Quorum sensing plays a key role in the behavior of many bacteria and is carried out by a wide diversity of secreted molecules and their receptors. In this issue, Swem et al. (2008) provide a detailed site-specific analysis of the functioning of the quorum-sensing receptor LuxN from Vibrio harveyi.

Mycobacterium avium subsp. paratuberculosis is a slowly growing mycobacterial species, requiring 6 to 8 weeks of culture before colonies can be counted visually. Here, we describe the development of luminescent M. avium subsp. paratuberculosis expressing luxAB genes of Vibrio harveyi and its use for vaccine testing in an experimental mouse model, replacing fastidious CFU counting by rapid lumin...

RNA extracted from the luminescent bacterium Vibrio harveyi was translated in an Escherichia coli system. RNA from highly luminescent cells produced both alpha and beta subunits of luciferase in vitro, as confirmed by immunoprecipitation and partial proteolysis. RNA from cells before induction of luminescence did not direct luciferase synthesis.

The fish gut microbiota plays an important role in overall health. However, few reports have described the changes composition of following infection with pathogenic bacteria olive flounder (Paralichthys olivaceus). Here, we reported after treatment each three (Edwardsiella tarda, Streptococcus iniae, and Vibrio harveyi). Edwardsiella tarda decreased relative abundance Verrucomicrobia increased...

Abstract. Bahry MS, Radjasa OK, Trianto A. 2021. Potential of marine sponge-derived fungi in the aquaculture system. Biodiversitas 22: 2883-2892. Organic waste from is one triggers disease outbreaks and a decrease water quality that urgently needs to be resolved. Indonesia has high diversity sponges including their associated microorganisms potential field biotechnology. This study aimed determ...

Luminous bacteria in seawater around the islands of Bahrain are predominantly Vibrio harveyi and have the capability to adhere to artificial fibrous surfaces. Phytoplankton did not appear to have any specific relationship with luminous bacteria, but macroalgae were shown to possess an enhanced concentration of luminous bacteria.

UNLABELLED Sponges are a rich source for investigation of bioactive small molecules. They have been mostly investigated for the search of new pharmacological models or therapeutic agents for the treatment of human diseases. Micro-organisms can also represent a virulent pathogen for marine invertebrates such as sponges, which need to protect themselves against these microbes. Sponges' self defen...

The phenotypic characterization and antibiotic susceptibility patterns of 72 environmental isolates of Vibrio spp. collected from six aquaculture sites along the west coast of Sabah, Borneo, Malaysia was investigated. Up to 21 conventional biochemical tests were carried out and the sensitivity of the isolates against 16 antibiotics were tested using the disk diffusion method. In the present stu...

Quorum sensing (QS) refers to the ability of bacterial populations to read out the local environment for cell density and to collectively activate gene expression. Vibrio harveyi, one of the best characterized model organisms in QS, was used to address the question how single cells behave within a QS-activated community in a homogeneous environment. Analysis of the QS-regulated bioluminescence ...