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  • 1
    Electronic Resource
    Electronic Resource
    The role of bacterial surface and substratum hydrophobicity in adhesion ofLeptospira biflexa serovarpatoc 1 to inert surfaces (1986)
    Springer
    Microbial ecology 12 (1986), S. 315-322 
    Details
    ISSN: 1432-184X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Adhesion of the hydrophilicLeptospira biflexa serovarpatoc 1 (L. patoc) was consistently greater on inert hydrophobic surfaces than on hydrophilic surfaces (glass and plastic). When inert substrata were coated with fetal calf serum (FCS) or bovine serum albumin fraction V (BSA), however, surface hydrophobicity was reduced compared to untreated surfaces, but adhesion ofL. patoc increased. The mechanism of adhesion at protein-coated surfaces is likely to be different than that at untreated surfaces, but it is suggested that the adhesion is nonspecific, as the level of adhesion is similar for different protein coatings. Increased adhesion to FCS- and BSA-coated surfaces was apparently not associated with substrate utilization (scavenging of fatty acids) from the coatings, as essentially fatty acid-free BSA-coated surfaces had similar levels of adhesion. The presence of FCS in the diluent lowered the adhesion ofL. patoc regardless of the original nature of the substratum. This may result from the mutual repulsion of the bacterium and the substratum caused by the exclusion volumes of similar macromolecules adsorbed to both surfaces from the FCS solution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02098572
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Bacterial scavenging: Utilization of fatty acids localized at a solid-liquid interface (1982)
    Springer
    Archives of microbiology 133 (1982), S. 257-260 
    Details
    ISSN: 1432-072X
    Keywords: Bacterial scavenging ; Surface localized nutrients ; Leptospira ; Serratia ; Hydrophobic interactions
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A model oligotrophic aquatic system involving localization of fatty acids on a solid surface was used to quantitate scavenging by three bacteria; Leptospira biflexa patoc 1 which adheres reversibly, pigmented Serratia marcescens EF190 which adheres irreversibly, and a non-pigmented hydrophilic mutant of EF190. The Leptospira and pigmented Serratia displayed two distinct scavenging strategies which are related to their different methods of adhesion. The Leptospira efficiently scavenged [1-14C] stearic acid from the surface in 24 h, whereas the pigmented hydrophobic Serratia initially showed a faster rate of removal but the overall rate was considerably slower than that of the Leptospira. The hydrophilic, non-pigmented Serratia required 50h incubation to remove significant amounts of the labelled fatty acid. The greater scavenging ability of the hydrophobic pigmented Serratia strain compared to the hydrophilic non-pigmented mutant could not be attributed to differences in viability of fatty acid metabolism. The hydrophobicity of the pigmented Serratia allows for firmer adhesion and greater interaction with the surface localized nutrients.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00521286
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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