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Jones DT, Srinivasmurthy R, Pandit M, Tovar R, Ho L, Wairimu K. Raoultella ornithinolytica Urinary Tract Infection in a Patient With Triple-Negative Breast Cancer. Cureus 2024; 16:e64742. [PMID: 39021744 PMCID: PMC11254315 DOI: 10.7759/cureus.64742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/17/2024] [Indexed: 07/20/2024] Open
Abstract
Due to the challenges associated with accurately identifying Raoultella ornithinolytica as the causative agent in urinary tract infections (UTIs), coupled with limited guidance on treatment protocols, reports of similar cases still need to be made publicly available because of their increasing emergence. In this article, we present the first documented case of a UTI caused by Raoultella ornithinolytica in a patient with triple-negative breast cancer undergoing neoadjuvant chemotherapy. This case report highlights Raoultella ornithinolytica as an uncommon yet significant pathogen, particularly in immunocompromised patients. Given the bacterium's antibiotic resistance patterns, it emphasizes the importance of prompt, accurate identification methods and tailored treatment strategies, especially in vulnerable populations undergoing chemotherapy.
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Affiliation(s)
- Daniel T Jones
- Internal Medicine, Touro University Nevada, Henderson, USA
| | | | - Meghana Pandit
- Internal Medicine, Touro University Nevada, Henderson, USA
| | - Rachel Tovar
- Internal Medicine, Touro University Nevada, Henderson, USA
| | - Liawaty Ho
- Oncology, Comprehensive Cancer Centers, Las Vegas, USA
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Li S, Li F, Bao Y, Peng A, Lyu B. Polyethylene and sulfa antibiotic remediation in soil using a multifunctional degrading bacterium. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 930:172619. [PMID: 38649045 DOI: 10.1016/j.scitotenv.2024.172619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Revised: 03/29/2024] [Accepted: 04/17/2024] [Indexed: 04/25/2024]
Abstract
To obtain a multifunctional bacterium that can effectively degrade polyethylene (PE) and sulfonamide antibiotics (SAs), PE and SAs were selected as the primary research objects. Multifunctional degrading bacteria were isolated and screened from an environment in which plastics and antibiotics have existed for a long time. An efficient degrading strain, Raoultella sp., was screened by measuring the degradation performance of PE and SAs. We analyzed the changes in the microbial community of indigenous bacteria using 16S rRNA. After 60 d of degradation at 28 °C, the Raoultella strain to PE degradation rate was 4.20 %. The SA degradation rates were 96 % (sulfonathiazole, (ST)), 86 % (sulfamerazine, (SM)), 72 % (sulfamethazine, (SM2)) and 64 % (sulfamethoxazole, (SMX)), respectively. This bacterium increases the surface roughness of PE plastic films and produces numerous gullies, pits, and folds. In addition, after 60 d, the contact angle of the plastic film decreased from 92.965° to 70.205°, indicating a decrease in hydrophobicity. High-throughput sequencing analysis of the degrading bacteria revealed that the Raoultella strain encodes enzymes involved in PE and SA degradation. The results of this study not only provide a theoretical basis for further study of the degradation mechanism of multifunctional and efficient degrading bacteria but also provide potential strain resources for the biodegradation of waste plastics and antibiotics in the environment.
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Affiliation(s)
- Shuo Li
- College of Environmental Science and Engineering, Qingdao University, Qingdao, China; Carbon Neutrality and Eco-Environmental Technology Innovation Center of Qingdao, Qingdao 266071, China.
| | - Fachao Li
- College of Environmental Science and Engineering, Qingdao University, Qingdao, China; Carbon Neutrality and Eco-Environmental Technology Innovation Center of Qingdao, Qingdao 266071, China
| | - Yanwei Bao
- College of Environmental Science and Engineering, Qingdao University, Qingdao, China; Carbon Neutrality and Eco-Environmental Technology Innovation Center of Qingdao, Qingdao 266071, China
| | - Ankai Peng
- College of Environmental Science and Engineering, Qingdao University, Qingdao, China; Carbon Neutrality and Eco-Environmental Technology Innovation Center of Qingdao, Qingdao 266071, China
| | - Boya Lyu
- College of Environmental Science and Engineering, Qingdao University, Qingdao, China; Carbon Neutrality and Eco-Environmental Technology Innovation Center of Qingdao, Qingdao 266071, China
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3
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Mettler SK, Charoenngam N, Colgrove RC. Clinical differences between Raoultella spp. and Klebsiella oxytoca. Front Cell Infect Microbiol 2024; 14:1260212. [PMID: 38887491 PMCID: PMC11180880 DOI: 10.3389/fcimb.2024.1260212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Accepted: 05/15/2024] [Indexed: 06/20/2024] Open
Abstract
Purpose Raoultella spp. is a genus of bacteria that is known to be closely related to Klebsiella. It has been debated whether Raoultella should be reclassified as a subgroup of Klebsiella. The aim of this study is to compare clinical aspects of Raoultella and Klebsiella oxytoca, a species of Klebsiella that is known to be bacteriologically similar to Raoultella spp. Methods Using data collected at a tertiary care hospital in the United States, we identified 43 patients with Raoultella infection and 1173 patients with Klebsiella oxytoca infection. We compared patient demographics (age and sex), hospitalization status, isolation sites and antibiotic resistance profiles between the two species. Results There was no significant difference in patient demographics between the two bacteria species. The proportions of intensive care unit (ICU) admission were higher among patients with Raoultella infection (p=0.008). The most common site of isolation was urine for both species (39.5% of all patients with Raoultella spp. vs. 59.3% for K. oxytoca). The second most common site of isolation was blood stream for Raoultella spp. (23.3%) and respiratory tract for K. oxytoca (10.8%). Except for the high proportion of resistant isolates of Raoultella spp. for Trimethoprim/sulfamethoxazole, the antibiotic susceptibility profiles were similar between the two bacteria species. Both were susceptible to ciprofloxacin and meropenem. Conclusion While there are no significant differences in the patient demographics and antibiotic susceptibility profiles between Raoultella spp. and K. oxytoca, Raoultella may cause more serious infection requiring ICU admissions. Also, Raoultella may cause blood stream infection more frequently than K. oxytoca.
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Affiliation(s)
- Sofia K. Mettler
- Faculty of Medicine, University of Zurich, Zurich, Switzerland
- Department of Medicine, Mount Auburn Hospital, Cambridge, MA, United States
- Harvard Medical School, Boston, MA, United States
| | - Nipith Charoenngam
- Department of Medicine, Mount Auburn Hospital, Cambridge, MA, United States
- Harvard Medical School, Boston, MA, United States
- Mahidol University, Faculty of Medicine Siriraj Hospital, Bangkok, Thailand
| | - Robert C. Colgrove
- Department of Medicine, Mount Auburn Hospital, Cambridge, MA, United States
- Harvard Medical School, Boston, MA, United States
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Tate DE, Tanprasertsuk J, Jones RB, Maughan H, Chakrabarti A, Khafipour E, Norton SA, Shmalberg J, Honaker RW. A Randomized Controlled Trial to Evaluate the Impact of a Novel Probiotic and Nutraceutical Supplement on Pruritic Dermatitis and the Gut Microbiota in Privately Owned Dogs. Animals (Basel) 2024; 14:453. [PMID: 38338095 PMCID: PMC10854619 DOI: 10.3390/ani14030453] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Revised: 01/23/2024] [Accepted: 01/27/2024] [Indexed: 02/12/2024] Open
Abstract
Pruritic dermatitis (PD) is a common presentation of canine allergic skin diseases, with diversity in severity and treatment response due to complex etiopathogenesis. Evidence suggests the gut microbiota (GM) may contribute to the development of canine allergies. A 10-week double-blind randomized controlled trial evaluated a novel probiotic and nutraceutical blend (PNB) on clinical signs of skin allergy, health measures, and the GM of privately owned self-reported pruritic dogs. A total of 105 dogs were enrolled, with 62 included in pruritus and health analysis and 50 in microbiome analysis. The PNB supported greater improvement of owner-assessed clinical signs of PD at week 2 than the placebo (PBO). More dogs that received the PNB shifted to normal pruritus (digital PVAS10-N: <2) by week 4, compared to week 7 for the PBO. While a placebo effect was identified, clinical differences were supported by changes in the GM. The PNB enriched three probiotic bacteria and reduced abundances of species associated with negative effects. The PBO group demonstrated increased abundances of pathogenic species and reduced abundances of several beneficial species. This trial supports the potential of the PNB as a supplemental intervention in the treatment of PD; however, further investigation is warranted, with stricter diagnostic criteria, disease biomarkers and direct veterinary examination.
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Affiliation(s)
- Devon E. Tate
- NomNomNow Inc., Nashville, TN 37207, USA; (D.E.T.); (J.T.); (R.B.J.)
| | | | - Roshonda B. Jones
- NomNomNow Inc., Nashville, TN 37207, USA; (D.E.T.); (J.T.); (R.B.J.)
| | | | | | - Ehsan Khafipour
- Cargill Inc., Wayzata, MN 55391, USA; (A.C.); (E.K.); (S.A.N.)
| | | | - Justin Shmalberg
- Department of Comparative, Diagnostic, and Population Medicine, College of Veterinary Medicine, University of Florida, Gainesville, FL 32611, USA
| | - Ryan W. Honaker
- NomNomNow Inc., Nashville, TN 37207, USA; (D.E.T.); (J.T.); (R.B.J.)
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Delik E, Eroğlu B, Tefon-Öztürk BE. Evaluation of the in vitro effects of concentrations of antibiotics on three Enterobacteriaceae isolates. World J Microbiol Biotechnol 2024; 40:73. [PMID: 38240926 PMCID: PMC10799096 DOI: 10.1007/s11274-023-03877-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Accepted: 12/17/2023] [Indexed: 01/22/2024]
Abstract
Due to the misuse and overuse of antibiotics, bacteria are now exposed to sub-minimum inhibitory concentrations (sub-MICs) of antibiotics in various environments. In recent years, exposure of bacteria to sub-MICs of antibiotics has led to the widespread emergence of antibiotic-resistant bacteria. In this study, three bacterial species from the Enterobacteriaceae family (Raoultella ornithinolytica, Pantoea agglomerans and Klebsiella quasivariicola) were isolated from water. The antibiotic susceptibility of these bacteria to 16 antibiotics was then investigated. The effects of sub-MICs of four selected antibiotics (kanamycin, chloramphenicol, meropenem, and ciprofloxacin) on the growth, biofilm formation, surface polysaccharide production, siderophore production, morphology, and expression of the translational/transcriptional regulatory transformer gene rfaH of these bacteria were analysed. The MICs of kanamycin, chloramphenicol, meropenem, and ciprofloxacin were determined to be 1, 2, 0.03 and 0.03 µg/mL for R. ornithinolytica; 0.6, 6, 0.03 and 0.05 µg/mL for P. agglomerans; and 2, 5, 0.04 and 0.2 µg/mL for K. quasivariicola. The growth kinetics and biofilm formation ability decreased for all three isolates at sub-MICs. The surface polysaccharides of R. ornithinolytica and P. agglomerans increased at sub-MICs. There was no significant change in the siderophore activities of the bacterial isolates, with the exception of MIC/2 meropenem in R. ornithinolytica and MIC/2 kanamycin in K. quasivariicola. It was observed that the sub-MICs of meropenem and ciprofloxacin caused significant changes in bacterial morphology. In addition, the expression of rfaH in R. ornithinolytica and K. quasivariicola increased with the sub-MICs of the selected antibiotics.
