Rikke Heidemann Olsen

Search results

• 2025

  Environmental concentrations of antibiotics induced polymyxin B tolerance in Aeromonas hydrophila

  Zhang, Y., Qiu, X., Xu, L., Olsen, R. H., Meng, H. & Li, L., 2025, In: Science of the Total Environment. 959, 9 p., 178247.

  Research output: Contribution to journal › Journal article › Research › peer-review
• 2024

  Phenothiazine Derivatives: The Importance of Stereoisomerism in the Tolerance and Efficacy of Antimicrobials

  Ronco, T., Juul, M., Reynier, Z., Christensen, J. B., Svenningsen, S. & Olsen, R. H., 2024, In: Indian Journal of Microbiology. 64, 2, p. 743–748 6 p.

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• 2023

  Antimicrobial Activity of Sertraline on Listeria monocytogenes

  Wang, Y., Li, L., Cai, P., Olsen, R. H., Peng, S. & Meng, H., 2023, In: International Journal of Molecular Sciences. 24, 5, 4678.

  Research output: Contribution to journal › Journal article › Research › peer-review

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  6 Citations (Scopus)

• Dramatic increase in slaughter condemnations due to Escherichia coli ST23 and ST101 within the Danish broiler production

  Kromann, S., Baig, S., Olsen, R. H., Edslev, S. M., Thøfner, I., Bojesen, A. M., Jensen, H. E. & Stegger, M., 2023, In: Veterinary Microbiology. 280, 109696.

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  2 Citations (Scopus)

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• Efflux Pumps and Different Genetic Contexts of tet(X4) Contribute to High Tigecycline Resistance in Escherichia fergusonii from Pigs

  Wang, J., Wan, X., Meng, H., Olsen, R. H., Chen, X. & Li, L., 2023, In: International Journal of Molecular Sciences. 24, 8, 10 p., 6923.

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• Inhibition of Plasmid Conjugation in Escherichia coli by Targeting rbsB Gene Using CRISPRi System

  Xiao, Y., Zhang, Y., Xie, F., Olsen, R. H., Shi, L. & Li, L., 2023, In: International Journal of Molecular Sciences. 24, 13, 10585.

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• 2022

  Antibiotic resistance and polymyxin B resistance mechanism of Aeromonas spp. isolated from yellow catfish, hybrid snakeheads and associated water from intensive fish farms in Southern China

  Li, L., Yao, R., Olsen, R. H., Zhang, Y. & Meng, H., 2022, In: LWT. 166, 113802.

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  8 Citations (Scopus)

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• Assessment of automated assays for serum amyloid A, haptoglobin (PIT54) and basic biochemistry in broiler breeders experimentally infected with Escherichia coli

  Kromann, S., Olsen, R. H., Bojesen, A. M., Jensen, H. E. & Thøfner, I., 2022, In: Veterinary Research. 53, 1, 7 p., 25.

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  3 Citations (Scopus)

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• Characterization of extended-spectrum cephalosporins and fluoroquinolone resistance of a Salmonella enterica serovar Thompson isolate from ready-to-eat pork product in China

  Li, L., Olsen, R. H., Xiao, J., Liang, M., Meng, H. & Peng, S., 2022, In: Frontiers in Microbiology. 13, 964009.

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• Engineering a CRISPR interference system targeting AcrAB-TolC efflux pump to prevent multidrug resistance development in Escherichia coli

  Wan, X., Li, Q., Olsen, R. H., Meng, H., Zhang, Z., Wang, J., Zheng, H., Li, L. & Shi, L., 2022, In: The Journal of antimicrobial chemotherapy. 77, 8, p. 2158-2166 9 p.

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  14 Citations (Scopus)

• Epidemiological Prevalence of Phenotypical Resistances and Mobilised Colistin Resistance in Avian Commensal and Pathogenic E. coli from Denmark, France, The Netherlands, and the UK

  Mead, A., Billon-Lotz, C., Olsen, R., Swift, B., Richez, P., Stabler, R. & Pelligand, L., 2022, In: Antibiotics. 11, 5, 631.

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• Exploring the resistome, virulome, mobilome and microbiome along pork production chain using metagenomics

  Li, L., Xiao, Y., Wang, C., Olsen, R. H., Meng, H. & Shi, L., 2022, In: International Journal of Food Microbiology. 371, 109674.

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  8 Citations (Scopus)

• Genetic context of bla_CTX–M–55 and qnrS1 genes in a foodborne Salmonella enterica serotype Saintpaul isolate from China

  Li, L., Olsen, R. H., Xiao, J., Meng, H., Peng, S. & Shi, L., 2022, In: Frontiers in Microbiology. 13, 899062.

