Bernd‐Alois Tenhagen

ORCID: 0000-0002-2191-7569
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About
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Research Areas
  • Antimicrobial Resistance in Staphylococcus
  • Antibiotic Resistance in Bacteria
  • Pharmaceutical and Antibiotic Environmental Impacts
  • Salmonella and Campylobacter epidemiology
  • Bacterial biofilms and quorum sensing
  • Microbial infections and disease research
  • Milk Quality and Mastitis in Dairy Cows
  • Probiotics and Fermented Foods
  • Bacterial Identification and Susceptibility Testing
  • Escherichia coli research studies
  • Reproductive Physiology in Livestock
  • Antibiotics Pharmacokinetics and Efficacy
  • Clostridium difficile and Clostridium perfringens research
  • Animal Behavior and Welfare Studies
  • Gut microbiota and health
  • Microbial Metabolism and Applications
  • Enterobacteriaceae and Cronobacter Research
  • Ruminant Nutrition and Digestive Physiology
  • Animal Nutrition and Physiology
  • Food Safety and Hygiene
  • Animal health and immunology
  • Veterinary medicine and infectious diseases
  • Genetic and phenotypic traits in livestock
  • Animal Disease Management and Epidemiology
  • Zoonotic diseases and public health

Federal Institute for Risk Assessment
2015-2024

University of Veterinary Medicine
2021

University of Veterinary Medicine Hannover, Foundation
2021

Agence Nationale de Sécurité Sanitaire de l’Alimentation, de l’Environnement et du Travail
2017

Freie Universität Berlin
2000-2015

Technical University of Denmark
2011

GTx (United States)
2006

Institut für Tier-, Natur- und Umweltethik
2004

A series of 100 Staphylococcus aureus isolates ascribed to sequence type 398 (ST398) and recovered from different sources (healthy carrier diseased pigs, dust pig farms, milk, meat) in Germany were investigated for their virulence antimicrobial resistance genetic background. Antimicrobial was determined by the disk diffusion method. Virulence determinants (37 31 genes, respectively) tested PCR. Only two profiles, including accessory gene regulator agrI three or four hemolysin-encoding...

10.1128/aem.02260-10 article EN Applied and Environmental Microbiology 2011-03-05

Since the first description of a plasmid-mediated colistin resistance gene (mcr-1) in November 2015 multiple reports mcr-1 positive isolates indicate worldwide spread this newly discovered Enterobacteriaceae. Although occurrence livestock, food, environment and human origin is well documented only few systematic studies on prevalence are available yet. Here, comprehensive data German livestock food presented. Over 10.600 E. coli from national monitoring zoonotic agents years 2010–2015 were...

10.1371/journal.pone.0159863 article EN cc-by PLoS ONE 2016-07-25

The objective of this study was to analyse the occurrence methicillin-resistant Staphylococcus aureus (MRSA) in three dairy herds southwest Germany that had experienced individual cases clinical and subclinical mastitis associated with MRSA. were identified by detection MRSA during routine resistance testing pathogens. All quarters all cows positive on California Mastitis Test sampled for bacteriological analysis two occasions. Bulk tank milk samples also tested. Furthermore, nasal swabs...

10.1111/j.1863-2378.2010.01344.x article EN Zoonoses and Public Health 2010-07-12

The presence of bacteria carrying antimicrobial resistance (AMR) genes in wildlife is an indicator that resistant human or livestock origin are widespread the environment. In addition, it could represent additional challenge for health, since wild animals act as efficient AMR reservoirs and epidemiological links between human, natural environments. aim this study was to investigate occurrence antibiotic patterns several bacterial species certain Germany, including boars (Sus scrofa), roe...

10.3389/fvets.2020.627821 article EN cc-by Frontiers in Veterinary Science 2021-01-27

The purpose of this longitudinal study was to describe the occurrence antibiotic resistance in faecal Escherichia coli isolated from pigs between birth and slaughter its association with treatment. Four objectives were addressed: comparison isolates a) treated vs. non-treated pigs, b) follow-up initial samples c) receiving treatments via different administration routes d) sows their piglets. Each addressed following groups used for treatment: beta-lactams, tetracyclines, polymyxins...

