Breaking News
December 9, 2018 - Eliminating microglia can reverse some aspects of stress sensitization, study shows
December 9, 2018 - New genetic insight could help treat rare debilitating heart and lung condition
December 9, 2018 - MiRagen Therapeutics Announces Final Safety, Biodistribution and Clinical Efficacy Data From Phase 1 Cobomarsen Clinical Trial in Patients With Mycosis Fungoides
December 9, 2018 - Work with your doctor to weigh pros, cons of treatment options for hyperthyroidism
December 9, 2018 - CWRU researcher secures $14.6 million funding for genetic study into Alzheimer’s disease
December 9, 2018 - High intensity statin treatment and adherence could save more lives
December 9, 2018 - Surgery patients use only 1/4 of prescribed opioids, and prescription size matters
December 9, 2018 - AXT offers Phi Optics upgrade to QPI systems for inverted light microscopes
December 9, 2018 - New booklet could help improve conditions of young pupils with albinism
December 9, 2018 - Few Physicians Work in Practices That Use Telemedicine
December 9, 2018 - Older Adults and Oral Health
December 9, 2018 - Health utility values improve after septorhinoplasty
December 9, 2018 - New EU-funded project provides insight into how the brain develops
December 9, 2018 - Expanded use of tele-emergency services can help strengthen rural hospitals
December 9, 2018 - Infections in the Young May Be Tied to Risk for Mental Illness: Study
December 9, 2018 - Profile: Native Hawaiians and Pacific Islanders
December 9, 2018 - Snoring poses greater cardiac risk to women
December 9, 2018 - Researcher takes further steps in understanding how and why cute aggression occurs
December 9, 2018 - Researchers create new light-activated tools for controlling neurons
December 9, 2018 - Spinal cord injury disrupts the body’s internal clock, study shows
December 9, 2018 - Babies recognize nested structures similar to our grammar
December 9, 2018 - UT Austin researcher receives $2.5 million CZI grant for neurodegenerative disease research
December 9, 2018 - Sleep problems found to be prevalent and increasing among college students
December 9, 2018 - Study reveals why some children are susceptible to the effects of maltreatment
December 9, 2018 - Study investigates influence of different opioids on driving performance
December 9, 2018 - Jazz Pharmaceuticals Announces First Patient Enrolled in Phase 3 Clinical Trial Evaluating JZP-258 for the Treatment of Idiopathic Hypersomnia
December 9, 2018 - Eliminating microglia prevents heightened immune sensitivity after stress
December 9, 2018 - Boys with social difficulties are at greatest risk of early substance use
December 9, 2018 - ‘Wrong’ connective tissue cells linked to worse prognosis in breast cancer patients
December 8, 2018 - Chronic, refractory schizophrenia patients benefit from targeted cognitive training
December 8, 2018 - Advertising in kids’ apps more prevalent than parents may realize
December 8, 2018 - New way to trace the transmission histories of rare genetic diseases
December 8, 2018 - ASH: A+CHP Bests CHOP for Peripheral T-Cell Lymphoma
December 8, 2018 - Results of pediatric genomic epilepsy tests often reclassified
December 8, 2018 - New way of controlling HIV latency to completely eradicate the virus
December 8, 2018 - Phasefocus to showcase the Livecyte 2 at ASCB
December 8, 2018 - KHN’s ‘What the Health?’ Is health spending the next big political issue?
December 8, 2018 - Mussels take in microplastic pollution fibers and flush most of them out again
December 8, 2018 - AHA: How to Stop Smoking … for Good
December 8, 2018 - Scientists overturn odds to make Parkinson’s discovery
December 8, 2018 - Health benefits of producing marula vinegar
December 8, 2018 - Failure of critical cellular energy sensor responsible for CKD progression, study finds
December 8, 2018 - Ethnicity can be reliable indicator of gut microbiota diversity
December 8, 2018 - Safe Sleep for Baby | NIH News in Health
December 8, 2018 - Study looks at ways technology can support nutritional needs of Parkinson’s patients
December 8, 2018 - Infant milk allergy is being overdiagnosed say experts
December 8, 2018 - Graphene may one day be used to test for ALS
December 8, 2018 - Houston Methodist launches real-time website to track flu cases
December 8, 2018 - RedHill Announces Positive Top-Line Results from Confirmatory Phase 3 Study with Talicia for H. pylori Infection
December 8, 2018 - A way to measure obesity and health beyond BMI
December 8, 2018 - New diagnostic tools may help identify breast cancer patients who could benefit from targeted therapies
December 8, 2018 - Duke-NUS researchers highlight possible role of bioaerosol sampling in pandemic surveillance
December 8, 2018 - Study quantifies links between alcohol, drug use and violent deaths
December 8, 2018 - Mothers’ stress levels at conception linked to child’s response to life challenges at age 11
December 8, 2018 - MIT researchers develop antimicrobial peptides from South American wasp’s venom
December 8, 2018 - Obesity prevention among low-income, diverse preschool-aged children and parents
December 8, 2018 - Mount Sinai researcher awarded $2.5 million to advance understanding of neurodegenerative diseases
December 8, 2018 - CZI announces funding for open-source software efforts to improve image analysis in biomedicine
December 8, 2018 - New book encompasses the vast history of reproduction
December 8, 2018 - Low-income women in Texas are not receiving contraception after childbirth, study shows
December 8, 2018 - Study expands knowledge about sexuality and gender gaps in political attitudes
December 8, 2018 - Drug reduces hot flash frequency, improves quality of life in breast cancer survivors
December 8, 2018 - Imaging, Biopsy Often Still Needed After Mastectomy
December 8, 2018 - Physical Activity Guidelines for Americans: 2nd edition
December 8, 2018 - Machine learning can improve chemical toxicity prediction
December 8, 2018 - Researchers explore why and how Mediterranean diet may mitigate cardiovascular risk
December 8, 2018 - Multigene test is a helpful decision making tool in breast cancer treatment, study shows
December 8, 2018 - New EZ-2 centrifugal evaporator to safely remove solvents from cytotoxic drug preparations
December 8, 2018 - UMGCCC uses Gammapod radiotherapy to treat breast cancer patients
December 8, 2018 - Men with inflammatory bowel disease have higher prostate cancer risk
December 8, 2018 - Newly developed molecules may provide more reliable relief for people with autoimmune diseases
December 8, 2018 - Exercise program during adjuvant breast cancer treatment may provide cardiovascular benefits
December 8, 2018 - Acutely injured deceased-donor kidneys are suitable for transplant, study suggests
December 8, 2018 - Researchers find two connective tissue cells to be linked to worse prognosis of breast cancer
December 8, 2018 - VCU researchers test vaccine against opioid abuse
December 8, 2018 - An App, Your Fingernail — and Anemia Screening Is Done
December 8, 2018 - New study offers hope for patients suffering from a rare form of blindness
December 8, 2018 - Study finds increasing risk of infections and antibiotic prescriptions after hip fracture surgery
December 8, 2018 - Biosense Webster treats first patient in U.S. IDE study of HELIOSTAR RF Balloon Ablation Catheter
December 8, 2018 - Researchers develop new molecular tool to decode sugar-protein attachments
Vegetables and salad may include bacteria that are resistant to antibiotics

