Influence of the Age of Free-Living Amoeba Cysts on Their Vertical Distribution in a Water Column

Опубликована: Янв. 17, 2024

Free-Living Amoebae (FLA) are widely distributed protozoa in both nature and artificial environments such as drinking water. Besides the ability of all FLA to transport various pathogenic microorganisms, certain species, Acanthamoeba spp. or Balamuthia mandrillaris, have intrinsic abilities cause severe cerebral infections. Previous work has shown an enrichment cysts biofilm developed upper levels Drinking Water Storage Towers (DWST), suggesting that differences densities may play a role their unequal distribution water column. To evaluate this hypothesis, model column was created for study used analyze vertical castellanii, Vermamoeba vermiformis mandrillaris from 0 23 weeks. Interestingly, our data showed A. castellanii V. were enriched during aging. However, B. equally entire study. These results that, besides level variation DWST, some can become less dense aging, which contributes water, thus levels.

Язык: Английский

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Encystment and Excystment Processes in Acanthamoeba castellanii: An Emphasis on Cellulose Involvement

Pathogens, Год журнала: 2025, Номер 14(3), С. 268 - 268

Опубликована: Март 10, 2025

The free-living amoeba Acanthamoeba castellanii is a unicellular eukaryote distributed in wide range of soil or aquatic environments, either natural human-made, such as rivers, lakes, drinking water, swimming pools. Besides its capacity to transport potential pathogens, bacteria viruses, spp. can have intrinsic pathogenic properties by causing severe infections at the ocular and cerebral level, named granulomatous amoebic encephalitis keratitis, respectively. During life cycle, A. alternates between vegetative mobile form, trophozoite, resistant, latent, non-mobile cyst. cyst wall double-layered, with an inner endocyst outer ectocyst, mainly composed cellulose proteins. resistance cysts many environmental stresses disinfection treatments has been assigned presence cellulose. current review aims present importance this glycopolymer further report pathways involved encystment excystment.

Язык: Английский

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Editorial for the Special Issue “Advances in Acanthamoeba”

Microorganisms, Год журнала: 2024, Номер 12(5), С. 865 - 865

Опубликована: Апрель 26, 2024

Some free-living amoebae can behave as opportunistic parasites, causing rare but dangerous diseases in humans and animals, primarily amoebic keratitis, with loss of vision, encephalitis, which is almost always fatal [...].

Язык: Английский

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