Parasitic Information and Courses from MediaLab, Inc.
These are the MediaLab courses that cover Parasitic and links to relevant pages within the course.
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| Eosinophilia is commonly found in which of the following disorder(s): | View Page |
| The iodine prep is most helpful to identify which of the following parasitic stages: | View Page |
| Mott Cell Another rare but abnormal type of plasma cell is the Mott cell (morula cell). The compartments visible in the cytoplasm are immunoglobulins which have not been released. Mott cells may be seen in parasitic infections and malignant tumors. | View Page |
| Match functions with the corresponding cells. | View Page |
| Match the characteristics with the cells. | View Page |
| Eosinophils in Parasitic Infections and Allergic Reactions Eosinophils are active in parasitic infections and in allergic reactions such as asthma and hay fever, and may be present in great numbers in the peripheral blood during these conditions.Stress, shock, or burns may also cause an increase in this type of cell.Eosinophils modulate an allergic response by liberating substances which can neutralize mast cell and basophil products. | View Page |
| Eosinophils are increased in all of the following conditions EXCEPT: | View Page |
| The photograph is representative of the peripheral blood smear of a five-month-old immigrant from Asia. Her mother was concerned that the child was not eating well. Her spleen was palpable.The hemogram revealed the following:Hb 9.6g/dL (normal 12.0 - 16.0 g/dL)RBC 5.48 X 1012/L (normal 4.2 - 5.9 X 1012/LHCT 30.4% (normal 37 - 48%)MCV 55.4 fl (normal 86 - 98 fl)MCH 17.5 pg (normal 27 - 32 pg)MCHC 31.6 g/dL (normal 31 - 37 g/dL)RDW 34.9% (normal 11 - 15%)Reticulocyte count 10.9% (normal 0.5 - 1.5%)Select the most likely diagnosis based on the clinical information and peripheral blood findings. | 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 |
| Select the letter representing the cell that may be seen in increased numbers in the peripheral blood smear in immediate hypersensitivity reactions: | View Page |
| Eosinophilia Follow-Up As mentioned on the previous page, high percentages of eosinophils may be present in the peripheral blood smears of patients with a variety of conditions--asthma, urticaria, Loeffler's syndrome, larval parasitic infections and in chronic eosinophilic leukemia. One exception to the association of eosinophilia with parasitic infections is a fatal case of disseminated strongyloidiasis reported many years ago by Miale (Hematology--5th Edition, Mosby, pg. 776, 1977) in which the peripheral blood eosinophilia was masked by the administration of corticosteroids. | View Page |
| The peripheral blood smear presented here was submitted for morphological/clinical review. Conditions in which this picture may be seen include: | View Page |
| Eosinophil description The cytoplasm of eosinophils is evenly filled by numerous orange-red granules of uniform size. They do not overlie the nucleus.The eosinophil granules contain numerous enzymes including peroxidase, phospholipase D, catalase, acid phosphatase, and vitamin B12-binding proteins.Their ability to kill bacteria is less than that of neutrophils. Their main purpose is to counteract parasitic infections and to participate in immune allergic reactions.They may also be increased in a variety of nonimmunologic inflammatory responses from bacteria and fungi causing chronic infections. Malignancies, collagen vascular diseases, and myeloproliferative disorders may also may be settings for prominent eosinophils. | View Page |