according to the definition by the national institutes of health of usa, a biological marker (biomarker) is a characteristic that is objectively measured and evaluated, as an indicator of normal biological processes, pathogenic processes or pharmacological responses, to a therapeutic agent. several studies have reported that a decreased regulating gene expression of biotinidase (btd) is associa...

Introduction: Microbial contamination prediction through detecting the indicator bacteria in natural waters is the first health and environmental step for preventing the transmission of water-associated diseases. This study was designed to determine the correlation between Escherichia coli as the indicator bacterium, on the one hand, and Salmonella and Shigella Spp. As the pathogenic bacteria, ...

Escherichia coli is an important pollution indicator and its pathogenic strains is a serious public health concern. A study was conducted to investigate the presence of E. coli and its pathogenic strain O157 in raw poultry meat and its antimicrobial sensitivity pattern to common antibiotics. Total number (n = 152) of samples were studied, out of which 25% (38/152) were found contaminated with E...

Microbiological monitoring of bivalve mollusc production areas by national or regional authorities is usually undertaken as part of a programme to classify the areas according to the perceived risk of the presence of pathogenic microorganisms based on the concentrations of faecal indicator bacteria present in the area. The indicator bacteria used are generally of the coliform group: total colif...

The detection of pathogenic microorganisms in aquatic environments is extremely relevant in terms of public health. As these laboratorial methodologies are usually difficult, expensive and time-consuming, they are frequently replaced by the assessment of fecal indicator bacteria, such as Escherichia coli. This study aimed to assess the presence of E. coli in fecal samples from Neotropical otter...

The Ba(OH)2 indicator system was demonstrated to be a practical procedure in assisting clinical bacteriologists in the accurate and rapid identification of the pathogenic Neisseria from clinical specimens. This system measured the release of CO2, resulting from the metabolism of fermentable carbohydrate, as the precipitated BaCO3, by means of a spectrophotometer, The method was uncomplicated an...