ENTAMOEBA GINGIVALIS PDF

It is the first parasitic amoeba known to human beings. Smith and Barrett described it as causative agent of pyorrhoea alveolaris. Geographical distribution: E. It is estimated that in India more than 70 per cent population is infected by this parasite. With advancing age, the percentage of individuals suffering from the infection of E.

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Resources Causal Agents Entamoeba gingivalis is a non-pathogenic ameba that inhabits the human oral cavity and occasionally other sites. Although it is often found in conjunction with periodontal disease, no causative association has been definitively identified. Other human-infecting species of Entamoeba are discussed under Amebiasis and Intestinal Amebae.

Life Cycle View Larger There is no known cyst stage for Entamoeba gingivalis; trophozoites live in the oral cavity of humans, residing in the gingival pockets near the base of the teeth. They are not considered pathogenic, and feed on bacteria and other debris. Trophozoites are transmitted person-to-person orally by kissing or fomites such as eating utensils.

The trophozoite stage of E. The two should be differentiated, as both can be coughed up in sputum specimens if E. Geographic Range E. Clinical Presentation E. However, several studies have not definitely demonstrated any causative correlation.

It appears that diseased periodontal tissue and associated Actinomyces bacteria simply provide a favorable environment for the ameba to develop. Occasionally, E. Entamoeba gingivalis E. Trophozoites possess a single nucleus that contains a small, centrally-located karyosome and fine peripheral chromatin. The cytoplasm often contains ingested leukocytes, bacteria and other debris, very rarely red blood cells.

The trophozoites may also extend agranular pseudopodia while the main cell cytoplasm remains granular in appearance. Living specimens can move quickly. Figure A: Trophozoite of E. Figure B: Trophozoite of E. Figure C: Trophozoite of E. Figure D: Trophozoite of E. Note ingested host material such as epithelial cells and leukocytes arrow. Note ingested host material epithelial cells and leukocytes Figure E: Trophozoite of E. Laboratory Diagnosis Identification of E.

Two genetic sub types exist, the ST1 and ST2-kamaktli subtypes, though any clinical significance or morphologic differences between these two have not been investigated at the time of writing. As such, it is important to differentiate them from the morphologically-similar trophozoites of E. Standard precautions apply for the processing of sputum samples.

Suggested Reading Bradbury, R. Garcia, G. Prevalence of two Entamoeba gingivalis ST1 and ST2-kamaktli subtypes in the human oral cavity under various conditions. Parasitology Research 9 , pp. DPDx is an educational resource designed for health professionals and laboratory scientists. For an overview including prevention, control, and treatment visit www.

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Parasite Entamoeba Gingivalis: Life Cycle, Mode of Infection and Treatment

The use, distribution or reproduction in other forums is permitted, provided the original author s and the copyright owner s are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. Abstract The protozoan Entamoeba gingivalis resides in the oral cavity and is frequently observed in the periodontal pockets of humans and pets. This species of Entamoeba is closely related to the human pathogen Entamoeba histolytica, the agent of amoebiasis.

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Entamoeba gingivalis: características, taxonomía, morfología

Entamoeba gingivalis Gros, Entamoeba gingivalis from aggressive periodontal disease patient biofilm using phase contrast microscope x. It is recognizable through its dense core in the middle, formed by a central point encircled by a circular halo and surrounded by bigger phagosomes inside a greyish cytoplasm. Entamoeba gingivalis is an opportunistic Amoebozoa [ citation needed ] reported by some as an effect of disease; not a cause [hence status as a commensal] [2] [3] [4] and is the first amoeba in humans to be described. It is found in the mouth [5] inside the gingival pocket biofilm near the base of the teeth, and in periodontal pockets.

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