Investigations of an extraordinary endocytobiont in Acanthamoeba sp.: development and replication

被引:0
作者
Patrick Scheid
Bärbel Hauröder
Rolf Michel
机构
[1] Central Institute of the Bundeswehr Medical Service Koblenz,Laboratory of Medical Parasitology
[2] Central Institute of the Bundeswehr Medical Service,Laboratory of Electron Microscopy
来源
Parasitology Research | 2010年 / 106卷
关键词
Keratitis; Food Vacuole; Francisella Tularensis; Haemine; Intracellular Organism;
D O I
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中图分类号
学科分类号
摘要
In this article, the results of investigations concerning a parasitic endocytobiont within the host amoebae (Acanthamoeba sp.) are presented. The endocytobiont was recently isolated from the contact lens and the inflamed eye of a patient with keratitis. Light microscopy and electron microscopy were performed to provide morphological details: Light microscopy revealed the presence of ovoid microorganisms developing and proliferating within the cytoplasm of the amoebic trophozoites. Details of the unusual development of these endocytobionts within the amoebae could be studied and demonstrated by means of electron microscopy. Foldings and morphological reorganization of the microorganisms took place exclusively within the host cytoplasm. The intracellularly aggregating organisms led to the rupture of the Acanthamoeba trophozoites after proliferation. Numerous microorganisms were released, which were infectious and were subsequently ingested by hitherto uninfected acanthamoebic trophozoites. To evaluate the in vitro growth of the isolated endocytobionts (without their hosts), they were transferred to several different culture plates. There was no growth of these unique organisms on five different common cultural plates suitable for the growth of bacteria and fungi.
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页码:1371 / 1377
页数:6
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