Influence of ionic strength and pH on hydrophobicity and zeta potential of Giardia and Cryptosporidium

Hsu, Bing-Mu; Huang, Chihpin

doi:10.1016/s0927-7757(01)01009-3

Cited by 80 publications

(77 citation statements)

References 14 publications

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“…The environmental conditions, such as pH, ionic strength, temperature and components in solution can influence cell surface characteristics [22], e.g. surface charge and hydrophobicity [23]. Moreover, ionic strength determines the thickness of the electrical double layer which has a direct influence on electrostatic interactions established in the adhesion events [24].…”

Section: Discussionmentioning

confidence: 99%

Adhesion of Candida albicans and Candida dubliniensis to acrylic and hydroxyapatite

Henriques

Azeredo

Oliveira

2004

Colloids and Surfaces B: Biointerfaces

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The aim of this work was to compare the ability of strains of Candida albicans and Candida dubliniensis to adhere to acrylic and hydroxyapatite (HAP). In order to interpret the adhesion results, the surface properties of cells and materials were determined. Surface tension components (polar and apolar) and hydrophobicity were calculated through contact angle measurement and the elemental composition was determined by X-ray photoelectron spectroscopy (XPS). The results showed no significant differences in the number of adhered cells of both species to acrylic and hydroxyapatite. This was corroborated by the similarities in their surface properties and elemental composition. For both species, the adhesion to acrylic increased in the presence of artificial saliva due to the increase in the electron-donor capacity of this material. In the absence of artificial saliva, the number of adhered cells to HAP was greater than to acrylic, on account of the higher number of electron-donor groups of HAP. Hydrophobicity played a minor role in the adhesion process of both candidal species. Conversely, Lewis acid-base interactions seamed to govern this phenomenon.

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Section: Discussionmentioning

confidence: 99%

Adhesion of Candida albicans and Candida dubliniensis to acrylic and hydroxyapatite

Henriques

Azeredo

Oliveira

2004

Colloids and Surfaces B: Biointerfaces

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“…C. parvum oocysts are spherical biological colloids with a surface composed of a complex matrix of glycoproteins (6,14). Oocysts have a negative surface charge under typical environmental conditions (5,6,8,13,14,24,32), likely due to the presence of carboxylate, carboxylic, and phosphate groups on the oocyst surface (14). Both steric and electrostatic forces can play a role in oocyst association with suspended particles.…”

mentioning

confidence: 99%

Association of Cryptosporidium parvum with Suspended Particles: Impact on Oocyst Sedimentation

Searcy

Packman

Atwill

et al. 2005

Appl Environ Microbiol

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The association of Cryptosporidium parvum oocysts with suspended particles can alter the oocysts' effective physical properties and influence their transport in aquatic systems. To assess this behavior, C. parvum oocysts were mixed with various suspended sediments under a variety of water chemical conditions, and the resulting settling of the oocysts was observed. Direct microscopic observations showed that oocysts attached to suspended sediments. Settling column and batch experiments demonstrated that oocysts are removed from suspension at a much higher rate when associated with sediments. The rate of oocyst sedimentation depended primarily on the type of sediment with which the oocysts were mixed. Changes in background water conditions had a relatively small impact on the extent of oocyst-particle association and the resulting oocyst deposition. We believe that the ubiquitous association of C. parvum oocysts with suspended particles enhances the sedimentation of oocysts in natural waters and that this interaction should generally be considered when predicting the migration of pathogens in the environment.

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“…Cryptosporidium oocysts in water at neutral pH are, on average, -17 and -38 mV, respectively (Hsu & Huang, 2002), the mechanism for charge neutralization of proteins natural coagulant could act in the removal of protozoan parasites.…”

Section: Results Obtained In Coagulation/flocculation Process With Momentioning

confidence: 99%

Application of Hybrid Process of Coagulation/Flocculation and Membrane Filtration for the Removal of Protozoan Parasites from Water

Nishi¹,

Vieira²,

Falavigna-Guilherme³

et al. 2013

Water Treatment

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Influence of ionic strength and pH on hydrophobicity and zeta potential of Giardia and Cryptosporidium

Cited by 80 publications

References 14 publications

Adhesion of Candida albicans and Candida dubliniensis to acrylic and hydroxyapatite

Adhesion of Candida albicans and Candida dubliniensis to acrylic and hydroxyapatite

Association of Cryptosporidium parvum with Suspended Particles: Impact on Oocyst Sedimentation

Application of Hybrid Process of Coagulation/Flocculation and Membrane Filtration for the Removal of Protozoan Parasites from Water

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