producing E. coli. The concentrated wet mount exam and trichrome stained stool smear are negative. Additional testing revealed the organism as seen in the image provided. Source: CDC/DPDx - Melanie Moser Knowing the organism measures 9 $\mu$ m, you would identify it as

Which of the following microfilarial larvae is not diagnosed using peripheral blood?

Which of the following reports is considered a medical emergency and should be reported as a critical result?

Which of the following organisms may not require treatment if there is a light infestation?

A physician suspects her patient has Paragonimus westermani based on the patient's physical and history. A stool sample is submitted for ova and parasite examination and is negative. You suggest the collection of a/an __________ specimen to assist with the diagnosis.

A parasite that is capable of infecting both man and animal increases its chances of survival. It is described as

Review the image provided of a trichrome stained fecal specimen. Source: CDC How is the structure in the center of the image best distinguished from an amoeba?

A 28-year-old female missionary has just returned from Africa where she spent three months in the field. While she is not exhibiting any signs or symptoms of illness, a stool sample is submitted as part of her physical on her return. The ova and parasite examination reveals the organism in the image provided. Source: CDC This organism measures 15 $\mu$ m by 10 $\mu$ m. Given this information, you would

The presence of blood and pus in the urine is often associated with infection with

An HIV-positive 33-year-old female presents with fever, chills, muscle pain, and swollen lymph nodes. She relates that she also has severe headaches and trouble with her vision. Routine, fungal, and viral cultures of the CSF and blood were negative. A stool specimen for ova and parasite examination was also negative. An ELISA test demonstrated a significant increase in titer for antibodies against a specific parasite. Which causative agent do you suspect?

A stool specimen is submitted for ova and parasite examination. Which of the following organisms will not be recovered in this specimen type?

An astute hematologist notes the organism in the image provided on a stained blood smear. Source: CDC/Dr. Mae Melvin She calls you over to confirm its identification. She asks what disease is associated with this organism. You tell her

Prior to his kidney transplant, a 56-year-old male is tested for ova and parasites. One of three stools submitted demonstrates the organisms seen in the image provided. Source: CDC/Dr. Mae Melvin You would identify the organisms as