10.1016/j.prevetmed.2019.02.008 article EN cc-by-nc-nd Preventive Veterinary Medicine 2019-02-12

ABSTRACT The emission of microorganisms, especially resistant bacteria such as methicillin-resistant Staphylococcus aureus (MRSA), from poultry farms is public interest, and its occurrence relevance are controversially discussed. So far, there limited data on this issue. In study, we investigated the livestock-associated (LA)-MRSA inside outside previously tested MRSA-positive barns in Germany. total, five turkey two broiler fattening were four three times, respectively. a longitudinal study...

10.1128/aem.03939-12 article EN Applied and Environmental Microbiology 2013-02-16

Livestock-associated methicillin-resistant Staphylococcus aureus (LA-MRSA) have been isolated from a number of livestock species and persons involved in animal production. We investigated the prevalence LA-MRSA fattening turkeys people living on farms that house turkeys. Eighteen (90%) 20 flocks were positive for MRSA, 12 22 (37·3%) 59 sampled MRSA. People with frequent access to stables more likely be In most MRSA could assigned clonal complex (CC) 398 detected. five spa-type t002 is not...

10.1017/s095026881200009x article EN cc-by-nc-sa Epidemiology and Infection 2012-02-10

EFSA was requested to: 1) assess the risk for development of antimicrobial resistance (AMR) due to feeding on farm calves with colostrum potentially containing residues antibiotics; 2) AMR milk cows treated during lactation an antibiotic and milked withdrawal period, 3) propose possible options mitigate derived from such practices. Treatment dairy dry period is common in EU Member States. Penicillins, alone or combination aminoglycosides, cephalosporins are most commonly used. Residue levels...

10.2903/j.efsa.2017.4665 article EN cc-by-nd EFSA Journal 2017-01-01

The transmission of antimicrobial resistance (AMR) between food-producing animals (poultry, cattle and pigs) during short journeys (< 8 h) long (> directed to other farms or the slaughterhouse lairage (directly with intermediate stops at assembly centres control posts, mainly transported by road) was assessed. Among identified risk factors contributing probability antimicrobial-resistant bacteria (ARB) genes (ARGs), ones considered more important are status (presence ARB/ARGs) pre-transport,...

10.2903/j.efsa.2022.7586 article EN EFSA Journal 2022-10-01

Prevalence of mastitis pathogens in milk samples from dairy cows and heifers was studied over a period 1 year (Aug 2005–Aug 2006) ten herds Germany. Milk ( n =8240) were collected without clinical at parturition =6915), primiparous with =751) older =574). Coagulase negative staphylococci (CNS) the predominant group bacteria isolated (46·8% samples) clinically healthy quarters around parturition, followed by streptococci (12·6%), coliforms (4·7%) Staphylococcus aureus (4·0%). Thirty-three...

10.1017/s0022029908003786 article EN Journal of Dairy Research 2009-01-05

Abstract Background The purpose of this study was to investigate the prevalence MRSA in herds fattening pigs different regions Germany, and determine factors associated with occurrence pathogen. For pooled dust samples were collected, a questionnaire covered information regarding herd characteristics management practices. Samples pre-enriched high-salt medium followed by selective enrichment containing cefoxitin/aztreonam, culturing. Presumptive colonies confirmed multiplex-PCR targeting...

10.1186/1746-6148-7-69 article EN cc-by BMC Veterinary Research 2011-11-10

Livestock-associated methicillin-resistant Staphylococcus aureus (MRSA) have been found in various farm animal species throughout the world. It was objective of this study to estimate prevalence MRSA different cattle food chains (milk, beef, and veal) Germany, analyze diversity along each chain compare characteristics subtypes. Samples were collected between 2009 2012 from dairy herds (bulk tank milk), veal (dust stables), calves, beef at slaughter (nasal swabs) carcasses calves (surface...

10.2527/jas.2014-7665 article EN Journal of Animal Science 2014-04-29

Summary In 2009, 1462 Escherichia coli isolates were collected in a systematic resistance monitoring approach from primary production, slaughterhouses and at retail evaluated on the basis of epidemiological cut‐off values. Besides to antimicrobial classes that have been extensively used for long time (e.g. sulphonamides tetracyclines), (fluoro)quinolones third‐generation cephalosporins was observed. While poultry production chain majority (60%) laying hens susceptible all antimicrobials...

10.1111/j.1863-2378.2011.01451.x article EN Zoonoses and Public Health 2012-09-01
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