This paper describes how the technique of surface plasmon resonance (SPR) can be utilized to follow (in real time) the attachment of Pseudomonas aeruginosa bacteria on bare gold and gold modified with a self-assembled monolayer (SAM) of mercaptounadecanoic acid. We show that SPR is able to discriminate between the adsorption of live versus dead (thermally shocked) bacteria. Moreover, the SPR di...

Mycoplasma pneumoniae lacks a cell wall but has internal cytoskeleton-like structures that are assumed to support the attachment organelle and asymmetric cell shape of this bacterium. To explore the fine details of the attachment organelle and the cytoskeleton-like structures, a fluorescent-protein tagging technique was applied to visualize the protein components of these structures. The focus ...

Antibiotic resistance genes (ARGs) may be introduced to agricultural soil through the land application of cattle manure. During a rainfall event, manure-borne ARGs infiltrate into subsurface and leach groundwater. The objective this study was characterize model vertical transport following beef manure on surface. In study, column experiments were conducted evaluate influence four ARGs: erm(C), ...

Outer membrane vesicles (OMVs) of Gram-negative bacteria have been studied intensively in recent years, primarily in their role in delivering virulence factors and antigens during pathogenesis. However, the near ubiquity of their production suggests that they may play other roles, such as responding to envelope stress or trafficking various cargoes to prevent dilution or degradation by other ba...

In the present report, five selected periodontal patients were treated for 1 week with metronidazole. Two of the patients had their teeth scales and root-planed the week they received metronidazole. Prior to treatment, B. asaccharolyticus accounted for 41% of the cultivable isolates and the spirochetes averaged 29% of the microscopic count in plaque removed from each of four pockets per patient...

Stainless steel coupons were treated with skim milk and subsequently challenged with individual bacterial suspensions of Staphylococcus aureus, Pseudomonas fragi, Escherichia coli, Listeria monocytogenes, and Serratia marcescens. The numbers of attached bacteria were determined by direct epifluorescence microscopy and compared with the attachment levels on clean stainless steel with two differe...