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Affiliation(s)
- Eda Delik
- Biology Department, Faculty of Science, Akdeniz University, 07070, Antalya, Turkey
| | - Berfin Eroğlu
- Biology Department, Faculty of Science, Akdeniz University, 07070, Antalya, Turkey
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Ndibarema ER, Olum R, Ogavu J, Makhoba A. A rare case of multi-drug resistant Raoultella ornithinolytica-induced sepsis in a healthy young man in Uganda. Clin Case Rep 2024; 12:e8402. [PMID: 38173896 PMCID: PMC10761617 DOI: 10.1002/ccr3.8402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 11/30/2023] [Accepted: 12/14/2023] [Indexed: 01/05/2024] Open
Abstract
Key Clinical Message Antimicrobial resistance (AMR) is a public health challenge. It causes unresponsiveness to treatment with antimicrobials, leads to sepsis, septic shock, and increased hospital mortality. This is compounded by new multidrug resistant organisms. We present and discuss a case of sepsis caused by a rare multi-drug resistant bacterium Raoultella ornithinolytica. Abstract Antimicrobial resistance is a major public health concern worldwide, associated with nearly 5 million deaths. The highest mortality attributed to AMR is seen in sub-Saharan Africa. Escherichia coli, Staphylococcus aureus, Klebsiella pneumoniae, Streptococcus pneumoniae, Acinetobacter baumannii, and Pseudomonas aeruginosa contribute to most deaths attributed to AMR globally. However, other uncommon microorganisms have been implicated. Few cases of resistant, extended-spectrum beta-lactamase (ESBL) producing Raoultella ornithinolytica have been reported to cause sepsis worldwide. To our knowledge, no case of R. ornithinolytica-induced sepsis has been reported in our settings. We report a case of sepsis due to R. ornithinolytica in an injured young adult. We received a 36-year-old man, a professional banker involved in a road traffic accident 2 h before admission. He sustained a deep degloving wound on the right ankle with exposure of the lateral malleolus and presented with severe pain, and bleeding at the injury site. x-Rays confirmed a comminuted intra-articular distal tibia and fibular fracture. Surgical debridement and external fixation were aseptically done on the same day. Below knee amputation was done on the 7th day post-admission due to extensively injured and infected limb with sepsis. Local pus culture isolated ESBL-positive R. ornithinolytica susceptible only to meropenem, ciprofloxacin, and amikacin. Introducing these antibiotics on the 11th post-admission day averted sepsis and enhanced patient recovery. With the threat of AMR, newly emerging highly resistant microbes should be expected and suspected. Early recognition of sepsis and its focus and precise intervention with antimicrobials guided by specimen culture and susceptibility profile is highly recommended and should be standard practice. It highly reduces morbidity and mortality due to sepsis.
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Affiliation(s)
- Elias Rugaatwa Ndibarema
- Department of MedicineSt Francis Hospital NsambyaKampalaUganda
- Mother Kevin Postgraduate Medical School, School of MedicineUganda Martyrs UniversityKampalaUganda
| | - Ronald Olum
- Department of MedicineSt Francis Hospital NsambyaKampalaUganda
- School of Public HealthMakerere UniversityKampalaUganda
- School of Public HealthImperial College LondonUnited Kingdom
| | - Joseph Ogavu
- Department of MedicineSt Francis Hospital NsambyaKampalaUganda
- Mother Kevin Postgraduate Medical School, School of MedicineUganda Martyrs UniversityKampalaUganda
| | - Anthony Makhoba
- Department of MedicineSt Francis Hospital NsambyaKampalaUganda
- Mother Kevin Postgraduate Medical School, School of MedicineUganda Martyrs UniversityKampalaUganda
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Karnmongkol C, Wiriyaampaiwong P, Teerakul M, Treeinthong J, Srisamoot N, Tankrathok A. Emergence of NDM-1-producing Raoultella ornithinolytica from reservoir water in Northeast Thailand. Vet World 2023; 16:2321-2328. [PMID: 38152267 PMCID: PMC10750751 DOI: 10.14202/vetworld.2023.2321-2328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2023] [Accepted: 10/23/2023] [Indexed: 12/29/2023] Open
Abstract
Background and Aim Antibiotic resistance is a major global health threat. The increasing prevalence of drug-resistant bacteria poses a serious challenge to the effective treatment of infections in both humans and animals. Water is a major source of human and animal exposure to bacteria, and the presence of drug-resistant bacteria in water could present a severe threat to public health and animal production. This study investigated the presence of drug-resistant bacteria in Lam Pao Dam (LPD) water in Kalasin, Thailand. Materials and Methods Ampicillin-resistant strains were obtained from LPD water and identified using 16s rDNA sequencing. Antibiotic resistance genes were detected by polymerase chain reaction using specific primers. The presence of antibiotic-resistant bacteria was evaluated using 16s amplicon analysis. The minimum inhibitory concentration (MIC) of Raoultella ornithinolytica strains against antibiotics was determined. Results A total of 12 R. ornithinolytica, 4 Bacillus cereus, and 4 Enterococcus faecalis isolates were resistant to ampicillin. Almost all R. ornithinolytica strains harbored blaSHV and blaOXA genes, and two strains also harbored the blaNDM-1 gene. All four E. faecalis strains harbored the blaIMP gene. The most abundant species in the LPD sample was Exiguobacterium indicum, followed by E. faecalis and R. ornithinolytica. The MICs of 10 R. ornithinolytica strains against five antibiotics revealed that all strains were resistant to ampicillin but susceptible to meropenem, doripenem, ertapenem, and imipenem. Conclusion These findings suggest a high prevalence of drug-resistant bacteria in LPD water. This is a cause for concern, as it could spread antibiotic-resistant infections in the community.
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Affiliation(s)
- Chutima Karnmongkol
- Department of Biotechnology, Faculty of Agricultural Technology, Kalasin University, Kalasin, Thailand
| | - Piyachat Wiriyaampaiwong
- Department of Biotechnology, Faculty of Agricultural Technology, Kalasin University, Kalasin, Thailand
| | - Mullika Teerakul
- Department of Biotechnology, Faculty of Agricultural Technology, Kalasin University, Kalasin, Thailand
| | - Jukkarin Treeinthong
- Department of Fisheries Technology, Faculty of Agricultural Technology, Kalasin University, Kalasin, Thailand
| | - Nattapong Srisamoot
- Department of Biotechnology, Faculty of Agricultural Technology, Kalasin University, Kalasin, Thailand
| | - Anupong Tankrathok
- Department of Biotechnology, Faculty of Agricultural Technology, Kalasin University, Kalasin, Thailand
- Protein and Proteomics Research Center for Commercial and Industrial Purposes (ProCCI), Faculty of Science, Khon Kaen University, Khon Kaen, Thailand
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Wu Z, Gou R, Sha L, Yu C, Meng L, Jin Z. Effects of Luteolin-7-O-Glucoside on Intestinal Microbiota Dysbiosis and Drug Resistance Transmission Caused by Raoultella ornithinolytica B1645-1: Modulating the Composition of Intestinal Microbiota and Promoting the Transfer of blaNDM-1 Gene from Genus Enterococcus to Lactobacillus in Mice. Microorganisms 2023; 11:2477. [PMID: 37894135 PMCID: PMC10609467 DOI: 10.3390/microorganisms11102477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 09/27/2023] [Accepted: 09/28/2023] [Indexed: 10/29/2023] Open
Abstract
Raoultella ornithinolytica is an Enterobacteriaceae bacterium that can infect both humans and animals, while luteolin-7-O-glucoside (IOG) is a flavonoid that has broad effects on the intestinal microbiota of healthy animals. However, current studies lack sufficient data on intestinal microbiota dysbiosis and drug resistance transmission caused by R. ornithinolytica and the possible role of IOG. In this study, BALB/c mice were infected with R. ornithinolytica carrying blaNDM-1 gene and treated with IOG (3 mg/kg·d and 6 mg/kg·d) to analyze the diversity of intestinal microbiota and the transfer of blaNDM-1 between bacteria. The findings indicated that R. ornithinolytica B1645-1 exhibited a significant ability to enhance the Firmicutes/Bacteroidota ratio and increase the relative abundance of Lactobacillus and Bacillus after 48 h, where as 6 mg/kg·d IOG had an opposite effect. Moreover, R. ornithinolytica B1645-1 facilitated the emergence of drug-resistant bacteria and promoted blaNDM-1 gene transfer in Enterococcus, Escherichia, Klebsiella, Acinetobacter, Bacillus, Brevibacterium, and Lactobacillus. Enterococcus was the predominant genus at 48 h. Surprisingly, 6 mg/kg·d IOG significantly inhibited the production of drug-resistant bacteria and promoted blaNDM-1 gene transfer from Enterococcus to Lactobacillus at 144 h. However, the role of Lactobacillus as a recipient for drug-resistant genes should be of more concern.
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Affiliation(s)
- Zhaomeng Wu
- Hubei Key Laboratory of Embryonic Stem Cell Research, School of Basic Medical Sciences, Hubei University of Medicine, Shiyan 442000, China; (Z.W.); (R.G.); (L.S.); (C.Y.)
| | - Ronghui Gou
- Hubei Key Laboratory of Embryonic Stem Cell Research, School of Basic Medical Sciences, Hubei University of Medicine, Shiyan 442000, China; (Z.W.); (R.G.); (L.S.); (C.Y.)
| | - Longhua Sha
- Hubei Key Laboratory of Embryonic Stem Cell Research, School of Basic Medical Sciences, Hubei University of Medicine, Shiyan 442000, China; (Z.W.); (R.G.); (L.S.); (C.Y.)
| | - Chunfang Yu
- Hubei Key Laboratory of Embryonic Stem Cell Research, School of Basic Medical Sciences, Hubei University of Medicine, Shiyan 442000, China; (Z.W.); (R.G.); (L.S.); (C.Y.)
| | - Lixue Meng
- Hubei Key Laboratory of Embryonic Stem Cell Research, School of Basic Medical Sciences, Hubei University of Medicine, Shiyan 442000, China; (Z.W.); (R.G.); (L.S.); (C.Y.)
| | - Zhixiong Jin
- Hubei Key Laboratory of Embryonic Stem Cell Research, School of Basic Medical Sciences, Hubei University of Medicine, Shiyan 442000, China; (Z.W.); (R.G.); (L.S.); (C.Y.)
- Hubei Key Laboratory of Wudang Local Chinese Medicine Research, School of Pharmaceutical Sciences, Hubei University of Medicine, Shiyan 442000, China
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Iyer R, Iken B. Whole genome sequencing data of Raoultella ornithinolytica PX02 isolated from San Jacinto river sediment in Baytown, Texas. Data Brief 2023; 50:109506. [PMID: 37674506 PMCID: PMC10477434 DOI: 10.1016/j.dib.2023.109506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 07/24/2023] [Accepted: 08/15/2023] [Indexed: 09/08/2023] Open
Abstract
Raoultella ornithinolytica PX02 is a Gram-negative, encapsulated bacterium, part of the Enterobacteriaceae family, emerging as a notable human pathogen. Here, we present the whole genome sequence of R. ornithinolytica PX02 isolated from San Jacinto River sediment near a Burnet Shores community in Baytown, Texas. This microorganism harbors a large 200,000 bp incF plasmid and can potentially be a significant antibiotic reservoir. The PX02 genome consists of 5,970,914 base pairs encoding approximately 5,661 functional proteins. Strain PX02 (chromosomal and plasmid) was compiled at the scaffold level and can be accessed through the National Center for Biotechnology Information database under accession NZ_NJBC00000000.1.
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Affiliation(s)
- Rupa Iyer
- Division of Research, Innovation, and Economic Development, Tarleton State University, Stephenville 76401, Texas
| | - Brian Iken
- Division of Research, Innovation, and Economic Development, Tarleton State University, Stephenville 76401, Texas
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10
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Baek J, Park MJ, Lee HY, Kang S. Raoultella Ornithinolytica in a Healthy, Young Person: Rapidly Progressive Sinusitis with Orbital and Intracranial Involvement. Eur J Case Rep Intern Med 2023; 10:003987. [PMID: 37789980 PMCID: PMC10545151 DOI: 10.12890/2023_003987] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Accepted: 07/10/2023] [Indexed: 10/05/2023] Open
Abstract
Raoultella ornithinolytica is an encapsulated, Gram-negative, nonmotile, rod belonging to the Enterobacteriaceae family. Infections involving the gastrointestinal tract and the hepatopancreatobiliary system are most frequently reported, especially in immunocompromised patients. The authors present an unusual case of acute complicated sinusitis with orbital and intracranial involvement caused by R. ornithinolytica. The infection was rapidly progressive, even though the patient was a healthy, young person without any co-morbidities. The patient's condition improved after antibiotic treatment and multiple ophthalmic and sinus surgeries. LEARNING POINTS Raoultella ornithinolytica can cause rapidly progressive infections, even in immunocompetent young individuals.Raoultella ornithinolytica identified in sinusitis can be a true pathogen rather than an innocent bystander.
