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Chapter 1 : Intestinal Protozoa

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Intestinal Protozoa, Page 1 of 2

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Abstract:

This section describes the usefulness of patient symptoms and history, as well as laboratory findings, in the diagnosis of infection with an intestinal protozoan. Pathogenic intestinal protozoa discussed in the section include amebae, flagellates, ciliates, coccidia, and microsporidia. , which may cause amebic dysentery, is the most pathogenic of the intestinal amebae and may cause extraintestinal infections, especially liver abscesses, as well as gastrointestinal disease. When parasite is present in the absence of other pathogens, it is likely to be the cause of gastrointestinal symptom. The only pathogenic ciliate, in the phylum , is , the largest protozoan parasite known to cause gastrointestinal infections in humans. Pigs act as reservoirs of infection for this uncommon parasite. The traditional method used to diagnose amebiasis, giardiasis, or balantidiasis is the routine microscopic examination for the presence of characteristic trophozoites and cysts of the parasite in stained and unstained preparations of fecal specimens. It is imperative that microscopic preparations be examined by experienced and well trained medical technologists (clinical laboratory scientists). causes self-limited diarrhea in immunocompetent individuals but often causes intractable diarrhea in immunocompromised hosts, especially in AIDS patients. Microsporidia cause opportunistic infections in immunocompromised individuals. They produce tiny spores, which are difficult to detect. Methods of detection include electron microscopic examination of tissue specimens, histological techniques, and a modification of the trichrome stain. A number of drugs are available to treat patients infected with pathogenic intestinal protozoa.

Citation: Heelan J. 2004. Intestinal Protozoa, p 1-51. In Cases in Human Parasitology. ASM Press, Washington, DC. doi: 10.1128/9781555817664.ch1
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Citation: Heelan J. 2004. Intestinal Protozoa, p 1-51. In Cases in Human Parasitology. ASM Press, Washington, DC. doi: 10.1128/9781555817664.ch1
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Citation: Heelan J. 2004. Intestinal Protozoa, p 1-51. In Cases in Human Parasitology. ASM Press, Washington, DC. doi: 10.1128/9781555817664.ch1
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Citation: Heelan J. 2004. Intestinal Protozoa, p 1-51. In Cases in Human Parasitology. ASM Press, Washington, DC. doi: 10.1128/9781555817664.ch1
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Citation: Heelan J. 2004. Intestinal Protozoa, p 1-51. In Cases in Human Parasitology. ASM Press, Washington, DC. doi: 10.1128/9781555817664.ch1
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Citation: Heelan J. 2004. Intestinal Protozoa, p 1-51. In Cases in Human Parasitology. ASM Press, Washington, DC. doi: 10.1128/9781555817664.ch1
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Citation: Heelan J. 2004. Intestinal Protozoa, p 1-51. In Cases in Human Parasitology. ASM Press, Washington, DC. doi: 10.1128/9781555817664.ch1
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Citation: Heelan J. 2004. Intestinal Protozoa, p 1-51. In Cases in Human Parasitology. ASM Press, Washington, DC. doi: 10.1128/9781555817664.ch1
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Citation: Heelan J. 2004. Intestinal Protozoa, p 1-51. In Cases in Human Parasitology. ASM Press, Washington, DC. doi: 10.1128/9781555817664.ch1
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Citation: Heelan J. 2004. Intestinal Protozoa, p 1-51. In Cases in Human Parasitology. ASM Press, Washington, DC. doi: 10.1128/9781555817664.ch1
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Citation: Heelan J. 2004. Intestinal Protozoa, p 1-51. In Cases in Human Parasitology. ASM Press, Washington, DC. doi: 10.1128/9781555817664.ch1
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Citation: Heelan J. 2004. Intestinal Protozoa, p 1-51. In Cases in Human Parasitology. ASM Press, Washington, DC. doi: 10.1128/9781555817664.ch1
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Citation: Heelan J. 2004. Intestinal Protozoa, p 1-51. In Cases in Human Parasitology. ASM Press, Washington, DC. doi: 10.1128/9781555817664.ch1
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Citation: Heelan J. 2004. Intestinal Protozoa, p 1-51. In Cases in Human Parasitology. ASM Press, Washington, DC. doi: 10.1128/9781555817664.ch1
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