Toxigenic , and in oysters from the Gulf of Mexico and sold in Mexico City.

Oysters can accumulate potentially pathogenic bacteria, such as , and . The aim of this study was to detect the presence of these species and their toxigenic variants in oysters from the Gulf of Mexico sold in Mexico City. Oyster samples were studied using traditional culture and molecular polymerase chain reaction analysis.

Quantification of Vibrio species in oysters from the Gulf of Mexico with two procedures based on MPN and PCR.

Oysters can accumulate potentially pathogenic water bacteria. The objective of this study was to compare two procedures to quantify Vibrio species present in oysters to determine the most sensitive method. We analyzed oyster samples from the Gulf of Mexico, commercialized in Mexico City.

[Comparison of techniques for coliform bacteria extraction from sediment of Xochimilco Lake, Mexico].

The need to separate bacteria from sediment in order to appropriately count them has led to test the efficacy of different techniques. In this research, traditional techniques such as manual shaking, homogenization, ultrasonication, and surfactant are compared. Moreover, the possibility of using a set of enzymes (pancreatine) and an antibiotic (ampicillin) for sediment coliform extraction is proposed.