Prevalence of CTX-M-Type extended-spectrum β-lactamases in Escherichia coli strains isolated in poultry farms.

The aim of the study was to detect the prevalence of CTX-M-type extended-spectrum β-lactamases (ESBL) in Escherichia coli strains isolated in healthy chickens at poultry farms in Tenerife, Spain. From November 2012 to February 2013, 260 live chickens were screened. Samples were cultured in chromogenic media.

Sustainable and effective control of trihalomethanes in the breakpoint chlorination of wastewater effluents.

The control of trihalomethanes (THMs) in waters subjected to chlorination is essential for protecting public health. However, the necessary means are not always available, especially in developing countries and regions. Under circumstances of scarce resources, one can utilize various means available for the control of THMs: a simple and affordable analytical method for testing of THMs, the study of the parameters tested routinely that could be used as indicators and the dose of chlorine used for the chlorination process.

Isolation of Salmonella serotypes in wastewater and effluent: Effect of treatment and potential risk.

The characteristics of strains of Salmonella isolated in wastewater were compared before and after treatment with activated sludge (conventional sewage treatment). Of the 21 strains studied, 11 came from raw wastewater and 10 from treated water. Our objective was to determine if the treatment affected all serotypes to the same extent, and whether it had an effect on the plasmidic composition and selection of resistances to antibiotics and disinfectants.

Evaluating trihalomethane content in drinking water on the basis of common monitoring parameters: regression models.

The presence of trihalomethanes (THMs) in potable-water sources is an issue of great interest because of the negative impact THMs have on human health. The objective of this study was to correlate the presence of trihalomethanes with more routinely monitored parameters of water quality, in order to facilitate THM control. Water samples taken at various stages of treatment from a water treatment plant were analyzed for the presence of trihalomethanes with the Fujiwara method.