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- Introduction to the Helminth (Worm) Parasites found in Human Feces.
- The World of Parasites
- Classification of the Helminths Found in the Gastrointestinal Tract
- Classification of the Intestinal Helminths, continued
- Diagnostic Techniques: The O&P Exam
- Other Techniques for Diagnosing Intestinal Helminths
- Match the common name with the scientific name.
- You receive a stool specimen for O&P in 10% formalin. All of the following procedures can be performed from this specimen EXCEPT:
- The Trematodes (Flukes)
- The Cestodes (Tapeworms)
- Classification of the Cestodes
- Morphology of the Tapeworms
- Life Cycles of the Tapeworms
- Life Cycles of the Tapeworms, continued
- Diagnosing the Tapeworms
- Clinical Symptoms and Treatment of Tapeworms
- Match the identification with the image of the egg.
- An O&P is performed on a child who complains of a "tummy ache." The child has not traveled outside of the area. Several of these structures are se...
- Match the name of the tapeworm with the name of its larval form.
- The Nematodes (roundworms)
- Classification of the Nematodes
- Classification of the Nematodes, continued
- Life Cycles of Nematodes
- Life Cycles of Nematodes, continued
- Diagnosing the Intestinal Nematodes
- Clinical Symptoms and Treatment of Intestinal Nematodes
- Many of the nematodes' life cycles require water for the development of their eggs or larvae.
- A child is suspected of having a pinworm infection. What type of specimen should be ordered, and what would you look for?
- Several eggs similar to the one in the image were seen on a formalin-ethyl acetate concentrate done on a child with abdominal pain. The child lives in...
- Summary and More Hints on Diagnosing Intestinal Worms
- Importance of Size
- Importance of Proper Specimen Collection
- All of the following are recommended fixatives for performing concentration techniques on stool specimens EXCEPT:
- This structure is seen when examining a direct wet prep. It measures approx. 98 x 60 µm. How would you identify it?
Level of Instruction: Intermediate
Intended Audience: Medical laboratory scientists, medical technologists, and technicians. This course is also appropriate for medical laboratory science students and pathology residents.
Author Information: Margaret Reinhart MS, MLS(ASCP), is a senior lecturer at the University of the Sciences where she has taught Human Parasitology since 1986. She was director of the Medical Laboratory Science Program from 1990-2020. She also did research on various aspects of Parasitology.
: Laurie Bjerklie, MA, MLS(ASCP)CM
is currently a Content Developer for MediaLab and LabCE. She has been
in higher education for over 14 years, has been a professor in both MLT and MLS
programs, and served as a Program Director.
Course information: This course is intended as an overview/review of the common helminth parasites that can typically be diagnosed from a stool specimen. The majority live in the intestines, although a few live in other organs, but their eggs can be found in the feces. The focus is on microscopic identification; some information on other diagnostic methods, life cycles, epidemiology, symptoms and treatment is also given.