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Affiliation(s)
- Jihyeon Baek
- Division of Infectious Diseases, Department of Internal Medicine, Inha University College of Medicine, Incheon, South Korea
| | - Marn Joon Park
- Department of Otorhinolaryngology-Head and Neck Surgery, Inha University College of Medicine, Incheon, South Korea
| | - Ha Young Lee
- Department of Radiology, Inha University College of Medicine, Incheon, South Korea
| | - Sungmo Kang
- Department of Ophthalmology, Inha University College of Medicine, Incheon, South Korea
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Yuan Y, Liu P, Zheng Y, Li Q, Bian J, Liang Q, Su T, Dian L, Qi Q. Unique Raoultella species isolated from petroleum contaminated soil degrades polystyrene and polyethylene. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 263:115232. [PMID: 37429089 DOI: 10.1016/j.ecoenv.2023.115232] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Revised: 06/12/2023] [Accepted: 07/04/2023] [Indexed: 07/12/2023]
Abstract
Polyolefin plastics, such as polyethylene (PE) and polystyrene (PS), are the most widely used synthetic plastics in our daily life. However, the chemical structure of polyolefin plastics is composed of carbon-carbon (C-C) bonds, which is extremely stable and makes polyolefin plastics recalcitrant to degradation. The growing accumulation of plastic waste has caused serious environmental pollution and has become a global environmental concern. In this study, we isolated a unique Raoultella sp. DY2415 strain from petroleum-contaminated soil that can degrade PE and PS film. After 60 d of incubation with strain DY2415, the weight of the UV-irradiated PE (UVPE) film and PS film decreased by 8% and 2%, respectively. Apparent microbial colonization and holes on the surface of the films were observed by scanning electron microscopy (SEM). Furthermore, the Fourier transform infrared spectrometer (FTIR) results showed that new oxygen-containing functional groups such as -OH and -CO were introduced into the polyolefin molecular structure. Potential enzymes that may be involved in the biodegradation of polyolefin plastics were analyzed. These results demonstrate that Raoultella sp. DY2415 has the ability to degrade polyolefin plastics and provide a basis for further investigating the biodegradation mechanism.
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Affiliation(s)
- Yingbo Yuan
- State Key Laboratory of Microbial Technology, Shandong University, 72 Binhai Road, Qingdao 266237, China
| | - Pan Liu
- State Key Laboratory of Microbial Technology, Shandong University, 72 Binhai Road, Qingdao 266237, China
| | - Yi Zheng
- State Key Laboratory of Microbial Technology, Shandong University, 72 Binhai Road, Qingdao 266237, China
| | - Qingbin Li
- State Key Laboratory of Microbial Technology, Shandong University, 72 Binhai Road, Qingdao 266237, China
| | - Junling Bian
- State Key Laboratory of Microbial Technology, Shandong University, 72 Binhai Road, Qingdao 266237, China
| | - Quanfeng Liang
- State Key Laboratory of Microbial Technology, Shandong University, 72 Binhai Road, Qingdao 266237, China
| | - Tianyuan Su
- State Key Laboratory of Microbial Technology, Shandong University, 72 Binhai Road, Qingdao 266237, China.
| | - Longyang Dian
- State Key Laboratory of Microbial Technology, Shandong University, 72 Binhai Road, Qingdao 266237, China.
| | - Qingsheng Qi
- State Key Laboratory of Microbial Technology, Shandong University, 72 Binhai Road, Qingdao 266237, China
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Zhu J, Lv J, Zhu Z, Wang T, Xie X, Zhang H, Chen L, Du H. Identification of TMexCD-TOprJ-producing carbapenem-resistant Gram-negative bacteria from hospital sewage. Drug Resist Updat 2023; 70:100989. [PMID: 37480594 DOI: 10.1016/j.drup.2023.100989] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 06/14/2023] [Accepted: 07/05/2023] [Indexed: 07/24/2023]
Abstract
Carbapenems and tigecycline are crucial antimicrobials for the treatment of gram-negative bacteria infections. Recently, a novel resistance-nodulation-division (RND) efflux pump gene cluster, tmexCD-toprJ, which confers resistance to tigecycline, has been discovered in animals and clinical isolates. It was reported that hospital sewage could act as a reservoir for gram-negative bacteria with high antimicrobial resistance genes. In this study, we analyzed 84 isolates of carbapenem-resistant gram-negative bacteria (CR-GNB) from hospital sewage, and identified five isolates of TMexCD-ToprJ-producing CR-GNB, including one Raoultella ornithinolytica isolate and four Pseudomonas spp. isolates. All these five isolates carried at least one carbapenem resistance gene and were resistant to multiple antibiotics. Multiple tmexCD-toprJ clusters were detected, including tmexC2D2-toprJ2, tmexC3D3-toprJ3, tmexC3.2D3.3-toprJ1b and tmexC3.2D3-toprJ1b. Among these clusters, the genetic construct of tmexC3.2D3-toprJ1b showed 2-fold higher minimum inhibitory concentration (MIC) of tigecycline than other three variants. In addition, it was found that the tmexCD-toprJ gene cluster was originated from Pseudomonas spp. and mainly located on Tn6855 variants inserted in the same umuC-like genes on chromosomes and plasmids. This unit co-localized with blaIMP or blaVIM on IncHI5-, IncpJBCL41- and IncpSTY-type plasmids in the five isolates of TMCR-GNB. The IncHI5- and IncpSTY-type plasmids had the ability to conjugal transfer to E. coli J53 and P. aeruginosa PAO1, highlighting the potential risk of transfer of tmexCD-toprJ from Pseudomonas spp. to Enterobacterales. Importantly, genomic analysis showed that similar tmexCD-toprJ-harboring IncHI5 plasmids were also detected in human samples, suggesting transmission between environmental and human sectors. The emergence of TMCR-GNB from hospital sewage underscores the need for ongoing surveillance of antimicrobial resistance genes, particularly the novel resistance genes such as the tmexCD-toprJ gene clusters in the wastewater environment.
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Affiliation(s)
- Jie Zhu
- Department of Clinical Laboratory, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215004, PR China
| | - Jingnan Lv
- Department of Clinical Laboratory, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215004, PR China; MOE Key Laboratory of Geriatric Diseases and Immunology, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215123, PR China
| | - Zhichen Zhu
- Department of Clinical Laboratory, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215004, PR China
| | - Tao Wang
- Department of Clinical Laboratory, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215004, PR China
| | - Xiaofang Xie
- Department of Clinical Laboratory, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215004, PR China
| | - Haifang Zhang
- Department of Clinical Laboratory, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215004, PR China
| | - Liang Chen
- Hackensack Meridian Health Center for Discovery and Innovation, Nutley, NJ, USA; Department of Medical Sciences, Hackensack Meridian School of Medicine, Nutley, NJ 07110, USA
| | - Hong Du
- Department of Clinical Laboratory, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215004, PR China; MOE Key Laboratory of Geriatric Diseases and Immunology, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215123, PR China.
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Villacís JE, Castelán-Sánchez HG, Rojas-Vargas J, Rodríguez-Cruz UE, Albán V, Reyes JA, Meza-Rodríguez PM, Dávila-Ramos S, Villavicencio F, Galarza M, Gestal MC. Emergence of Raoultella ornithinolytica in human infections from different hospitals in Ecuador with OXA-48-producing resistance. Front Microbiol 2023; 14:1216008. [PMID: 37692398 PMCID: PMC10484340 DOI: 10.3389/fmicb.2023.1216008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Accepted: 08/01/2023] [Indexed: 09/12/2023] Open
Abstract
Purpose The purpose of this study was to highlight the clinical and molecular features of 13 Raoultella ornithinolytica strains isolated from clinical environments in Ecuador, and to perform comparative genomics with previously published genomes of Raoultella spp. As Raoultella is primarily found in environmental, clinical settings, we focused our work on identifying mechanisms of resistance that can provide this bacterium an advantage to establish and persist in hospital environments. Methods We analyzed 13 strains of Raoultella ornithinolytica isolated from patients with healthcare associated infections (HAI) in three hospitals in Quito and one in Santo Domingo de Los Tsáchilas, Ecuador, between November 2017 and April 2018. These isolates were subjected to phenotypic antimicrobial susceptibility testing, end-point polymerase chain reaction (PCR) to detect the presence of carbapenemases and whole-genome sequencing. Results Polymerase chain reaction revealed that seven isolates were positive isolates for blaOXA-48 and one for blaKPC-2 gene. Of the seven strains that presented the blaOXA-48 gene, six harbored it on an IncFII plasmid, one was inserted into the bacterial chromosome. The blaKPC gene was detected in an IncM2/IncR plasmid. From the bioinformatics analysis, nine genomes had the gene blaOXA-48, originating from Ecuador. Moreover, all R. ornithinolytica strains contained the ORN-1 gene, which confers resistance for β-lactams, such as penicillins and cephalosporins. Comparative genome analysis of the strains showed that the pangenome of R. ornithinolytica is considered an open pangenome, with 27.77% of core genes, which could be explained by the fact that the antibiotic resistance genes in the ancestral reconstruction are relatively new, suggesting that this genome is constantly incorporating new genes. Conclusion These results reveal the genome plasticity of R. ornithinolytica, particularly in acquiring antibiotic-resistance genes. The genomic surveillance and infectious control of these uncommon species are important since they may contribute to the burden of antimicrobial resistance and human health.
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Affiliation(s)
- José E. Villacís
- Centro de Investigación para la Salud en América Latina (CISeAL), Pontificia Universidad Católica del Ecuador, Quito, Ecuador
- Centro de Referencia Nacional de Resistencia a los Antimicrobianos, Instituto Nacional de Investigación en Salud Pública, “Leopoldo Izquieta Pérez,” Quito, Ecuador
| | - Hugo G. Castelán-Sánchez
- Programa Investigadoras e Investigadores por México, Grupo de Genómica y Dinámica Evolutiva de Microorganismos Emergentes, Consejo Nacional de Ciencia y Tecnología, México City, Mexico
- Centro de Investigación en Dinámica Celular, Instituto de Investigación en Ciencias Básicas y Aplicadas, Universidad Autónoma del Estado de Morelos, Cuernavaca, Mexico
| | - Jorge Rojas-Vargas
- Departamento de Microbiología Molecular, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Mexico
| | - Ulises E. Rodríguez-Cruz
- Departamento de Ecología Evolutiva, Instituto de Ecología, Universidad Nacional Autónoma de México, México City, Mexico
| | - Viviana Albán
- Centro de Referencia Nacional de Resistencia a los Antimicrobianos, Instituto Nacional de Investigación en Salud Pública, “Leopoldo Izquieta Pérez,” Quito, Ecuador
- Department of Environmental and Occupational Health Sciences, University of Washington, Seattle, WA, United States
| | - Jorge A. Reyes
- Facultad de Ciencias Químicas, Universidad Central del Ecuador, Quito, Ecuador
| | - Pablo M. Meza-Rodríguez
- Centro de Investigación en Dinámica Celular, Instituto de Investigación en Ciencias Básicas y Aplicadas, Universidad Autónoma del Estado de Morelos, Cuernavaca, Mexico
| | - Sonia Dávila-Ramos
- Centro de Investigación en Dinámica Celular, Instituto de Investigación en Ciencias Básicas y Aplicadas, Universidad Autónoma del Estado de Morelos, Cuernavaca, Mexico
| | - Fernando Villavicencio
- Centro de Referencia Nacional de Resistencia a los Antimicrobianos, Instituto Nacional de Investigación en Salud Pública, “Leopoldo Izquieta Pérez,” Quito, Ecuador
| | | | - Monica C. Gestal
- Department of Microbiology and Immunology, Louisiana State University (LSU), Health Science Center at Shreveport, Shreveport, LA, United States
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Crippa C, Pasquali F, Rodrigues C, De Cesare A, Lucchi A, Gambi L, Manfreda G, Brisse S, Palma F. Genomic features of Klebsiella isolates from artisanal ready-to-eat food production facilities. Sci Rep 2023; 13:10957. [PMID: 37414963 PMCID: PMC10326032 DOI: 10.1038/s41598-023-37821-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Accepted: 06/27/2023] [Indexed: 07/08/2023] Open
Abstract
Increasing reports on K. pneumoniae strains with antimicrobial resistance and virulence traits from food and farm animals are raising concerns about the potential role of Klebsiella spp. as a foodborne pathogen. This study aimed to report and characterize Klebsiella spp. isolates from two artisanal ready-to-eat food (soft cheese and salami) producing facilities, and to track similar genotypes in different ecological niches. Over 1170 samples were collected during the whole production chain of different food batches. The overall Klebsiella prevalence was 6%. Strains were classified into the three Klebsiella species complexes: K. pneumoniae (KpSC, n = 17), K. oxytoca (KoSC, n = 38) and K. planticola (KplaSC, n = 18). Despite high genetic diversity we found in terms of known and new sequence types (STs), core genome phylogeny revealed clonal strains persisting in the same processing setting for over 14 months, isolated from the environment, raw materials and end-products. Strains showed a natural antimicrobial resistance phenotype-genotype. K. pneumoniae strains showed the highest virulence potential, with sequence types ST4242 and ST107 strains carrying yersiniabactin ybt16 and aerobactin iuc3. The latter was detected in all K. pneumoniae from salami and was located on a large conjugative plasmid highly similar (97% identity) to iuc3+ plasmids from human and pig strains circulating in nearby regions of Italy. While identical genotypes may persist along the whole food production process, different genotypes from distinct sources in the same facility shared an iuc3-plasmid. Surveillance in the food chain will be crucial to obtain a more comprehensive picture of the circulation of Klebsiella strains with pathogenic potential.
