Bacteriology
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A specialized branch of microbiology, bacteriology is the study of bacteria and the infections and disease conditions they cause.
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New research on Pseudomonas aeruginosa from L. Steindler and co-authors summarized
2009 AUG 25 - (NewsRx.com) -- According to a study from Padriciano, Italy, "Pseudomonas aeruginosa possesses three quorum-sensing (QS) systems which are key in the expression of a large number of genes, including many virulence factors. Most studies of QS in P. aeruginosa have been performed in clinical isolates and have therefore focused on its role in pathogenicity. P. aeruginosa, however, is regarded as a ubiquitous organism capable of colonizing many different environments and also of establishing beneficial associations with plants." "In this study we examined the role of the two N-acyl homoserine lactone systems known as RhlI/R and LasI/R in the environmental rice rhizosphere isolate P. aeruginosa PUPa3. Both the Rhl and Las systems are involved in the regulation of plant growth-promoting traits. The environmental P. aeruginosa PUPa3 is pathogenic in two nonmammalian infection models, and only the double las rhl mutants are attenuated for virulence. In fact it was established that the two QS systems are not hierarchically organized and that they are both important for the colonization of the rice rhizosphere," wrote L. Steindler and colleagues. The researchers concluded: "This is an in-depth genetic and molecular study of QS in an environmental P. aeruginosa strain and highlights several differences with QS regulation in the clinical isolate PAO1.." Steindler and colleagues published their study in Applied and Environmental Microbiology (LasI/R and RhlI/R Quorum Sensing in a Strain of Pseudomonas aeruginosa Beneficial to Plants. Applied and Environmental Microbiology, 2009;75(15):5131-5140). For more information, contact V. Venturi, International Center Genetics Engineering & Biotechnology, Bacteriology Group, Area Science Pk, Padriciano 99, I-34012 Trieste, Italy. Publisher contact information for the journal Applied and Environmental Microbiology is: American Society Microbiology, 1752 N St. NW, Washington, DC 20036-2904, USA. Keywords: Italy, Padriciano, Pseudomonas aeruginosa. This article was prepared by Life Science Weekly editors from staff and other reports. Copyright 2009, Life Science Weekly via NewsRx.com.
Bacteriology Research
Bactriologic research focuses on bacteristasis, the inhibition of bateria growth or metabolism. Some viruses act as bacteriophages, infecting bacterial cells and killing them (phagocytosis). Another focus is on bacteriotropins or antibodies that develop as part of immunization and make the bacteria cells more subsceptible to phagocytosis.
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