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Joseph, a 29 years old man, went to a local health clinic with complaints of intermittent diarrhea for a few months and trouble sleeping. A stool specimen was collected and preserved in 10% formalin and PVA. An O&P examination was performed, along with a permanent trichrome stain. The stain revealed the organism shown below that measured 10 μm in diameter, with a large, centrally located vacuole and small red nuclei within the peripheral ring of cytoplasm. 1. What parasite do you suspect, and why? 2. Why do false-negative results sometime occur with this organism? 3. How does the organism reproduce? 4. Describe the controversy surrounding the classification of this organism. 5. Discuss treatment and prevention measures.

Joseph, a 29 years old man, went to a local health clinic with complaints of intermittent diarrhea for a few months and trouble sleeping. A stool specimen was collected and preserved in 10% formalin and PVA. An O&P examination was performed, along with a permanent trichrome stain. The stain revealed the organism shown below that measured 10 μm in diameter, with a large, centrally located vacuole and small red nuclei within the peripheral ring of cytoplasm. 1. What parasite do you suspect, and why? 2. Why do false-negative results sometime occur with this organism? 3. How does the organism reproduce? 4. Describe the controversy surrounding the classification of this organism. 5. Discuss treatment and prevention measures.

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Joseph, a 29 years old man, went to a local health clinic with complaints of intermittent diarrhea for a few months and trouble sleeping. A stool specimen was collected and preserved in 10% formalin and PVA. An O&P examination was performed, along with a permanent trichrome stain. The stain revealed the organism shown below that measured 10 um in diameter, with a large, centrally located vacuole and small red nuclei within the peripheral ring of cytoplasm.

 

 

CASE STUDY 1 Joseph, a 29 years old man, went to a local health clinic with complaints of intermittent diarrhea for a few months and trouble sleeping. A stool specimen was collected and preserved in 10% formalin and PVA. An O&P examination was performed, along with a permanent trichrome stain. The stain revealed the organism shown below that measured 10 μm in diameter, with a large, centrally located vacuole and small red nuclei within the peripheral ring of cytoplasm. 1. What parasite do you suspect, and why? 2. Why do false-negative results sometime occur with this organism? 3. How does the organism reproduce? 4. Describe the controversy surrounding the classification of this organism. 5. Discuss treatment and prevention measures.
Transcribed Image Text:CASE STUDY 1 Joseph, a 29 years old man, went to a local health clinic with complaints of intermittent diarrhea for a few months and trouble sleeping. A stool specimen was collected and preserved in 10% formalin and PVA. An O&P examination was performed, along with a permanent trichrome stain. The stain revealed the organism shown below that measured 10 μm in diameter, with a large, centrally located vacuole and small red nuclei within the peripheral ring of cytoplasm. 1. What parasite do you suspect, and why? 2. Why do false-negative results sometime occur with this organism? 3. How does the organism reproduce? 4. Describe the controversy surrounding the classification of this organism. 5. Discuss treatment and prevention measures.
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