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Affiliation(s)
- Cecilia Crippa
- Department of Agricultural and Food Sciences, Alma Mater Studiorum-University of Bologna, Ozzano dell'Emilia, 40064, Bologna, Italy.
| | - Frédérique Pasquali
- Department of Agricultural and Food Sciences, Alma Mater Studiorum-University of Bologna, Ozzano dell'Emilia, 40064, Bologna, Italy
| | - Carla Rodrigues
- Biodiversity and Epidemiology of Bacterial Pathogens, Institut Pasteur, Université Paris Cité, 75015, Paris, France
| | - Alessandra De Cesare
- Department of Veterinary Medical Sciences, Alma Mater Studiorum-University of Bologna, Ozzano Dell'Emilia, 40064, Bologna, Italy
| | - Alex Lucchi
- Department of Agricultural and Food Sciences, Alma Mater Studiorum-University of Bologna, Ozzano dell'Emilia, 40064, Bologna, Italy
| | - Lucia Gambi
- Department of Agricultural and Food Sciences, Alma Mater Studiorum-University of Bologna, Ozzano dell'Emilia, 40064, Bologna, Italy
| | - Gerardo Manfreda
- Department of Agricultural and Food Sciences, Alma Mater Studiorum-University of Bologna, Ozzano dell'Emilia, 40064, Bologna, Italy
| | - Sylvain Brisse
- Biodiversity and Epidemiology of Bacterial Pathogens, Institut Pasteur, Université Paris Cité, 75015, Paris, France
- Biological Resource Center of Institut Pasteur, Institut Pasteur, Université Paris Cité, 75015, Paris, France
| | - Federica Palma
- Biological Resource Center of Institut Pasteur, Institut Pasteur, Université Paris Cité, 75015, Paris, France
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Walker A, Amato N, Brisson J, Stewart S. Outcomes of surgical treatment with patterns of bacterial culture and antimicrobial susceptibility testing in cases of cervical abscessation in dogs: 82 cases (2018-2021). BMC Res Notes 2023; 16:76. [PMID: 37170130 PMCID: PMC10176722 DOI: 10.1186/s13104-023-06332-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Accepted: 04/12/2023] [Indexed: 05/13/2023] Open
Abstract
OBJECTIVE The objective of this study was to summarize the presentation, diagnosis, and outcome for dogs surgically treated for chronic cervical abscessation following suspected or reported cervical or oropharyngeal trauma, as well as to report on culture results and antimicrobial susceptibility patterns. RESULTS Eighty-two dogs were identified by retrospective review. Successful surgical outcome was achieved in 92.7% of dogs. Abscess recurrence was confirmed or suspected in 6/82 (7.3%) cases, and surgical intervention for abscess recurrence was performed in 4/82 (4.9%) cases. Foreign material was identified at surgery in 5/82 (6%) cases. Incisional healing complications were noted in 9/82 (10.9%) cases and required additional surgery in 5/82 (6%) cases. Twenty-three (28%) dogs had negative culture results. The results of antimicrobial sensitivity testing led to a change in antimicrobial treatment in only 9% of cases.Surgically treated cervical abscessation carries a good prognosis with a low incidence of recurrence in this cohort (in contrast to previous reports), despite low frequency of foreign body removal or identification of the underlying cause of the abscess. Excision of chronic inflammatory tissue may not be necessary for a successful outcome, contrary to previous recommendations. Multi-pathogen infections and anaerobic infections are commonly encountered.
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Affiliation(s)
- Alexandra Walker
- Massachusetts Veterinary Referral Hospital, 20 Cabot Road, Woburn, MA, 01801, USA.
| | - Nicole Amato
- Massachusetts Veterinary Referral Hospital, 20 Cabot Road, Woburn, MA, 01801, USA
| | - Jennifer Brisson
- Massachusetts Veterinary Referral Hospital, 20 Cabot Road, Woburn, MA, 01801, USA
| | - Samuel Stewart
- Ethos Discovery, 10455 Sorrento Valley Road, Suite 101, San Diego, CA, 92121, USA
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Abril AG, Calo-Mata P, Böhme K, Villa TG, Barros-Velázquez J, Pazos M, Carrera M. Shotgun Proteomics Analysis, Functional Networks, and Peptide Biomarkers for Seafood-Originating Biogenic-Amine-Producing Bacteria. Int J Mol Sci 2023; 24:ijms24097704. [PMID: 37175409 PMCID: PMC10178689 DOI: 10.3390/ijms24097704] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 04/12/2023] [Accepted: 04/20/2023] [Indexed: 05/15/2023] Open
Abstract
Biogenic amine-producing bacteria are responsible for the production of basic nitrogenous compounds (histamine, cadaverine, tyramine, and putrescine) following the spoilage of food due to microorganisms. In this study, we adopted a shotgun proteomics strategy to characterize 15 foodborne strains of biogenic-amine-producing bacteria. A total of 10,673 peptide spectrum matches belonging to 4081 peptides and corresponding to 1811 proteins were identified. Relevant functional pathways were determined, and strains were differentiated into hierarchical clusters. An expected protein-protein interaction network was created (260 nodes/1973 interactions). Most of the determined proteins were associated with networks/pathways of energy, putrescine metabolism, and host-virus interaction. Additionally, 556 peptides were identified as virulence factors. Moreover, 77 species-specific peptide biomarkers corresponding to 64 different proteins were proposed to identify 10 bacterial species. This represents a major proteomic dataset of biogenic-amine-producing strains. These results may also be suitable for new treatments for food intoxication and for tracking microbial sources in foodstuffs.
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Affiliation(s)
- Ana González Abril
- Department of Food Technology, Spanish National Research Council (CSIC), Institute of Marine Research (IIM-CSIC), 36208 Vigo, Spain
- Department of Microbiology and Parasitology, Faculty of Pharmacy, University of Santiago de Compostela, 15898 Santiago de Compostela, Spain
| | - Pilar Calo-Mata
- Department of Analytical Chemistry, Nutrition and Food Science, Food Technology Division, School of Veterinary Sciences, University of Santiago de Compostela, Campus Lugo, 27002 Lugo, Spain
| | - Karola Böhme
- Department of Analytical Chemistry, Nutrition and Food Science, Food Technology Division, School of Veterinary Sciences, University of Santiago de Compostela, Campus Lugo, 27002 Lugo, Spain
| | - Tomás G Villa
- Department of Microbiology and Parasitology, Faculty of Pharmacy, University of Santiago de Compostela, 15898 Santiago de Compostela, Spain
| | - Jorge Barros-Velázquez
- Department of Analytical Chemistry, Nutrition and Food Science, Food Technology Division, School of Veterinary Sciences, University of Santiago de Compostela, Campus Lugo, 27002 Lugo, Spain
| | - Manuel Pazos
- Department of Food Technology, Spanish National Research Council (CSIC), Institute of Marine Research (IIM-CSIC), 36208 Vigo, Spain
| | - Mónica Carrera
- Department of Food Technology, Spanish National Research Council (CSIC), Institute of Marine Research (IIM-CSIC), 36208 Vigo, Spain
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17
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Etani T, Kondo S, Yanase T, Morikawa T, Aoki M, Gonda M, Tomiyama N, Nagai T, Iida K, Iwatsuki S, Taguchi K, Naiki T, Hamamoto S, Okada A, Kawai N, Nakamura A, Yasui T. Clinical characteristics of Raoultella ornithinolytica bacteremia and antimicrobial susceptibility of Raoultellaornithinolytica. J Infect Chemother 2023; 29:554-557. [PMID: 36738858 DOI: 10.1016/j.jiac.2023.01.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2022] [Revised: 01/20/2023] [Accepted: 01/30/2023] [Indexed: 02/05/2023]
Abstract
Raoultella ornithinolytica (R. ornithinolytica) is a gram-negative rod that was considered related to Klebsiella oxytoca and was classified as R. ornithinolytica in 2001. R. ornithinolytica is known as a histamine-producing bacterium that causes mackerel poisoning. Although only few clinical cases of R. ornithinolytica infection in humans have been reported, the number of diagnosed cases is expected to increase owing to the advancements in identification methods. In the present study, we performed a retrospective analysis of cases of R. ornithinolytica infection detected at our hospital. From September 2019 to July 2021, 62 specimens positive for R. ornithinolytica were obtained after removing duplicates. The clinical courses of these cases were investigated retrospectively based on electronic medical records. Of the 62 specimens, 24 were sputum, 19 were urine, three were stool, six were blood, four were bile, and six were other specimens. All the six blood culture specimens in which R. ornithinolytica was detected were from male patients, and the causative diseases were cholangitis in four cases and complicated pyelonephritis in two cases. Of these, two patients with cholangitis succumbed to death due to the worsening of underlying cancer. Identification of R. ornithinolytica is reportedly difficult, and some instruments may misidentify it as Klebsiella oxytoca. The prognosis of R. ornithinolytica infection has been reported to be good when susceptible drugs are used. However, high mortality rates were also reported despite the use of these drugs, suggesting the need for further investigation of clinical features of R. ornithinolytica infection.
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Affiliation(s)
- Toshiki Etani
- Department of Nephro-urology, Graduate School of Medical Sciences, Nagoya City University, Kawasumi 1, Mizuho-cho, Mizuho-ku, Nagoya, Aichi, 467-8601, Japan.
| | - Shuhei Kondo
- Division of Infection Prevention & Control, Nagoya City University Hospital, Kawasumi 1, Mizuho-cho, Mizuho-ku, Nagoya, Aichi, 467-8601, Japan.
| | - Takahiro Yanase
- Department of Nephro-urology, Graduate School of Medical Sciences, Nagoya City University, Kawasumi 1, Mizuho-cho, Mizuho-ku, Nagoya, Aichi, 467-8601, Japan.
| | - Toshiharu Morikawa
- Department of Nephro-urology, Graduate School of Medical Sciences, Nagoya City University, Kawasumi 1, Mizuho-cho, Mizuho-ku, Nagoya, Aichi, 467-8601, Japan.
| | - Maria Aoki
- Department of Nephro-urology, Graduate School of Medical Sciences, Nagoya City University, Kawasumi 1, Mizuho-cho, Mizuho-ku, Nagoya, Aichi, 467-8601, Japan.
| | - Masakazu Gonda
- Department of Nephro-urology, Graduate School of Medical Sciences, Nagoya City University, Kawasumi 1, Mizuho-cho, Mizuho-ku, Nagoya, Aichi, 467-8601, Japan.
| | - Nami Tomiyama
- Department of Nephro-urology, Graduate School of Medical Sciences, Nagoya City University, Kawasumi 1, Mizuho-cho, Mizuho-ku, Nagoya, Aichi, 467-8601, Japan.
| | - Takashi Nagai
- Department of Nephro-urology, Graduate School of Medical Sciences, Nagoya City University, Kawasumi 1, Mizuho-cho, Mizuho-ku, Nagoya, Aichi, 467-8601, Japan.
| | - Keitaro Iida
- Department of Nephro-urology, Graduate School of Medical Sciences, Nagoya City University, Kawasumi 1, Mizuho-cho, Mizuho-ku, Nagoya, Aichi, 467-8601, Japan.
| | - Shoichiro Iwatsuki
- Department of Nephro-urology, Graduate School of Medical Sciences, Nagoya City University, Kawasumi 1, Mizuho-cho, Mizuho-ku, Nagoya, Aichi, 467-8601, Japan.
| | - Kazumi Taguchi
- Department of Nephro-urology, Graduate School of Medical Sciences, Nagoya City University, Kawasumi 1, Mizuho-cho, Mizuho-ku, Nagoya, Aichi, 467-8601, Japan.
| | - Taku Naiki
- Department of Nephro-urology, Graduate School of Medical Sciences, Nagoya City University, Kawasumi 1, Mizuho-cho, Mizuho-ku, Nagoya, Aichi, 467-8601, Japan.
| | - Shuzo Hamamoto
- Department of Nephro-urology, Graduate School of Medical Sciences, Nagoya City University, Kawasumi 1, Mizuho-cho, Mizuho-ku, Nagoya, Aichi, 467-8601, Japan.
| | - Atsushi Okada
- Department of Nephro-urology, Graduate School of Medical Sciences, Nagoya City University, Kawasumi 1, Mizuho-cho, Mizuho-ku, Nagoya, Aichi, 467-8601, Japan.
| | - Noriyasu Kawai
- Department of Nephro-urology, Graduate School of Medical Sciences, Nagoya City University, Kawasumi 1, Mizuho-cho, Mizuho-ku, Nagoya, Aichi, 467-8601, Japan.
| | - Atsushi Nakamura
- Division of Infection Prevention & Control, Nagoya City University Hospital, Kawasumi 1, Mizuho-cho, Mizuho-ku, Nagoya, Aichi, 467-8601, Japan.
| | - Takahiro Yasui
- Department of Nephro-urology, Graduate School of Medical Sciences, Nagoya City University, Kawasumi 1, Mizuho-cho, Mizuho-ku, Nagoya, Aichi, 467-8601, Japan.
