User:Hsaeedm/Delftia lacustris/Bibliography

Annotated Bibliography- Huda Saeed
The research involving the genome sequencing reveals mechanisms for degradation in Delftia lacustris discusses a study that was performed on a strain found in the bacterium known as Strain LZ-C. Its known that Delftia is found in fresh lake water in Denmark and that the mechanisms in the bacterium help it perform pepidoglycan degradation. The purpose of this study was to see how the mechanisms of Delftia lacustris would react to heavy metals and salinity. The results of the study shows that the bacterium had a low tolerance to salinity and was only resistant to some metals. These metals included Cr(VI), Hg(II), Pb(II), and Cd(II). It was reveal that Delftia lacustris was also resistent to polycyclic aromatic hydrocarbons that included: naphthalene, 2-methylnaphthalene, benzene, toluene, and 2-methylnaphthalene.

Delftia lacustris is Gram-negative staining and has a metal rod shape. It was isolated from mesotrophic lake water in Denmark and is used to fresh water environments. Its function involved the peptidoglycan degradation. It also performs chitinase and lysozyme activites and uses monosaccharide, disaccharides, amino acids, organic acids to assist with degradation.

Since Delftia lacustris' mechanism involved degradation, studies are performed to see if it is able to degrade other substances found in water or pathogens in bodies to aid in pollution or sickness. A study was conducted testing to see if the removal of phenol and selenite from polluted water would be effective with the use of Delftia lacustris or the fungus, Phanerochaete chrysosporium. As a result, both Delftia lacustis and Phanerochaete chrysosporium were able to degrade phenol from the water but only at the 50mg/L concentration. They did not degrade phenol concentration 200mg/L. The purpose of this study was to use bacterium like Delftia lacustris to remove petroleum and oil from water to prevent side effects on the plants and animals close to that source of water.

This study focused on the control of different pathogens using different bacterium, including Delftia lacustris. The purpose of this study was to find a bacterium that could isolate the pathogens from tomato plants so that it could be used as a biocontrol agent. Several other factors were tested including hemolytic activity, response to antibiotics, and plant growth to account for how well the bacterium isolated the pathogens. Based on the results of the study, the tomato plants had a large amount of protection from pathogens when Delftia lacustris was used. There was also a record of high enzymatic activity occurring in the plants that had Delftia lacustris.

Delftia lacustris has the potential to cause human infection. There were four cases that involved infections by Delftia lacustris, which all included older or middle-aged men that were 40 years old or above. All patients had some sort of internal or external pain on their body including pain in the lungs, kidney, liver, and abdomen. Although Delftia lacustris is most known for pepidoglycan degradation," it has also been reported as a causative agent for nosocomial bacteremia, endocarditis, keratitis, and ocular infections".

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