From hatch to egg grading: monitoring of Salmonella shedding in free-range egg production systems
In this study, two free-range flocks were sampled from hatch to the end of production. At hatch, all chicks wereSalmonella negative and remained negative during rearing. During production, the proportion of positive samples was low on both farms.Salmonella positive samples were detected intermittently for Flock A. Dust, nest box, and egg belt swabs had the highest proportion of positive samples and highest overall loads ofSalmonella. The egg grading floor was swabbed at different points following the processing of eggs from Flock A. Only the suction cups that handle eggs prior to egg washing tested positive forSalmonella. Swabs collected from machinery handling eggs after washing wereSalmonella negative. During production, positive samples from Flock B were observed at only single time point. Dust has been implicated as a source ofSalmonella that can lead to flock to flock contamination. Bulk dust samples were collected and tested forSalmonella. The proportion of positive dust samples was low and is likely due to physical parameters which are not likely to support the survival ofSalmonella in the environment.
Publication date: Available online 21 November 2019Source: Food ControlAuthor(s): Ling Jin, Ting Li, Bin Wu, Tan Yang, Dengchao Zou, Xuehua Liang, Liwen Hu, Ganhui Huang, Jinsheng ZhangAbstractEstablishing an efficient and rapid detection method to monitor and control Salmonella is of great significance for ensuring food safety. Here we prepared a new time domain nuclear magnetic resonance (TD-NMR) biosensor based on superparamagnetic nanoparticle (SMN) with ultrasmall particle size and applied it for the detection of Salmonella in milk samples by TD-NMR. The free biotinylated antibody specifically binds to the Salmonella ...
Pneumococcal conjugate vaccine use in children has led to sharp declines in pneumococcal disease among adults and children.
The Food and Drug Administration approved tafenoquine for prophylaxis of malaria and antirelapse therapy.
In 2010, the overall upward trend in obesity prevalence turned downward among children aged 2-4 years enrolled in WIC, the Special Supplemental Nutrition Program for Women, Infants, and Children.
In this report, CDC analyzed traumatic brain injury-related death data from the National Vital Statistics System over an 18-year period (2000-2017).
During November 2017-March 2019, a multistate outbreak of Salmonella Reading involving 356 cases in 42 states occurred.
Publication date: Available online 21 November 2019Source: Food Research InternationalAuthor(s): Paula Vasconcelos Costa, Luiza Vasconcellos, Ingrid Camelo da Silva, Valéria de Mello Medeiros, Stephen James Forsythe, Marcelo Luiz Lima BrandãoAbstractThe aim of this study was to evaluate the microbiological quality of 45 samples of corn-based farinaceous foods commercialized in Brazil. The bacteriological analysis performed were: detection of Salmonella and Cronobacter, and enumeration of faecal coliforms and Bacillus cereus. The Cronobacter isolates were phenotypically characterized by Vitek 2.0 and the antib...
Foodborne Pathogens and Disease, Ahead of Print.
The pleiotropic host resistance factor SLC11A1 (NRAMP1) defends against diverse intracellular pathogens in mammals by yet-unknown mechanisms. We compared Salmonella infection of coisogenic mice with different SLC11A1 alleles. SLC11A1 reduced Salmonella replication and triggered up-regulation of uptake systems for divalent metal cations but no other stress responses. SLC11A1 modestly diminished iron availability and acutely restricted Salmonella access to magnesium. Growth of Salmonella cells in the presence of SLC11A1 was highly heterogeneous and inversely correlated with expression of the crucial magnesium transporter gen...