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Graham GD, Jeray KJ. Posttraumatic Patellar Osteomyelitis due to Raoultella ornithinolytica: A Case Report. JBJS Case Connect 2023; 13:01709767-202303000-00039. [PMID: 36795860 DOI: 10.2106/jbjs.cc.22.00590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
CASE A 59-year-old woman sustained a comminuted patellar fracture after a fall from standing. The injury was treated with open reduction and internal fixation 7 days from initial injury. Seven weeks postoperatively, she developed a swollen, painful, and draining knee. Workup demonstrated Raoultella ornithinolytica. She underwent surgical debridement and antibiotic treatment. CONCLUSION This is an unusual presentation of patellar osteomyelitis with R. ornithinolytica. Early identification, treatment with appropriate antimicrobial therapy, and consideration of surgical debridement are important in patients presenting with pain, swelling, and erythema after surgery.
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Affiliation(s)
- George D Graham
- Department of Orthopaedic Surgery, Prisma Health - Upstate, Greenville, South Carolina
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Nakamura-Silva R, de Sousa RC, Fujimoto RY, Pitondo-Silva A. Sewage from a secondary hospital in Ribeirão Preto, southeastern Brazil: a source of multidrug-resistant Enterobacteriaceae. ENVIRONMENTAL MONITORING AND ASSESSMENT 2022; 195:204. [PMID: 36527506 DOI: 10.1007/s10661-022-10830-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Accepted: 12/10/2022] [Indexed: 06/17/2023]
Abstract
Antimicrobial resistance is one of the severe threats to global health. Hospital sewage can serve as a reservoir for multi-resistant bacteria and promote the spread of antimicrobial resistance. This study aimed to investigate the antimicrobial susceptibility and the pathogenic potential of Enterobacteriaceae isolated from the sewage of a secondary hospital in Ribeirão Preto, a city in southeastern Brazil. The strains were isolated by membrane filtration and identified by matrix-assisted laser desorption ionization-time of flight (MALDI-TOF). The antimicrobial susceptibility profile was performed by disk diffusion. Polymerase chain reaction (PCR) assays were used to detect virulence genes among the strains. Twenty-eight isolates were obtained, with Klebsiella pneumoniae being the predominant species (71.4%, n = 20). All isolates were classified as multidrug-resistant, including four isolates that were non-susceptible to at least 50% of the tested antibiotics. All isolates were also non-susceptible to cefuroxime and sulfonamides antibiotics; however, they were susceptible to norfloxacin, ofloxacin, amikacin, gentamicin, netilmicin, ertapenem, cefazolin, cefaclor, and cefotetan. The virulence genes ycfM, fimH, mrkD, kfu, and entB were detected in several isolates. Our study showed that even in a secondary hospital, without the routine of major surgeries and intensive care admissions, the hospital sewage can harbor a high percentage of multidrug-resistant bacteria with pathogenic potential. This leads to the worrying risk of public health and environmental contamination.
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Affiliation(s)
- Rafael Nakamura-Silva
- Programa de Pós-Graduação em Tecnologia Ambiental, Universidade de Ribeirão Preto-UNAERP, Bloco J, Laboratório 1, Av. Costábile Romano, 2201, São Paulo 14096‑900, Ribeirânia, Ribeirão Preto, Brazil
| | - Ricardo Coelho de Sousa
- Empresa Brasileira de Pesquisa Agropecuária-EMBRAPA, Unidade Tabuleiros Costeios, Av. Beira Mar, 3250 Jardins, Sergipe, 49025040, Aracaju, Brazil
| | - Rodrigo Yudi Fujimoto
- Empresa Brasileira de Pesquisa Agropecuária-EMBRAPA, Unidade Tabuleiros Costeios, Av. Beira Mar, 3250 Jardins, Sergipe, 49025040, Aracaju, Brazil
| | - André Pitondo-Silva
- Programa de Pós-Graduação em Tecnologia Ambiental, Universidade de Ribeirão Preto-UNAERP, Bloco J, Laboratório 1, Av. Costábile Romano, 2201, São Paulo 14096‑900, Ribeirânia, Ribeirão Preto, Brazil.
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Detection and Antimicrobial Resistance of Enterobacteriaceae other than Escherichia Coli in Raccoons from the Madrid Region of Spain. J Vet Res 2022; 66:565-569. [PMID: 36846041 PMCID: PMC9944993 DOI: 10.2478/jvetres-2022-0058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Accepted: 10/18/2022] [Indexed: 11/06/2022] Open
Abstract
Introduction Raccoons are an invasive alien species widely distributed in the Madrid region of Spain. These animals can carry a variety of enteric bacteria with associated antimicrobial resistance, which can infect humans and livestock. However, to our knowledge, the presence of non-E. coli Enterobacteriaceae in raccoons has not been previously studied. Material and Methods We conducted a study to examine the species distribution of Enterobacteriaceae isolates other than E. coli, as well as their antimicrobial resistance, in the faeces of 83 raccoons in the Madrid region. Results We detected 12 Enterobacteriaceae isolates other than E. coli belonging to seven different species: Citrobacter freundii (1 isolate), Citrobacter gillenii (3 isolates), Citrobacter murliniae (1 isolate), Citrobacter portucalensis (2 isolates), Enterobacter hormaechei subsp. hoffmannii (1 isolate), Hafnia paralvei (2 isolates) and Raoultella ornithinolytica (2 isolates). These isolates were found in 7 of the 83 (8.4%) animals studied. To our knowledge, this study is the first report of the presence of non-E. coli Enterobacteriaceae in raccoon faeces. All isolates but one were resistant to at least one of the 14 antimicrobials tested. Resistance to ampicillin (83.3%), amoxicillinclavulanic acid (50%) and cefoxitin (33.3%) was the most frequent. Conclusion Our study indicates that raccoons are a potential source of infection with Enterobacteriaceae other than E. coli for humans and livestock in the Madrid region.
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Legese MH, Asrat D, Swedberg G, Hasan B, Mekasha A, Getahun T, Worku M, Shimber ET, Getahun S, Ayalew T, Gizachew B, Aseffa A, Mihret A. Sepsis: emerging pathogens and antimicrobial resistance in Ethiopian referral hospitals. Antimicrob Resist Infect Control 2022; 11:83. [PMID: 35698179 PMCID: PMC9195281 DOI: 10.1186/s13756-022-01122-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Accepted: 05/29/2022] [Indexed: 12/22/2022] Open
Abstract
Background Sepsis due to multidrug resistant (MDR) bacteria is a growing public health problem mainly in low-income countries.
Methods A multicenter study was conducted between October 2019 and September 2020 at four hospitals located in central (Tikur Anbessa and Yekatit 12), southern (Hawassa) and northern (Dessie) parts of Ethiopia. A total of 1416 patients clinically investigated for sepsis were enrolled. The number of patients from Tikur Anbessa, Yekatit 12, Dessie and Hawassa hospital was 501, 298, 301 and 316, respectively. At each study site, blood culture was performed from all patients and positive cultures were characterized by their colony characteristics, gram stain and conventional biochemical tests. Each bacterial species was confirmed using Matrix-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry (MALDI TOF). Antimicrobial resistance pattern of bacteria was determined by disc diffusion. Logistic regression analysis was used to assess associations of dependent and independent variables. A p-value < 0.05 was considered as statistically significant. The data was analyzed using SPSS version 25.
Results Among 1416 blood cultures performed, 40.6% yielded growth. Among these, 27.2%, 0.3% and 13.1%, were positive for pathogenic bacteria, yeast cells and possible contaminants respectively. Klebsiella pneumoniae (26.1%), Klebsiella variicola (18.1%) and E. coli (12.4%) were the most frequent. Most K. variicola were detected at Dessie (61%) and Hawassa (36.4%). Almost all Pantoea dispersa (95.2%) were isolated at Dessie. Rare isolates (0.5% or 0.2% each) included Leclercia adecarboxylata, Raoultella ornithinolytica, Stenotrophomonas maltophilia, Achromobacter xylosoxidans, Burkholderia cepacia, Kosakonia cowanii and Lelliottia amnigena. Enterobacteriaceae most often showed resistance to ampicillin (96.2%), ceftriaxone (78.3%), cefotaxime (78%), cefuroxime (78%) and ceftazidime (76.4%). MDR frequency of Enterobacteriaceae at Hawassa, Tikur Anbessa, Yekatit 12 and Dessie hospital was 95.1%, 93.2%, 87.3% and 67.7%, respectively. Carbapenem resistance was detected in 17.1% of K. pneumoniae (n = 111), 27.7% of E. cloacae (n = 22) and 58.8% of Acinetobacter baumannii (n = 34).
Conclusion Diverse and emerging gram-negative bacterial etiologies of sepsis were identified. High multidrug resistance frequency was detected. Both on sepsis etiology types and MDR frequencies, substantial variation between hospitals was determined. Strategies to control MDR should be adapted to specific hospitals. Standard bacteriological services capable of monitoring emerging drug-resistant sepsis etiologies are essential for effective antimicrobial stewardship.
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Nearly Complete Genome Sequence of Raoultella ornithinolytica Strain MQB_Silv_108, Carrying an Uncommon Extended-Spectrum-β-Lactamase-like blaBEL Gene. Microbiol Resour Announc 2022; 11:e0101222. [PMID: 36314936 PMCID: PMC9670947 DOI: 10.1128/mra.01012-22] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Raoultella ornithinolytica has become increasingly important in human diseases. Here, we report the nearly complete genome sequence of a multidrug-resistant strain, R. ornithinolytica MQB_Silv_108, which was isolated from the effluent from a domestic wastewater treatment plant in Spain. Therefore, its release into the environment poses a possible exposure risk for humans and animals.
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23
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Bray JE, Correia A, Varga M, Jolley KA, Maiden MCJ, Rodrigues CMC. Ribosomal MLST nucleotide identity (rMLST-NI), a rapid bacterial species identification method: application to Klebsiella and Raoultella genomic species validation. Microb Genom 2022; 8. [PMID: 36098501 PMCID: PMC9676034 DOI: 10.1099/mgen.0.000849] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022] Open
Abstract
Bacterial genomics is making an increasing contribution to the fields of medicine and public health microbiology. Consequently, accurate species identification of bacterial genomes is an important task, particularly as the number of genomes stored in online databases increases rapidly and new species are frequently discovered. Existing database entries require regular re-evaluation to ensure that species annotations are consistent with the latest species definitions. We have developed an automated method for bacterial species identification that is an extension of ribosomal multilocus sequence typing (rMLST). The method calculates an ‘rMLST nucleotide identity’ (rMLST-NI) based on the nucleotides present in the protein-encoding ribosomal genes derived from bacterial genomes. rMLST-NI was used to validate the species annotations of 11839 publicly available Klebsiella and Raoultella genomes based on a comparison with a library of type strain genomes. rMLST-NI was compared with two whole-genome average nucleotide identity methods (OrthoANIu and FastANI) and the k-mer based Kleborate software. The results of the four methods agreed across a dataset of 11839 bacterial genomes and identified a small number of entries (n=89) with species annotations that required updating. The rMLST-NI method was 3.5 times faster than Kleborate, 4.5 times faster than FastANI and 1600 times faster than OrthoANIu. rMLST-NI represents a fast and generic method for species identification using type strains as a reference.
