Virulence and antimicrobial resistance factors in serotypes isolated from pigs and chickens in central Chile.

is a food-borne pathogen with a wide host-range that during decades has been of public health concern in developed and developing countries. In Chile, the poultry and pig industries represent the biggest contribution of meat consumption in the population, and sanitary regulations have been imposed for control. The aim of this work was to determine and characterize strains isolated from pigs and chicken raised on commercials farms in Chile.

Vaccination of Calves with the BCG Strain Induces Protection against Bovine Tuberculosis in Dairy Herds under a Natural Transmission Setting.

Bovine tuberculosis (bTB) is a zoonotic disease caused mainly by , which is associated with major economic losses for milk and meat producers. The objective of this trial was to assess the efficacy of the BCG Russia strain in a cohort study performed under field conditions, with the vaccination of calves in seven dairy farms from a high prevalence area in central Chile. The trial was performed with 501 animals, subcutaneously vaccinated with 2-8 × 10 colony-forming units of BCG, whilst 441 matched control animals received a saline placebo.

Phenotypic and Genotypic Characterization of Virulence Factors and Susceptibility to Antibiotics in Infantis Strains Isolated from Chicken Meat: First Findings in Chile.

Infantis is a zoonotic pathogen that causes gastroenteritis in humans and animals, with poultry being its main reservoir. In Chile, there are no data to characterize Infantis strains in poultry production. In this study, 87 Infantis strains were isolated from chicken meat for sale in supermarkets in Santiago, Chile, and characterized according to their virulence genes, biofilm formation abilities, antibiotic susceptibility, and resistance genes.

Capacity to adhere to and invade human epithelial cells, as related to the presence of virulence genes in, motility of, and biofilm formation of Campylobacter jejuni strains isolated from chicken and cattle.

Campylobacter jejuni is a zoonotic pathogen transmitted through the "farm to fork" route. Outbreaks are generally associated with the consumption of chicken meat; however, dairy cows, birds, wild and domestic food animals, and pets are other important sources. Currently, there are not enough data comparing the virulence of strains isolated from these reservoirs.