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• Genomic Characterization of mcr-1-Carrying Foodborne Salmonella enterica serovar Typhimurium and Identification of a Transferable Plasmid Carrying mcr-1, bla_CTX-M-14, qnrS2, and oqxAB Genes From Ready-to-Eat Pork Product in China

  Li, L., Wan, X., Olsen, R. H., Xiao, J., Wang, C., Xu, X., Meng, H. & Shi, L., 2022, In: Frontiers in Microbiology. 13, 903268.

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• Insight Into the Anti-staphylococcal Activity of JBC 1847 at Sub-Inhibitory Concentration

  Ronco, T., Kappel, L. H., Aragao, M. F., Biagi, N., Svenningsen, S., Christensen, J. B., Permin, A., Saaby, L., Holmstrøm, K., Klitgaard, J. K., Sabat, A. J., Akkerboom, V., Monaco, M., Tinelli, M., Friedrich, A. W., Jana, B. & Olsen, R. H., 2022, In: Frontiers in Microbiology. 12, 786173.

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• Longitudinal study on background lesions in broiler breeder flocks and their progeny, and genomic characterisation of Escherichia coli

  Kromann, S., Baig, S., Stegger, M., Olsen, R. H., Bojesen, A. M., Jensen, H. E. & Thøfner, I., 2022, In: Veterinary Research. 53, 52.

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• Short- and long-read metagenomics insight into the genetic contexts and hosts of mobile antibiotic resistome in Chinese swine farms

  Li, L., Xiao, Y., Olsen, R. H., Wang, C., Meng, H. & Shi, L., 2022, In: Science of the Total Environment. 827, 154352.

  Research output: Contribution to journal › Journal article › Research › peer-review
  17 Citations (Scopus)
• 2021

  A new phenothiazine derivate is active against Clostridioides difficile and shows low cytotoxicity

  Ronco, T., Aragao, F. M., Saaby, L., Christensen, J. B., Permin, A., Williams, A. R., Thamsborg, S. M. & Olsen, R. H., 2021, In: PLoS ONE. 16, 10, 13 p., e0258207.

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  3 Citations (Scopus)

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• Characterization of a Streptococcus species isolated from Siganus guttatus in South China

  Li, L., Wang, C., Olsen, R. H., Li, X., Meng, H., Xu, L. & Shi, L., 2021, In: Aquaculture. 545, 737163.

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  1 Citation (Scopus)

• Development of an aerogenous Escherichia coli infection model in adult broiler breeders

  Kromann, S., Olsen, R. H., Bojesen, A. M., Jensen, H. E. & Thøfner, I., 2021, In: Scientific Reports. 11, 15 p., 19556.

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• Efficacy of a novel antimicrobial hydrogel for eradication of Staphylococcus epidermidis, Staphylococcus aureus and Cutibacterium acnes from preformed biofilm and treatment performance in an in vivo MRSA wound model

  Ronco, T., Aragao, M. F., Svenningsen, S., Christensen, J. B., Permin, A., Saaby, L., Bionda, N., Lantz, E. E. & Olsen, R. H., 2021, In: JAC-Antimicrobial Resistance. 3, 3, 7 p., dlab108.

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  8 Citations (Scopus)

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• First Report of a Foodborne Salmonella enterica Serovar Gloucester (4:i:l,w) ST34 Strain Harboring bla_CTX–M–55 and qnrS Genes Located in IS26-Mediated Composite Transposon

  Li, L., Olsen, R. H., Song, A., Xiao, J., Wang, C., Meng, H. & Shi, L., 2021, In: Frontiers in Microbiology. 12, 646101.

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• First report of two foodborne Salmonella enterica subsp. enterica serovar Bovismorbificans isolates carrying a novel mega-plasmid harboring bla_DHA-1 and qnrB4 genes

  Li, L., Olsen, R. H., Wang, C., Song, A., Xiao, J., Meng, H., Ronco, T. & Shi, L., 2021, In: International Journal of Food Microbiology. 360, 109439.

  Research output: Contribution to journal › Journal article › Research › peer-review
  5 Citations (Scopus)

• Protective potential of an autogenous vaccine in an aerogenous model of escherichia coli infection in broiler breeders

  Kromann, S., Olsen, R. H., Bojesen, A. M., Jensen, H. E. & Thøfner, I., 2021, In: Vaccines. 9, 11, 1233.

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• 2020

  A novel derivative of thioridazine shows low toxicity and efficient activity against gram‐positive pathogens

  Jørgensen, N. S., Saaby, L., Andersson, A. M., Kromann, S., Sheikhsamani, E., Permin, A., Ronco, T., Svenningsen, S. W., Christensen, J. B. & Olsen, R. H., 2020, In: Antibiotics. 9, 6, 11 p., 327.

