Parasite Information and Courses from MediaLab, Inc.
These are the MediaLab courses that cover Parasite and links to relevant pages within the course.
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| Identify the urine sediment element shown by the arrow: | View Page |
| The abnormal RBC indicated by the arrow in this illustration is indicative of: | View Page |
| This intestinal parasite, found in stool, measures 170 micro meters by 63 micro meters. | View Page |
| This parasite is found in blood. | View Page |
| This parasite resides in human intestine. | View Page |
| This suspicious form was found in stool. | View Page |
| Which of the following statements about Rickettsia is false: | View Page |
| Which one of the following statements about Coxiella burnetii is not true: | View Page |
| Which of the following parasites enters its host through ingestion of infected food: | View Page |
| Which of the following organisms is an obligate intracellular parasite: | View Page |
| The Iodine prep method is used to detect which of the following protozoan stages: | View Page |
| Which of the following would be considered the definitive host of a parasite: | View Page |
| Which of the following parasites is not commonly found in the peripheral blood: | View Page |
| Which one of the following parasites must migrate through the circulation before maturing in the portal venous system: | View Page |
| Which one of the following is not a true statement about Chlamydia: | View Page |
| Description of Specialties (1) Specialists in microbiology perform testing to diagnose and stop the spread of infectious organisms, including bacteria, viruses, and parasites. Specialists should be able to isolate and identify a wide variety of these organisms. Testing procedures include direction examination and antigen detection methods.
Specialists in serology and immunology measure antibodies to infectious organisms. Specialists should be familiar with all serology techniques (except those specific to immunohematology). This specialty includes all lab procedures performed in the specialty of histocompatibility.
Specialists in hematology must be able to identify and evaluate cells in blood and bone marrow and identify disorders of these cell. Specialists should be familiar with routine and special tests to determine the number, morphology, and function of cells in body fluid. | View Page |
| Fungal hyphae Tubular filaments of fungi called hyphae may also be seen in a direct smear. Hyphae stain Gram positive and may branch or intertwine. Parasites can also be identified with the Gram stain, although it is not as sensitive as the special stains used for parasites. The Gram stain reaction and appearance can be used to identify most cellular material seen in a direct smear. The crystal violet may precipitate and can be seen on the slide. If the stain has precipitated, it must be refiltered before use.
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| Intracellular RBC Inclusions-G6PD (continued) G6PD deficiency occurs in the same geographic distribution as malaria. It has been theorized that enzyme deficient cells are more resistant to malarial parasites than normal cells.When hemolysis is triggered, the appearance of the red blood cells is modulated by activity of the spleen.Spherocytes, schistocytes, and nucleated red blood cells may appear in the peripheral blood.Denatured hemoglobin removed by an active spleen may leave bite cells, identified by the arrows in this photomicrograph, suggesting the presence of G6PD deficiency. | View Page |
| Parasites which can be found in urinary sediment include all of the following EXCEPT: | View Page |
| Sudan III will confirm the presence of: | View Page |
| Match the following.Note: Answers may be used more than once. | View Page |
| Counting Elements Next the number of RBCs, WBCs, epithelial cells, parasites, and fat will be counted. Move to the center of the coverslip and examine 10 fields under high power (40x) brightfield. Use phase-contrast as needed. Determine the average number of each element found and record the findings as number per high power field (#/HPF). An abundance of any one element may be recorded as >100/HPF when 1/4 field is counted and the total field is estimated to be greater than 200/HPF. | View Page |
| Parasites Parasites which may be found in urinary sediments include Trichomonas vaginalis, Enterobius vermicularis and Schistosoma haematobium. It is also important to note that parasites and parasitic ova may be seen in urine sediments as a result of fecal or vaginal contamination. This slide shows examples of Trichomonas vaginalis. In the female, Trichomonas is usually found as a contaminant from vaginal infection and is often accompanied by an increase in the number of white cells. Trichomonas is highly motile, measuring 5 - 15 microns with a characteristic pear shape. It has multiple anterior flagella and the nucleus is often apparent. | View Page |
| Enterobius Vermicularis Pinworm Ova Another parasite which may be seen in urine is the Enterobius vermicularis (pinworm) ova. The ovum is ovoid in shape with one side flattened. The embryo is separated from the shell by a clear space. | View Page |
| Schistosoma Haematobium Ova The third parasite which may be seen is the Schistosoma haematobium ovum. This parasite is considered an important factor in the etiology of carcinoma of the bladder. The ova are elongated and are 60 X 160 microns. They are a yellowish color, slightly transparent, and possess a delicate terminal spine. | View Page |
| Select the letter representing the cell that may be seen in increased numbers in the peripheral blood smear in immediate hypersensitivity reactions: | View Page |