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Affiliation(s)
- James E Bray
- Department of Zoology, University of Oxford, Oxford, UK
| | - Annapaula Correia
- Department of Zoology, University of Oxford, Oxford, UK.,Department of Veterinary Medicine, University of Cambridge, Cambridge, UK.,Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, UK
| | | | | | | | - Charlene M C Rodrigues
- Department of Zoology, University of Oxford, Oxford, UK.,Department of Infection Biology, London School of Hygiene and Tropical Medicine, London, UK.,Department of Paediatrics, Imperial College Healthcare NHS Trust, London, UK
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Zou H, Berglund B, Wang S, Zhou Z, Gu C, Zhao L, Meng C, Li X. Emergence of bla NDM-1, bla NDM-5, bla KPC-2 and bla IMP-4 carrying plasmids in Raoultella spp. in the environment. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 306:119437. [PMID: 35537555 DOI: 10.1016/j.envpol.2022.119437] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 05/02/2022] [Accepted: 05/05/2022] [Indexed: 06/14/2023]
Abstract
To date, carbapenem-resistant Enterobacteriaceae have been found predominantly in clinical settings worldwide. Raoultella belongs to the Enterobacteriaceae family which can cause hospital-acquired infections, and carbapenem-resistant Raoultella spp. (CRR) is sporadically reported in the environment. We investigated the distribution and underlying resistance mechanisms of CRR in a wastewater treatment plant (WWTP) from eastern China between January 2018 and February 2019. A total of 17 CRR were isolated from 324 environmental samples, including Raoultella ornithinolytica (n = 15) and Raoultella planticola (n = 2). The detection of CRR was more frequent in the water inlet compared to anaerobic tank, aerobic tank, sludge thickener, activated sludge, mud cake storage area, and water outlet, and CRR was detected in mud cake stacking area. All CRR were resistant to imipenem, meropenem, ampicillin, piperacillin-tazobactam, cefotaxime, ceftazidime, trimethoprim-sulfamethoxazole and fosfomycin. Four different carbapenemase genes were identified, including blaKPC-2 (n = 13), blaNDM-1 (n = 8), blaNDM-5 (n = 1), blaIMP-4 (n = 1). Interestingly, isolated R. ornithinolytica from the WWTP were closely related to those reported from human samples in China. Plasmid analysis indicated that IncFII(Yp), IncP6, and IncU mediated blaKPC-2 spread, IncX3 and IncN2 mediated blaNDM spread in the environment. The core structure of the Tn3-ISKpn27-blaKPC-2-ISKpn6, ISAba125-blaNDM-bleMBL-trpF-dsbD were identified. The study provides evidence that Raoultella spp. may spread alarming carbapenem resistance in the environment and, therefore, the continuous surveillance for carbapenem resistance in the WWTP should be conducted, especially sludge.
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Affiliation(s)
- Huiyun Zou
- Department of Environment and Health, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Björn Berglund
- Department of Clinical and Experimental Medicine, Linköping University, 581 85, Linköping, Sweden
| | - Shuang Wang
- Institute of Infection Disease Control, Shandong Centre for Disease Control and Prevention, Jinan, China
| | - Ziyu Zhou
- Department of Environment and Health, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Congcong Gu
- Department of Environment and Health, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Ling Zhao
- Department of Environment and Health, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Chen Meng
- Department of Environment and Health, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China
| | - Xuewen Li
- Department of Environment and Health, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, Shandong, 250012, China.
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Goodman DT, Murphy D, Dorairaj J. Case Study: Soft Tissue Infection with Raoultella ornithinolytica. JPRAS Open 2022; 33:17-20. [PMID: 35633992 PMCID: PMC9133572 DOI: 10.1016/j.jpra.2022.04.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Accepted: 04/23/2022] [Indexed: 11/25/2022] Open
Abstract
Raoultella ornithinolytica is a rare encapsulated Gram-negative aerobic and facultative anaerobic rod belonging to the Enterobacteriaceae family. It tends to inhabit water and soil environments and can be found on insects, fish, ticks, and termites, but can also found in the hospital environment.1,2R ornithinolytica has been documented in respiratory, urinary, gastrointestinal, and biliary tract infections as well as bacteraemia and systemic infections but has rarely been documented in soft tissue infections.2 This case study describes a recurrent paronychia infection secondary to R ornithinolytica in a young woman not responding to antibiotics and successfully treated with surgical management.
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Boutet E, Djerroud S, Perreault J. Small RNAs beyond Model Organisms: Have We Only Scratched the Surface? Int J Mol Sci 2022; 23:ijms23084448. [PMID: 35457265 PMCID: PMC9029176 DOI: 10.3390/ijms23084448] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Revised: 04/14/2022] [Accepted: 04/15/2022] [Indexed: 01/27/2023] Open
Abstract
Small RNAs (sRNAs) are essential regulators in the adaptation of bacteria to environmental changes and act by binding targeted mRNAs through base complementarity. Approximately 550 distinct families of sRNAs have been identified since their initial characterization in the 1980s, accelerated by the emergence of RNA-sequencing. Small RNAs are found in a wide range of bacterial phyla, but they are more prominent in highly researched model organisms compared to the rest of the sequenced bacteria. Indeed, Escherichia coli and Salmonella enterica contain the highest number of sRNAs, with 98 and 118, respectively, with Enterobacteriaceae encoding 145 distinct sRNAs, while other bacteria families have only seven sRNAs on average. Although the past years brought major advances in research on sRNAs, we have perhaps only scratched the surface, even more so considering RNA annotations trail behind gene annotations. A distinctive trend can be observed for genes, whereby their number increases with genome size, but this is not observable for RNAs, although they would be expected to follow the same trend. In this perspective, we aimed at establishing a more accurate representation of the occurrence of sRNAs in bacteria, emphasizing the potential for novel sRNA discoveries.
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Unraveling the Tropaeolum majus L. (Nasturtium) Root-Associated Bacterial Community in Search of Potential Biofertilizers. Microorganisms 2022; 10:microorganisms10030638. [PMID: 35336212 PMCID: PMC8950702 DOI: 10.3390/microorganisms10030638] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Revised: 03/14/2022] [Accepted: 03/15/2022] [Indexed: 01/27/2023] Open
Abstract
Although Tropaeolum majus (nasturtium) is an agriculturally and economically important plant, especially due to the presence of edible flowers and its medicinal properties, its microbiome is quite unexplored. Here, the structure of the total bacterial community associated with the rhizosphere, endosphere and bulk soil of T. majus was determined by 16S rRNA amplicon metagenomic sequencing. A decrease in diversity and richness from bulk soil to the rhizosphere and from the rhizosphere to the endosphere was observed in the alpha diversity analyses. The phylum Proteobacteria was the most dominant in the bacteriome of the three sites evaluated, whereas the genera Pseudomonas and Ralstonia showed a significantly higher relative abundance in the rhizosphere and endosphere communities, respectively. Plant growth-promoting bacteria (236 PGPB) were also isolated from the T. majus endosphere, and 76 strains belonging to 11 different genera, mostly Serratia, Raoultella and Klebsiella, showed positive results for at least four out of six plant growth-promoting tests performed. The selection of PGPB associated with T. majus can result in the development of a biofertilizer with activity against phytopathogens and capable of favoring the development of this important plant.
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Khaira MB, Yusuf MB, Khan F. Insights to antimicrobial resistance: heavy metals can inhibit antibiotic resistance in bacteria isolated from wastewater. ENVIRONMENTAL MONITORING AND ASSESSMENT 2022; 194:252. [PMID: 35254524 DOI: 10.1007/s10661-022-09917-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Accepted: 02/28/2022] [Indexed: 06/14/2023]
Abstract
The alarming upsurge in the co-existence of heavy metal and antibiotic resistance may have a devastating impact on humans, animals, and the environment. Four metal-resistant bacteria were isolated from hospital effluents and industrial drain. Heavy metal resistance and antimicrobial resistance were examined in the isolates followed by identification through 16S rRNA gene sequencing. Delftia tsuruhatensis strain FK-01 and Carnobacterium inhibens strain FK-02 tolerated arsenic with maximal tolerated concentration (MTC) of 30 mM and 10 mM, respectively. Staphylococcus hominis strain FK-04 tolerated copper up to 4 mM and lead-resistant Raoultella ornithinolytica strain FK-05 exhibited tolerance to 1 mM lead. The growth kinetics of bacteria were monitored in the presence of metals and the following antibiotics, tetracycline, chloramphenicol, and kanamycin. The presence of arsenate significantly enhanced tetracycline resistance in C. inhibens. Heavy metal-induced antibiotic resistance was also observed in S. hominis and R. ornithinolytica, against chloramphenicol and tetracycline respectively. D. tsuruhatensis showed resistance to kanamycin but when grown in the presence of arsenic and kanamycin, bacteria lost resistance to the antibiotic. Therefore, it is suggested that the novel arsenate-resistant strain Delftia tsuruhatensis FK-01 has a unique ability to inhibit antimicrobial resistance that can be harnessed in bioremediation.
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Affiliation(s)
- Massab Bashir Khaira
- Functional Genomics Laboratory, Department of Biosciences, COMSATS University Islamabad, Islamabad, 45550, Pakistan
| | - Muhammad Bilal Yusuf
- Functional Genomics Laboratory, Department of Biosciences, COMSATS University Islamabad, Islamabad, 45550, Pakistan
| | - Fariha Khan
- Functional Genomics Laboratory, Department of Biosciences, COMSATS University Islamabad, Islamabad, 45550, Pakistan.
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Valiatti TB, Santos FF, Nunes PHS, Streling AP, Veiga R, Cayô R, Gales AC, Gomes TAT. Decreased susceptibility to imipenem and ceftazidime in early virulent Raoultella spp. strains retrieved from human intestinal infections. Braz J Microbiol 2022; 53:785-789. [PMID: 35138632 PMCID: PMC9151967 DOI: 10.1007/s42770-022-00699-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Accepted: 02/01/2022] [Indexed: 02/01/2023] Open
Abstract
The genus Raoultella spp. is comprised of four species, namely, R. electrica, R. ornithinolytica, R. planticola, and R. terrigena, which are rarely reported to cause infections in humans. This study aimed to characterize six strains of Raoultella spp. isolated from stool samples from patients with diarrhea. The strains included in the study were previously identified by biochemical methods as K. pneumoniae, during a surveillance study conducted in 1987. In the present study, the strains were re-identified by MALDI TOF and 16S rRNA sequencing and subsequently subjected to virulence gene screening by PCR, hemolytic activity, biofilm formation, hypermucoviscosity phenotype, capacity to interact with Caco-2 cells, and antimicrobial susceptibility test. Our results revealed that, among the six strains, three were identified as R. ornithinolytica and three as R. planticola. The genes related to iron uptake systems (aero1, aero2, iutA, entB, and ybtS) and adhesin (mrkD) were found in all strains. Furthermore, all strains demonstrated the ability to interact in vitro with Caco-2 cells and form biofilms. In general, the strains studied were sensitive to the antimicrobials tested; however, it was possible to observe high MICs for imipenem compared to ertapenem and meropenem and high minimal inhibitory concentrations (MICs) for ceftazidime, except for one strain. Our results show the occurrence of virulent strains of Raoultella spp. with high MICs for imipenem and ceftazidime causing diarrhea. We hope that our findings can contribute to the understanding of the evolution of this species since, as far as we know, these are the oldest isolates reported so far.
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Affiliation(s)
- Tiago Barcelos Valiatti
- Laboratório Experimental de Patogenicidade de Enterobactérias (LEPE), Disciplina de Microbiologia, Departamento de Microbiologia, Imunologia e Parasitologia (DMIP), Escola Paulista de Medicina (EPM), Universidade Federal de São Paulo (UNIFESP), São Paulo, SP, Brazil. .,Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina (EPM), Universidade Federal de São Paulo (UNIFESP), São Paulo, SP, Brazil.
| | - Fernanda Fernandes Santos
- Laboratório Experimental de Patogenicidade de Enterobactérias (LEPE), Disciplina de Microbiologia, Departamento de Microbiologia, Imunologia e Parasitologia (DMIP), Escola Paulista de Medicina (EPM), Universidade Federal de São Paulo (UNIFESP), São Paulo, SP Brazil ,Present Address: Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina (EPM), Universidade Federal de São Paulo (UNIFESP), São Paulo, SP Brazil
| | - Pedro Henrique Soares Nunes
- Laboratório Experimental de Patogenicidade de Enterobactérias (LEPE), Disciplina de Microbiologia, Departamento de Microbiologia, Imunologia e Parasitologia (DMIP), Escola Paulista de Medicina (EPM), Universidade Federal de São Paulo (UNIFESP), São Paulo, SP Brazil
| | - Ana Paula Streling
- Present Address: Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina (EPM), Universidade Federal de São Paulo (UNIFESP), São Paulo, SP Brazil
| | - Ruanita Veiga
- Present Address: Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina (EPM), Universidade Federal de São Paulo (UNIFESP), São Paulo, SP Brazil
| | - Rodrigo Cayô
- Present Address: Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina (EPM), Universidade Federal de São Paulo (UNIFESP), São Paulo, SP Brazil ,Laboratório de Imunologia e Microbiologia (LIB), Setor de Biologia Molecular, Microbiologia e Imunologia, Departamento de Ciências Biológicas (DCB), Instituto de Ciências Ambientais Químicas e Farmacêuticas (ICAQF), Universidade Federal de São Paulo (UNIFESP), Diadema, SP Brazil
| | - Ana Cristina Gales
- Present Address: Laboratório Alerta, Division of Infectious Diseases, Department of Internal Medicine, Escola Paulista de Medicina (EPM), Universidade Federal de São Paulo (UNIFESP), São Paulo, SP Brazil
| | - Tânia Aparecida Tardelli Gomes
- Laboratório Experimental de Patogenicidade de Enterobactérias (LEPE), Disciplina de Microbiologia, Departamento de Microbiologia, Imunologia e Parasitologia (DMIP), Escola Paulista de Medicina (EPM), Universidade Federal de São Paulo (UNIFESP), São Paulo, SP, Brazil.