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  5 Citations (Scopus)

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• A Novel Promazine Derivative Shows High in vitro and in vivo Antimicrobial Activity Against Staphylococcus aureus

  Ronco, T., Jørgensen, N. S., Holmer, I., Kromann, S., Sheikhsamani, E., Permin, A., Svenningsen, S. W., Christensen, J. B. & Olsen, R. H., 2020, In: Frontiers in Microbiology. 11, 12 p., 560798.

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  9 Citations (Scopus)

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• GtxA is a virulence factor that promotes a Th2-like response during Gallibacterium anatis infection in laying hens

  Tang, B., Pors, S. E., Kristensen, B. M., Skjerning, R. B. J., Olsen, R. H. & Bojesen, A. M., 2020, In: Veterinary Research. 51, 1, 12 p., 40.

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  7 Citations (Scopus)

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• 2019

  Correlation between footpad lesions and systemic bacterial infections in broiler breeders

  Thøfner, I. C. N., Poulsen, L. L., Bisgaard, M., Christensen, H., Olsen, R. H. & Christensen, J. P., 2019, In: Veterinary Research. 50, 1, 5 p., 38.

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  20 Citations (Scopus)

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• Diversity and population overlap between avian and human Escherichia coli belonging to sequence type 95

  Jørgensen, S. L., Stegger, M., Kudirkiene, E., Lilje, B., Poulsen, L. L., Ronco, T., Dos Santos, T. P., Kiil, K., Bisgaard, M., Pedersen, K., Nolan, L. K., Price, L. B., Olsen, R. H., Andersen, P. S. & Christensen, H., 2019, In: mSphere. 4, 1, 12 p., e00333-18.

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  68 Citations (Scopus)

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• Draft genome sequences of three human pathogenic acinetobacter baumannii strains

  Madhi, M., Ronco, T., Hasani, A. & Olsen, R. H., 2019, In: Microbiology Resource Announcements. 8, 14, 2 p., e01742-18.

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• In vitro synergy of sertraline and tetracycline cannot be reproduced in pigs orally challenged with a tetracycline resistant Escherichia coli

  Kromann, S., Hvidtfeldt, A., Boye, M., Sørensen, D. B., Jørgensen, S., Nielsen, J. P. & Olsen, R. H., 2019, In: BMC Microbiology. 19, 1, 12 p., 12.

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  3 Citations (Scopus)

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• Longitudinal Study on Causes of Mortality in Danish Broiler Breeders

  Thoefner, I., Poulsen, L. L., Bisgaard, M., Christensen, H., Olsen, R. H. & Christensen, J. P., 2019, In: Avian Diseases. 63, 3, 400-410.

  Research output: Contribution to journal › Journal article › Research › peer-review
  21 Citations (Scopus)

• Reclassification of Bisgaard taxon 37 and taxon 44 as Psittacicella melopsittaci gen. nov., sp. nov., Psittacicella hinzii sp. nov. and Psittacicella gerlachiana sp. nov. within Psittacicellaceae fam. nov. of the order Pasteurellales

  Xin, D., Bisgaard, M., Busse, H. J., Olsen, R. H., Hess, C., Aalbæk, B., Olsen, J. E. & Christensen, H., 2019, In: International Journal of Systematic and Evolutionary Microbiology. 69, 2, p. 350-355 6 p., 003133.

  Research output: Contribution to journal › Journal article › Research › peer-review
• 2018

  Characterization of prevalent bacterial pathogens associated with pododermatitis in table egg layers

  Heidemann Olsen, R., Christensen, H., Kabell, S. & Bisgaard, M., 4 May 2018, In: Avian Pathology. 47, 3, p. 281-285 5 p.

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  26 Citations (Scopus)

• Transmission and pathogenicity of Gallibacterium anatis and Escherichia coli in embryonated eggs

  Wang, C., Pors, S. E., Olsen, R. H. & Bojesen, A. M., 2018, In: Veterinary Microbiology. 217, p. 76-81 6 p.

  Research output: Contribution to journal › Journal article › Research › peer-review
  27 Citations (Scopus)
• 2017

  Chromosomal features of Escherichia coli serotype O2:K2, an avian pathogenic E. coli

  Jørgensen, S. L., Kudirkiene, E., Li, L., Christensen, J. P., Olsen, J. E., Nolan, L. K. & Olsen, R. H., 10 May 2017, In: Standards in Genomic Sciences. 12, 9 p., 33.

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• Evaluation of the efficacy of an autogenous Escherichia coli vaccine in broiler breeders

  Li, L., Thøfner, I., Christensen, J. P., Ronco, T., Pedersen, K. & Olsen, R. H., Jun 2017, In: Avian pathology : journal of the W.V.P.A. 46, 3, p. 300-308 9 p.