Vegetables and salad may include bacteria that are resistant to antibiotics

image_pdfDownload PDFimage_print

Salad is popular with people who want to maintain a balanced and healthy diet. Salad varieties are often offered for sale ready-cut and film-packaged. It is known that these types of fresh produce may be contaminated with bacteria that are relevant from the point of view of hygiene. A working group led by Professor Dr. Kornelia Smalla from the Julius Kühn Institute (JKI) has now shown that these bacteria may also include bacteria that are resistant to antibiotics.

“We have to get to the bottom of these findings”, said Professor Dr Georg Backhaus, President of the Julius Kühn Institute. Antimicrobial-resistant bacteria are known to occur in manure, sewage sludge, soil and bodies of water. “This worrying detection of these kinds of bacteria on plants is in line with similar findings for other foods”, adds Professor Dr Dr Andreas Hensel, President of the German Federal Institute for Risk Assessment (BfR). “We are now assessing as a matter of urgency what this finding means with regard to the health risk for consumers.”

Link: The transferable resistome of produce

For the purpose of analysis, the working group headed by Professor Smalla purchased mixed salads, arugula and cilantro in German supermarkets. The samples were then analyzed in order to determine the total quantity of transferable antimicrobial resistance genes (the researchers use the term “transferable resistome”) in Escherichia coli, a mostly harmless intestinal bacterium, on these foods. In their analyses, the experts focused on the part of Escherichia coli bacteria that are resistant to the active substance tetracycline. This is because tetracycline antibiotics are used in livestock farming, where they can promote the development and propagation of resistant bacteria in organs such as the intestine. These bacteria as well as part of the antibiotics are excreted and then find their way onto the fields via organic fertilizers like manure. Smalla says that “the results of the comprehensive tests clearly show that a wide variety of transferable plasmids – gene carriers in bacteria that occur outside the chromosomes – have been found with resistance genes in the E. coli from fresh produce. Each of these plasmids carries resistance to multiple classes of antibiotics. E. coli bacteria with these properties have been found on all three analysed foods.”

If these in themselves harmless bacteria occur on vegetable foods, they can enter the human intestine due to the consumption of raw vegetables. Once ingested, the bacteria can pass on their plasmids to any pathogenic bacteria that may be present in the intestine. This is known as horizontal gene transfer. In nature, horizontal gene transfer enables bacteria to rapidly adapt to changing environmental conditions. If a patient is treated with antibiotics, bacteria that have incorporated these kinds of transferable resistance genes into their genome have an advantage and multiply more than their less well-equipped competitors. Due to the low level of contamination of salad with E. coli, it is not known how frequently resistance genes are transferred in the human intestine. There is also little knowledge as to whether and to what extent diseases are caused by such resistant bacteria.

Consumers should always wash raw vegetables, leaf salad and fresh herbs thoroughly with drinking water before eating them in order to minimize the risk of ingestion of pathogens or antimicrobial-resistant bacteria.

Pregnant women and people with compromised immune systems as a result of advanced age, pre-existing conditions or medication intake should additionally refrain from eating pre-cut and packaged salads as a precaution against foodborne infections and should instead prepare salads themselves using fresh and thoroughly washed ingredients shortly before consumption.

However, washing alone is not sufficient to reliably remove the disease pathogens or antimicrobial-resistant bacteria that may be present on vegetable foods. Therefore, in rare individual cases it is necessary that especially immunocompromised persons heat vegetables and fresh herbs sufficiently (at least two minutes to 70°C inside the food) before consumption according to the instructions of their attending physicians.

Source:

https://www.bfr.bund.de/en/press_information/2018/40/resistant_bacteria__can_raw_vegetables_and_salad_pose_a_health_risk_-207788.html

Tagged with:

About author

Related Articles