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Tayo A, Nyame K. Sepsis From Multisystem Infection With Multidrug-Resistant Raoultella ornithinolytica. Cureus 2022; 14:e20975. [PMID: 35154953 PMCID: PMC8816680 DOI: 10.7759/cureus.20975] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/04/2022] [Indexed: 11/13/2022] Open
Abstract
Raoultella (R.) ornithinolytica is a gram-negative, encapsulated aerobe or facultative anaerobe belonging to the family Enterobacteriaceae. It is distinguished from other members in the family with a negative indole test, growth at 10oC, production of histamine, a negative D-melezitose test, and metabolism of ornithine. R. ornithinolytica is a versatile organism found in different habitats, including soil, water, and plants, as well as colonizing the human gastrointestinal tract and throat. It was considered to cause opportunistic infection in humans but is increasingly being implicated in infections in immunocompetent individuals. Raoultella ornithinolytica causes infection in different clinical settings. Sepsis from Raoultella ornithinolytica is increasing among humans, and it is considered an emerging infectious agent in both immunocompromised and immunocompetent people. There is an increasing level of antibiotic resistance among isolates with reports of multidrug resistance. We report the case of a 95-year-old man with multidrug-resistant R. ornithinolytica multisystem infection and review the literature.
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Suito T, Watanabe Y, Saito H, Watanabe T, Ikeda H. Urinary tract infections due to Raoultella ornithinolytica detected in a kitchen. Pediatr Int 2022; 64:e15210. [PMID: 35791049 DOI: 10.1111/ped.15210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Revised: 03/22/2022] [Accepted: 04/04/2022] [Indexed: 01/05/2023]
Affiliation(s)
- Tatsuya Suito
- Children's Medical Center, Showa University Northern Yokohama Hospital, Yokohama-shi, Japan
| | - Yoshitaka Watanabe
- Children's Medical Center, Showa University Northern Yokohama Hospital, Yokohama-shi, Japan
| | - Hideka Saito
- Children's Medical Center, Showa University Northern Yokohama Hospital, Yokohama-shi, Japan
| | - Tsuneki Watanabe
- Children's Medical Center, Showa University Northern Yokohama Hospital, Yokohama-shi, Japan
| | - Hirokazu Ikeda
- Children's Medical Center, Showa University Northern Yokohama Hospital, Yokohama-shi, Japan
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Costa CFFA, Merino-Ribas A, Ferreira C, Campos C, Silva N, Pereira L, Garcia A, Azevedo Á, Mesquita RBR, Rangel AOSS, Manaia CM, Sampaio-Maia B. Characterization of Oral Enterobacteriaceae Prevalence and Resistance Profile in Chronic Kidney Disease Patients Undergoing Peritoneal Dialysis. Front Microbiol 2022; 12:736685. [PMID: 34970231 PMCID: PMC8713742 DOI: 10.3389/fmicb.2021.736685] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Accepted: 11/10/2021] [Indexed: 11/28/2022] Open
Abstract
Chronic Kidney Disease (CKD) is a growing public-health concern worldwide. Patients exhibit compromised immunity and are more prone to infection than other populations. Therefore, oral colonization by clinically relevant members of the Enterobacteriaceae family, major agents of both nosocomial and dialysis-associated infections with frequent prevalence of antibiotic resistances, may constitute a serious risk. Thus, this study aimed to assess the occurrence of clinically relevant enterobacteria and their antibiotic resistance profiles in the oral cavity of CKD patients undergoing peritoneal dialysis (CKD-PD) and compare it to healthy controls. Saliva samples from all the participants were cultured on MacConkey Agar and evaluated regarding the levels of urea, ammonia, and pH. Bacterial isolates were identified and characterized for antibiotic resistance phenotype and genotype. The results showed that CKD-PD patients exhibited significantly higher salivary pH, urea, and ammonia levels than controls, that was accompanied by higher prevalence and diversity of oral enterobacteria. Out of all the species isolated, only the prevalence of Raoultella ornithinolytica varied significantly between groups, colonizing the oral cavity of approximately 30% of CKD-PD patients while absent from controls. Antibiotic resistance phenotyping revealed mostly putative intrinsic resistance phenotypes (to amoxicillin, ticarcillin, and cephalothin), and resistance to sulfamethoxazole (~43% of isolates) and streptomycin (~17%). However, all isolates were resistant to at least one of the antibiotics tested and multidrug resistance isolates were only found in CKD-PD group (31,6%). Mobile genetic elements and resistance genes were detected in isolates of the species Raoultella ornithinolytica, Klebsiella pneumoniae, Klebsiella oxytoca, Escherichia coli, and Enterobacter asburiae, mostly originated from CKD-PD patients. PD-related infection history revealed that Enterobacteriaceae were responsible for ~8% of peritonitis and ~ 16% of exit-site infections episodes in CKD-PD patients, although no association was found to oral enterobacteria colonization at the time of sampling. The results suggest that the CKD-induced alterations of the oral milieu might promote a dysbiosis of the commensal oral microbiome, namely the proliferation of clinically relevant Enterobacteriaceae potentially harboring acquired antibiotic resistance genes. This study highlights the importance of the oral cavity as a reservoir for pathobionts and antibiotic resistances in CKD patients undergoing peritoneal dialysis.
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Affiliation(s)
- Carolina F F A Costa
- Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Porto, Portugal.,Nephrology & Infectious Diseases R&D Group, INEB - Instituto de Engenharia Biomédica, i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
| | - Ana Merino-Ribas
- Nephrology & Infectious Diseases R&D Group, INEB - Instituto de Engenharia Biomédica, i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal.,Nephrology Department, Hospital Universitari Doctor Josep Trueta, Girona, Spain
| | - Catarina Ferreira
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Porto, Portugal
| | - Carla Campos
- Instituto Português de Oncologia do Porto Francisco Gentil (IPO), Porto, Portugal
| | - Nádia Silva
- Nephrology Department, Centro Hospitalar Universitário de São João, Porto, Portugal
| | - Luciano Pereira
- Nephrology & Infectious Diseases R&D Group, INEB - Instituto de Engenharia Biomédica, i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal.,Nephrology Department, Centro Hospitalar Universitário de São João, Porto, Portugal
| | - Andreia Garcia
- Nephrology & Infectious Diseases R&D Group, INEB - Instituto de Engenharia Biomédica, i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal
| | - Álvaro Azevedo
- Faculdade de Medicina Dentária, Universidade do Porto, Porto, Portugal.,Laboratório para a Investigação Integrativa e Translacional em Saúde Populacional (ITR), Porto, Portugal
| | - Raquel B R Mesquita
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Porto, Portugal
| | - António O S S Rangel
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Porto, Portugal
| | - Célia M Manaia
- Universidade Católica Portuguesa, CBQF - Centro de Biotecnologia e Química Fina - Laboratório Associado, Escola Superior de Biotecnologia, Porto, Portugal
| | - Benedita Sampaio-Maia
- Nephrology & Infectious Diseases R&D Group, INEB - Instituto de Engenharia Biomédica, i3S - Instituto de Investigação e Inovação em Saúde, Universidade do Porto, Porto, Portugal.,Faculdade de Medicina Dentária, Universidade do Porto, Porto, Portugal
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Seixas R, Alves A, Selaru A, Vanzeller M, Shiang T, Conde S. Raoultella ornithinolytica in MALT-type non-Hodgkin Lymphoma. Eur J Case Rep Intern Med 2021; 8:003023. [PMID: 34912750 PMCID: PMC8668008 DOI: 10.12890/2021_003023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Accepted: 10/30/2021] [Indexed: 11/08/2022] Open
Abstract
Raoultella ornithinolytica is a bacterium that belongs to the Enterobacteriaceae family. The most frequently reported infections are gastrointestinal and hepatobiliary. Urinary tract infections are very rarely reported and bloodstream infections are usually reported without an identified source. This bacterium is responsible for an increasing number of infections, especially in immunocompromised patients. The authors describe the first case ever reported of an immunocompromised patient due to non-Hodgkin lymphoma MALT type and corticotherapy, who developed urinary tract infection and subsequently bacteriemia due to this pathogen.
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Affiliation(s)
- Rui Seixas
- Internal Medicine Department, Unidade Local de Saúde Litoral Alentejano, Santiago do Cacém, Portugal
| | - Adelaide Alves
- Pulmonology Department, Centro Hospitalar Vila Nova de Gaia e Espinho, Portugal
| | - Aurelia Selaru
- Clinical Pathology Department, Centro Hospitalar Vila Nova de Gaia e Espinho, Portugal
| | - Manuela Vanzeller
- Pulmonology Department, Centro Hospitalar Vila Nova de Gaia e Espinho, Portugal
| | - Teresa Shiang
- Pulmonology Department, Centro Hospitalar Vila Nova de Gaia e Espinho, Portugal
| | - Sara Conde
- Pulmonology Department, Centro Hospitalar Vila Nova de Gaia e Espinho, Portugal
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Gómez M, Valverde A, del Campo R, Rodríguez JM, Maldonado-Barragán A. Phenotypic and Molecular Characterization of Commensal, Community-Acquired and Nosocomial Klebsiella spp. Microorganisms 2021; 9:2344. [PMID: 34835469 PMCID: PMC8625991 DOI: 10.3390/microorganisms9112344] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2021] [Revised: 11/09/2021] [Accepted: 11/09/2021] [Indexed: 11/17/2022] Open
Abstract
Klebsiella spp. is a relevant pathogen that can present acquired resistance to almost all available antibiotics, thus representing a serious threat for public health. While most studies have been focused on isolates causing community-acquired and nosocomial infections, little is known about the commensal isolates colonizing healthy subjects. We describe the molecular identification and the phenotypic characterization of commensal Klebsiella spp. from breast milk of healthy women and faeces from healthy breast-fed infants, which were compared with isolates from community-acquired infections and from a nosocomial NICU outbreak. The phylogenetic analysis of a 454-bp sequence of the rpoB gene was useful for species identification (K. pneumoniae, K. variicola, K. quasipneumoniae, K. oxytoca, K. grimontii, K. michiganensis, Raoultella planticola and R. ornithinolytica), previously misidentified as K. pneumoniae or K. oxytoca by biochemical methods. Globally, we report that commensal strains present virulence traits (virulence genes, siderophores and biofilms) comparable to community-acquired and NICU-infective isolates, thus suggesting that the human microbiota could constitute a reservoir for infection. Isolates causing NICU outbreak were multi-drug resistant (MDR) and ESBLs producers, although an imipenem-resistant commensal MDR K. quasipneumoniae isolate was also found. A commensal K. pneumoniae strain showed a potent bacteriocin-like inhibitory activity against MDR Klebsiella isolates, thus highlighting the potential role of commensal Klebsiella spp. in health and disease.
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Affiliation(s)
- Marta Gómez
- Department of Nutrition and Food Science, Complutense University of Madrid, 28040 Madrid, Spain; (M.G.); (J.M.R.)
| | - Arancha Valverde
- Department of Microbiology, Hospital Universitario Ramón y Cajal IRYCIS, 28034 Madrid, Spain; (A.V.); (R.d.C.)
| | - Rosa del Campo
- Department of Microbiology, Hospital Universitario Ramón y Cajal IRYCIS, 28034 Madrid, Spain; (A.V.); (R.d.C.)
| | - Juan Miguel Rodríguez
- Department of Nutrition and Food Science, Complutense University of Madrid, 28040 Madrid, Spain; (M.G.); (J.M.R.)
| | - Antonio Maldonado-Barragán
- Department of Nutrition and Food Science, Complutense University of Madrid, 28040 Madrid, Spain; (M.G.); (J.M.R.)