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  34 Citations (Scopus)

• Impact of egg disinfection of hatching eggs on the eggshell microbiome and bacterial load

  Olsen, R., Kudirkiene, E., Thofner, I., Pors, S., Karlskov-Mortensen, P., Li, L., Papasolomontos, S., Angastiniotou, C. & Christensen, J., Nov 2017, In: Poultry Science. 96, 11, p. 3901-3911

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  42 Citations (Scopus)

• Insight into synergetic mechanisms of tetracycline and the selective serotonin reuptake inhibitor, sertraline, in a tetracycline-resistant strain of Escherichia coli

  Li, L., Kromann, S., Olsen, J. E., Svenningsen, S. W. & Olsen, R. H., 2017, In: Journal of Antibiotics. 70, 9, p. 944-953 10 p.

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  25 Citations (Scopus)

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• Longitudinal study of transmission of Escherichia coli from broiler breeders to broilers

  Poulsen, L. L., Thoefner, I., Bisgaard, M., Christensen, J. P., Olsen, R. H. & Christensen, H., 2017, In: Veterinary Microbiology. 207, p. 13-18

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  55 Citations (Scopus)

• Spread of avian pathogenic Escherichia coli ST117 O78:H4 in Nordic broiler production

  Ronco, T., Stegger, M., Olsen, R. H., Sekse, C., Nordstoga, A. B., Pohjanvirta, T., Lilje, B., Lyhs, U., Andersen, P. S. & Pedersen, K., 3 Jan 2017, In: BMC Genomics. 18, 8 p., 13.

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• Staphylococcus agnetis, a potential pathogen in broiler breeders

  Poulsen, L. L., Thøfner, I., Bisgaard, M., Olsen, R. H., Christensen, J. P. & Christensen, H., 2017, In: Veterinary Microbiology. 212, p. 1-6 6 p.

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  20 Citations (Scopus)

• Treatment with high-dose antidepressants severely exacerbates the pathological outcome of experimental Escherichia coli infections in poultry

  Kromann, S., Kudirkiene, E., Li, L., Thoefner, I., Daldorph, E., Christensen, J. P., Meng, H. & Olsen, R. H., 2017, In: PLoS ONE. 12, 10, 15 p., e0185914.

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• 2016

  Antimicrobial Resistance and Resistance Genes in Aerobic Bacteria Isolated from Pork at Slaughter

  Li, L., Olsen, R. H., Ye, L., Yan, H., Nie, Q., Meng, H. & Shi, L., Apr 2016, In: Journal of Food Protection. 79, 4, p. 589-597 9 p.

  Research output: Contribution to journal › Journal article › Research › peer-review
  17 Citations (Scopus)

• Beskytter E. coli autovacciner mod æggeleder- og bughindebetændelse under eksperimentelle forhold?

  Thøfner, I., Ronco, T., Christensen, J. P., Pedersen, K. & Olsen, R. H., 2016, In: Dansk Erhvervsfjerkrae. 45, 11, p. 42-45

  Research output: Contribution to journal › Journal article › Research

• Characterization of Antimicrobial Resistance of Listeria monocytogenes Strains Isolated from a Pork Processing Plant and Its Respective Meat Markets in Southern China

  Li, L., Olsen, R. H., Ye, L., Wang, W., Shi, L., Yan, H. & Meng, H., May 2016, In: Foodborne pathogens and disease. 13, 5, p. 262-668 7 p.

  Research output: Contribution to journal › Journal article › Research › peer-review
  25 Citations (Scopus)

• Draft Genome Sequences of Two Avian Pathogenic Escherichia coli Strains of Clinical Importance, E44 and E51

  Ronco, T., Stegger, M., Andersen, P. S., Pedersen, K., Li, L., Thøfner, I. C. N. & Olsen, R. H., 2016, In: Genome Announcements. 4, 4, 2 p., e00768-16.

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• Experimental induced avian E. coli salpingitis: significant impact of strain and host factors on the clinical and pathological outcome

  Olsen, R. H., Thøfner, I., Pors, S. E., Pires dos Santos, T. M. S. & Christensen, J. P., 2016, In: Veterinary Microbiology. 188, p. 59-66 8 p.

  Research output: Contribution to journal › Journal article › Research › peer-review
  15 Citations (Scopus)

• Pathology and Molecular Characterization of Escherichia Coli Associated With the Avian Salpingitis-Peritonitis Disease Syndrome

  Olsen, R. H., Bisgaard, M., Christensen, J. P., Kabell, S. & Christensen, H., Mar 2016, In: Avian Diseases. 60, 1, p. 1-7 7 p.

  Research output: Contribution to journal › Journal article › Research › peer-review
  18 Citations (Scopus)
• 2015

  Draft genome sequences of five clinical Enterococcus cecorum strains isolated from different poultry species in Poland

  Dolka, B., Olsen, R. H., Thøfner, I. & Christensen, J. P., 2015, In: Genome Announcements. 3, 5, 2 p., e01085-15.

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  2 Citations (Scopus)

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