Publications by authors named "Luiz Augusto do Amaral"
Article Synopsis
- The study investigated contamination in raw milk and cheese from small farms in Brazil, focusing on various pathogenic bacteria and their characteristics.
- Pathogenic strains, including EPEC, STEC, and ExPEC, were found in both milk and cheese, with high antimicrobial resistance to several common antibiotics.
- Genetic analysis showed that identical virulence genes appeared at different production stages, indicating widespread contamination risks and the urgent need for improved hygiene practices.
Methicillin-resistant spp. (MRS) have been identified in several foods, including dairy products. Studies are needed about their occurrence and genetic diversity in the dairy production chain in order to gain a better understanding of their epidemiology and control.
View Article and Find Full Text PDFAntimicrobial Resistance and Virulence Factors of Escherichia coli in Cheese Made from Unpasteurized Milk in Three Cities in Brazil.
Foodborne Pathog Dis
September 2016
The production of cheeses from unpasteurized milk is still widespread in Brazil, even with a legal ban imposed on its marketing. The manufacture of this cheese is a public health problem, due to the use of raw milk and the poor hygienic conditions throughout the supply chain process. Contamination may occur from several sources and involve several different pathogenic microorganisms, such as Escherichia coli.
View Article and Find Full Text PDFObjective: To assess the sanitary quality of drinking water in rural farms through counts of microbiological indicators.
Methods: A total of 180 drinking water samples from sources, reservoirs and water from site of consumption were collected in 30 rural farms located in the northeast region of the sate of São Paulo. The most probable number of total coliforms, Escherichia coli and mesophilic microorganisms were determined.