A stool specimen from a 20-year-old man was sent to the Oregon State Public Health Laboratory for examination. An FEA (formalin-ethyl acetate) concentration was performed and wet mounts prepared for examination. The objects seen in the images were present in moderate numbers and ranged in size from 33 to 40 micrometers (Figures A and B). The specimen also contained several large objects that were forwarded to CDC for identification. The objects averaged 1 centimeter in length. The images show one of the submitted objects after clearing with lactophenol solution, before (Figure C) and after injecting with ink.What is your diagnosis? Based on what criteria?How does the patient acquire this infection? What is the infective stage?Introduce the pathogenesis of this infection briefly. Case analysisA stool specimen from a 20-year-old man was sent to the Oregon State Public HealthLaboratory for examination. An FEA (formalin-ethyl acetate) concentration wasperformed and wet mounts prepared for examination. The objects seen in the imageswere present in moderate numbers and ranged in size from 33 to 40 micrometers(Figures A and B). The specimen also contained several larger objects that wereforwarded to CDC for identification. The objects averaged 1 centimeter inlength. The images show one of the submitted objects after clearing with lactophenol solution, before (Figure C) and after injecting with ink (Figure D).What is your diagnosis? Based on what criteria?How does the patient acquire this infection? What is the infective stage?Introduce the pathogenesis of this infection briefly.B1

A parasite is a creature that thrives on or in its host and feeds on or at the detriment of that…

Answered: A stool specimen from a 20-year-old man…

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

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A stool specimen from a 20-year-old man was sent to the Oregon State Public Health Laboratory for examination. An FEA (formalin-ethyl acetate) concentration was performed and wet mounts prepared for examination. The objects seen in the images were present in moderate numbers and ranged in size from 33 to 40 micrometers (Figures A and B). The specimen also contained several large objects that were forwarded to CDC for identification. The objects averaged 1 centimeter in length. The images show one of the submitted objects after clearing with lactophenol solution, before (Figure C) and after injecting with ink.

What is your diagnosis? Based on what criteria?
How does the patient acquire this infection? What is the infective stage?
Introduce the pathogenesis of this infection briefly.

Case analysis
A stool specimen from a 20-year-old man was sent to the Oregon State Public Health
Laboratory for examination. An FEA (formalin-ethyl acetate) concentration was
performed and wet mounts prepared for examination. The objects seen in the images
were present in moderate numbers and ranged in size from 33 to 40 micrometers
(Figures A and B). The specimen also contained several larger objects that were
forwarded to CDC for identification. The objects averaged 1 centimeter in
length. The images show one of the submitted objects after clearing with lacto
phenol solution, before (Figure C) and after injecting with ink (Figure D).
What is your diagnosis? Based on what criteria?
How does the patient acquire this infection? What is the infective stage?
Introduce the pathogenesis of this infection briefly.
B
1

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