Tag Archives: Salmonella

Livestock ‘not salmonella source’

BBC News 12 September 2013

Livestock may have been wrongly blamed as being the source of a type of drug-resistant salmonella, a study shows.  UK researchers examined the DNA from 373 humans and animals infected with a specific type of salmonella collected by a Scottish lab over 22 years.

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Researchers track antibiotic-resistant strains of Salmonella from farm to fork

(Penn State 29 August 2013) Continuing research on Salmonella may enable researchers to identify and track strains of antibiotic resistant bacteria as they evolve and spread, according to researchers in Penn State’s College of Agricultural Sciences.

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Probiotic bacterium lessens severity of Salmonella infections by hoarding iron

(University of California – Irvine 17 July 2013) UC Irvine microbiologists have learned how a probiotic bacterium used to treat irritable bowel syndrome can soothe gut bacterial infections caused by salmonella, paving the way for potential relief from foodborne illnesses that affect millions of people annually.

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Whole chickens from farmers markets may have more pathogenic bacteria

(Penn State 11 July 2013) Raw, whole chickens purchased from farmers markets throughout Pennsylvania contained significantly higher levels of bacteria that can cause foodborne illness compared to those purchased from grocery stores in the region, according to a small-scale study by researchers in Penn State’s College of Agricultural Sciences.

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Click here to download Masters Thesis - A Microbiological Comparison of Poultry Products Obtained From Farmers’ Markets and Supermarkets in Pennsylvania (170 pp)

Researchers develop a faster method to identify Salmonella strains

(Penn State 3 June 2013) A new approach may be able to reduce by more than half the time it takes health officials to identify Salmonella strains, according to researchers in Penn State’s College of Agricultural Sciences.

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Inhibition of polymerase chain reaction for the detection of Escherichia coli O157:H7 and Salmonella enterica on walnut kernels

Kyle Ganz & Alex Gill. Food Microbiology 35(1): 15-20 http://dx.doi.org/10.1016/j.fm.2013.02.002

The aim of this study was to determine whether Escherichia coli O157:H7 can be reliably detected and isolated from walnut kernels using standard methods of analysis. The limit of detection approached 1 cell per analytical unit (25 g) for E. coli O157:H7 on walnut kernels enriched in modified tryptic soy broth with 20 μg/ml novobiocin and plating onto selective agar media. The presence of PCR inhibitors in walnut kernels was indicated by the failure to detect E. coli O157:H7 from culture positive enrichment broths analysed by PCR, with two separate polymerase and reagent compositions (Dupont BAX E. coli O157:H7 MP system, Promega GoTaq Green for stx) and three methods of template preparation (DuPont BAX, Qiagen DNeasy, Bio-Rad InstaGene). PCR inhibition was overcome by 1:100 dilution in TE buffer of the DNeasy or InstaGene template. PCR inhibition was not relieved by dilution of the BAX template. Similar results were observed for walnut kernels inoculated with Salmonella enterica and analysed for invA, indicating that PCR inhibition is not specific to the organism or primer/template. These results indicate that analysis of walnut kernels for pathogens should be with culture based methods or use protocols for DNA template preparation modified to remove or dilute inhibitors and the need for internal amplification controls in PCR methods.

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HPA study shows poor hygiene practices at mobile vendors

Health Protection Agency 13 March 2013

Research from the Health Protection Agency (HPA) has revealed that food, water, chopping boards, cleaning cloths and security wristbands sampled from mobile and outdoor food vendors were contaminated with a range of bacteria including E.coli. This bacteria, which originates from human or animal faeces indicates either poor hygiene, undercooking or cross-contamination in the kitchen.

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The report can be found from the HPA website’s LG Regulation Reports page.

Vaccination responsible for dramatic fall in Salmonella infections

(University of Liverpool 16 January 2013) Mass poultry vaccination programs introduced to combat Salmonella infections have led to a dramatic fall in the number of cases since the late 1990s, according to a researcher at the University of Liverpool.

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New study sheds light on how Salmonella spreads in the body

(University of Cambridge6 December 2012) Findings of Cambridge scientists, published today in the journal PLoS Pathogens, show a new mechanism used by bacteria to spread in the body with the potential to identify targets to prevent the dissemination of the infection process.

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Dozens poisoned after eating raw almonds

ABC News 27 October 2012

About 30 people across the country have fallen ill with salmonella poisoning after eating what are believed to be contaminated raw almonds.

Woolworths has announced a national recall of its own brand of almonds.

The WA Health Department says three Western Australians are among the 30 people affected.

It says symptoms of salmonella poisoning include diarrhoea, fever and abdominal cramps.

It is urging anyone with symptoms to seek medical help.

Woolworths says they are recalling their own brand of almonds as a precaution.

The affected batches have best before dates of 05/02/13, 06/04/13, 07/04/13 or 12/04/13.

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View the Food Recall Notice from Woolworths