Publications by authors named "Gomez-Baltazar A"
There is a lack of information about Salmonella enterica strains under acidic conditions and their association with their genome. This study characterized intraspecies variability in the growth of 167 S. enterica isolates under two acid conditions (pH 4 and 5) and linked to the whole genome sequencing (WGS) data.
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- Researchers studied the genomic diversity of non-typhoidal Salmonella in raw chicken across three central Mexican states, analyzing 192 strains collected from various retail sources using whole-genome sequencing.
- Among the twenty identified serovars, Infantis, Schwarzengrund, and Enteritidis were the most prevalent, with variations in serovar distribution and antimicrobial resistance (AMR) genes linked to different states, years, seasons, and retail establishments.
- The study found a total of 145 virulence genes and classified strains into 32 virulotypes, linking several strains to significant SNP clusters that matched global isolates, providing insights for Salmonella epidemiology and risk management strategies.
Article Synopsis
- The study investigates the population structure and antimicrobial resistance (AMR) genes in a common foodborne pathogen found in Mexico, analyzing 2,561 strains.
- Key sources of these strains include food (44.28%), the environment (27.41%), animals (24.83%), and humans (3.48%), highlighting the importance of food safety.
- The research identifies prevalent serovars, frequent sequence types, and 78 AMR genes across various classes, offering critical data for public health strategies to combat foodborne diseases and enhance genomic monitoring.
Salmonella enterica genotypic and phenotypic characteristics play an important role in its pathogenesis, which could be influenced by its origin. This study evaluated the association among the antimicrobial resistance, virulence, and origin of circulating S. enterica strains in Mexico, isolated from foods, humans, and the environment.
View Article and Find Full Text PDFSalmonella enterica Typhimurium represents one of the most frequent causal agents of food contamination associated to gastroenteritis. The sequence type ST19 is the founder and worldwide prevalent genotype within this serotype, but its replacement by emerging genotypes has been recently reported. Particularly, the ST213 genotype has replaced it as the most prevalent in clinical and contaminated food samples in Mexico and has been recently reported in several countries.
View Article and Find Full Text PDFThe replacement of the most prevalent Salmonella enterica genotypes has been documented worldwide. Here we tested the hypothesis that the current prevalent sequence type ST213 of serotype Typhimurium in Mexico has a higher resistance to stressful food preservation conditions than the displaced sequence ST19. ST19 showed higher cell viability percentages than ST213 in osmotic (685 mM NaCl) and acidic (pH 3.
View Article and Find Full Text PDFIntroduction: The use of p,p'-dichlorodiphenyltrichloroethane (DDT) has been banned since the late 1970s due to its toxicity. However, its long half-life makes it persistent in the environment and, consequently, almost everyone has DDT residues in the body. Human milk constitutes an ideal non-conventional matrix to investigate environmental chronic exposure to organochlorine compounds (OCs) residues.
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