- Infection and Global Health Research Division, School of Medicine, University of St. Andrews, North Haugh, St Andrews KY16 9TF, UK
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A case report of community-acquired Raoultella ornithinolytica infection in a healthy, young individual. BMC Infect Dis 2021; 21:1095. [PMID: 34689741 PMCID: PMC8542406 DOI: 10.1186/s12879-021-06799-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Accepted: 10/15/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Raoultella ornithinolytica is a Gram-negative bacillus that resembles Klebsiella. This bacterium is present in many soil and aquatic environments and is a major causative agent of healthcare-associated infections (HAIs) in medical staff. Clinically, it has been reported to contribute to nosocomial infections in patients that include but are not limited to gastrointestinal, skin, and genitourinary tract infections. These complications are most common in hospitalized patients with underlying immunodeficiency, multiple comorbidities, or those receiving invasive surgery. CASE PRESENTATION We present a case of a 25-year-old patient with a R. ornithinolytica infection. The patient had no history of any disease. Her main complaints were high fever, a scattered maculopapular rash, and superficial lymph node enlargement (SLNE). Peripheral blood samples were collected for high-throughput sequencing analysis to identify pathogenic microorganisms. The results confirmed a R. ornithinolytica infection, which was treated successfully using meropenem. Loratadine was also administered to treat the patient's compromised skin condition caused by an allergic reaction. CONCLUSIONS To our knowledge, this is the first case of a systemic maculopapular rash and superficial lymphadenopathy caused by a R. ornithinolytica infection acquired at the community level. Based on this case, we recommend a combination of antibiotic and antiallergic drugs to treat a R. ornithinolytica infection and associated allergic reaction to the bacteria.
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Neonatal Community-acquired Raoultella Ornithinolytica Septicemia: A Case Report and Review of the Literature. Pediatr Infect Dis J 2021; 40:e370-e373. [PMID: 34260488 DOI: 10.1097/inf.0000000000003197] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Raoultella ornithinolytica is an opportunistic, aquaphilic and Gram-negative bacterium. Immune deficiency states and indwelling catheters provide a basis for most of the infections arising. R. ornithinolytica septicemia (ROS) is extremely rare in neonates but can be life threatening. Community-acquired ROS has not been described in neonates before. The diagnosis of neonatal septicemia is occasionally complicated by unusual clinical presentations. Pyloric stenosis is manifested by projectile, nonbilious vomiting and late findings, including weight loss, dehydration and electrolyte abnormalities beyond 4-6 weeks old. Community-acquired neonatal septicemia symptoms can sometimes be confused with symptoms of gastrointestinal obstructions in patients without risk factors for sepsis. Early diagnosis and appropriate antibiotics are essentials for a good prognosis in neonatal septicemia. Herein, we present a novel case of community-acquired ROS with an unusual presentation in a term infant and a review of the literature about ROS in the neonatal period.
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Salgueiro V, Reis L, Ferreira E, Botelho MJ, Manageiro V, Caniça M. Assessing the Bacterial Community Composition of Bivalve Mollusks Collected in Aquaculture Farms and Respective Susceptibility to Antibiotics. Antibiotics (Basel) 2021; 10:antibiotics10091135. [PMID: 34572717 PMCID: PMC8468174 DOI: 10.3390/antibiotics10091135] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 09/09/2021] [Accepted: 09/17/2021] [Indexed: 11/16/2022] Open
Abstract
Aquaculture is a growing sector, providing several products for human consumption, and it is therefore important to guarantee its quality and safety. This study aimed to contribute to the knowledge of bacterial composition of Crassostrea gigas, Mytilus spp. and Ruditapes decussatus, and the antibiotic resistances/resistance genes present in aquaculture environments. Two hundred and twenty-two bacterial strains were recovered from all bivalve mollusks samples belonging to the Aeromonadaceae, Bacillaceae, Comamonadaceae, Enterobacteriaceae, Enterococcaceae, Micrococcaceae, Moraxellaceae, Morganellaceae, Pseudomonadaceae, Shewanellaceae, Staphylococcaceae, Streptococcaceae, Vibrionaceae, and Yersiniaceae families. Decreased susceptibility to oxytetracycline prevails in all bivalve species, aquaculture farms and seasons. Decreased susceptibilities to amoxicillin, amoxicillin/clavulanic acid, cefotaxime, cefoxitin, ceftazidime, chloramphenicol, florfenicol, colistin, ciprofloxacin, flumequine, nalidixic acid and trimethoprim/sulfamethoxazole were also found. This study detected six qnrA genes among Shewanella algae, ten qnrB genes among Citrobacter spp. and Escherichia coli, three oqxAB genes from Raoultella ornithinolytica and blaTEM-1 in eight E. coli strains harboring a qnrB19 gene. Our results suggest that the bacteria and antibiotic resistances/resistance genes present in bivalve mollusks depend on several factors, such as host species and respective life stage, bacterial family, farm’s location and season, and that is important to study each aquaculture farm individually to implement the most suitable measures to prevent outbreaks.
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Affiliation(s)
- Vanessa Salgueiro
- National Reference Laboratory of Antibiotic Resistances and Healthcare Associated Infections, Department of Infectious Diseases, National Institute of Health Dr. Ricardo Jorge, 1649-016 Lisbon, Portugal; (V.S.); (L.R.); (E.F.); (V.M.)
- Centre for the Studies of Animal Science, Institute of Agrarian and Agri-Food Sciences and Technologies, University of Porto, 4051-401 Porto, Portugal
| | - Lígia Reis
- National Reference Laboratory of Antibiotic Resistances and Healthcare Associated Infections, Department of Infectious Diseases, National Institute of Health Dr. Ricardo Jorge, 1649-016 Lisbon, Portugal; (V.S.); (L.R.); (E.F.); (V.M.)
| | - Eugénia Ferreira
- National Reference Laboratory of Antibiotic Resistances and Healthcare Associated Infections, Department of Infectious Diseases, National Institute of Health Dr. Ricardo Jorge, 1649-016 Lisbon, Portugal; (V.S.); (L.R.); (E.F.); (V.M.)
- Centre for the Studies of Animal Science, Institute of Agrarian and Agri-Food Sciences and Technologies, University of Porto, 4051-401 Porto, Portugal
| | - Maria João Botelho
- Division of Oceanography and Marine Environment, Portuguese Institute for the Sea and Atmosphere, 1749-077 Lisbon, Portugal;
- CIIMAR, Interdisciplinary Centre of Marine and Environmental Research, University of Porto, 4450-208 Matosinhos, Portugal
| | - Vera Manageiro
- National Reference Laboratory of Antibiotic Resistances and Healthcare Associated Infections, Department of Infectious Diseases, National Institute of Health Dr. Ricardo Jorge, 1649-016 Lisbon, Portugal; (V.S.); (L.R.); (E.F.); (V.M.)
- Centre for the Studies of Animal Science, Institute of Agrarian and Agri-Food Sciences and Technologies, University of Porto, 4051-401 Porto, Portugal
| | - Manuela Caniça
- National Reference Laboratory of Antibiotic Resistances and Healthcare Associated Infections, Department of Infectious Diseases, National Institute of Health Dr. Ricardo Jorge, 1649-016 Lisbon, Portugal; (V.S.); (L.R.); (E.F.); (V.M.)
- Centre for the Studies of Animal Science, Institute of Agrarian and Agri-Food Sciences and Technologies, University of Porto, 4051-401 Porto, Portugal
- CIISA, Center for Interdisciplinary Research in Animal Health, Faculty of Veterinary Medicine, University of Lisbon, 1300-477 Lisbon, Portugal
- Correspondence:
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Cortés-Ortíz IA, Mendieta-Condado E, Escobar-Escamilla N, Juárez-Gómez JC, Garcés-Ayala F, Rodriguez AA, Bravata-Alcántara JC, Gutiérrez-Muñoz VH, Bello-López JM, Ramírez–González JE. Multidrug-resistant Raoultella ornithinolytica misidentified as Klebsiella oxytoca carrying blaOXA β-lactamases: antimicrobial profile and genomic characterization. Arch Microbiol 2021; 203:5755-5761. [DOI: 10.1007/s00203-021-02515-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Revised: 08/03/2021] [Accepted: 08/06/2021] [Indexed: 11/28/2022]
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In Vitro Antimicrobial and Antibiofilm Activity of S-(-)-Limonene and R-(+)-Limonene against Fish Bacteria. FISHES 2021. [DOI: 10.3390/fishes6030032] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Brazilian fish farming goes together with the emergence of numerous bacterial diseases, with Aeromonas hydrophila being the main bacterial pathogen. As a consequence, antimicrobials are excessively used. Considering that antimicrobials are relatively stable and nonbiodegradable, medicinal plants and their phytochemicals have been used as alternative treatments of bacteriosis in fish farming. Limonene is a monoterpene available in two enantiomers: R-(+)-limonene and S-(-)-limonene. This study analyzed the antibacterial activity of the phytochemicals S-(-)-limonene and R-(+)-limonene against some bacteria isolated from silver catfish (Rhamdia quelen). Furthermore, by means of spectrophotometry and atomic force microscopy, we also investigated the combination therapy of phytochemicals with antimicrobials and their activity in terms of inhibiting biofilm formation. Six clinical isolates and a standard strain were selected for antimicrobial activity testing. Biofilm formation was tested in 96-well plates and nylon cubes. The most sensitive of the strains tested was the A. hydrophila strain (MF 372510). S-(-)-limonene and R-(+)-limonene had high minimum inhibitory concentrations; however, they strongly inhibited A. hydrophila biofilm formation. R-(+)-limonene and S-(-)-limonene had an additive effect when combined with florfenicol and an antagonistic effect with oxytetracycline. In general, the phytochemicals tested showed strong antibiofilm activity against A. hydrophila, and when in combination therapy with florfenicol, they showed an additive effect against the treatment of A. hydrophila.
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40
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Sogodogo E, Doumbo O, Kouriba B, Aboudharam G. Microbial biodiversity of natural toothbrushes in Mali. New Microbes New Infect 2021; 40:100844. [PMID: 33796319 PMCID: PMC7995651 DOI: 10.1016/j.nmni.2021.100844] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Revised: 01/13/2021] [Accepted: 01/20/2021] [Indexed: 11/26/2022] Open
Abstract
Different oral hygiene practices are used to overcome endemic diseases such as dental caries and oral infections. In Mali (Africa), natural plant-based toothbrushes are used for eliminating bacterial biofilm. The repertoire of microorganisms associated with natural toothbrushes is unknown. The aim of our study is to study microbial flora in particular the methanogenic archaea associated with natural toothbrushes recently recognized as responsible for periodontitis and peri-implantitis. We investigated the methanogens and bacteria associated with 15 different natural plant toothbrushes collected in Bamako local market (Mali). Microbiological investigations consisted in culturing the bacteria on agar plates and searching archaea using molecular techniques. No archaea were demonstrated by molecular biology but 50 bacterial species, including 33 aero-anaerobic and 17 aerobic species, were isolated from natural toothbrushes. We isolated Pseudomonas sp., Staphylococcus sp. and Klebsiella pneumoniae, which are acknowledged as opportunistic human pathogens. This study has highlighted the likely impact of the use of natural toothbrushes in the spread of potentially pathogenic bacteria in the human oral cavity.
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Affiliation(s)
- E Sogodogo
- Aix Marseille Université. IRD, MEPHI, IHU-Méditerranée Infection, Marseille, France.,IHU Méditerranée Infection, Marseille, France
| | - O Doumbo
- Department of Epidemiology of Parasitic Diseases, Malaria Research and Training Centre, University of Science, Techniques and Technologies of Bamako, Bamako, Mali
| | - B Kouriba
- Department of Epidemiology of Parasitic Diseases, Malaria Research and Training Centre, University of Science, Techniques and Technologies of Bamako, Bamako, Mali.,Centre d'infectiologie Charles-Mérieux (CICM), Bamako, Mali
| | - G Aboudharam
- Aix Marseille Université. IRD, MEPHI, IHU-Méditerranée Infection, Marseille, France.,Aix-Marseille Université, UFR Odontology, Marseille, France
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Comparison of Autof ms1000 and Bruker Biotyper MALDI-TOF MS Platforms for Routine Identification of Clinical Microorganisms. BIOMED RESEARCH INTERNATIONAL 2021; 2021:6667623. [PMID: 33763483 PMCID: PMC7952152 DOI: 10.1155/2021/6667623] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Revised: 02/01/2021] [Accepted: 02/10/2021] [Indexed: 11/17/2022]
Abstract
Matrix-assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF MS) is widely used in clinical microbiology laboratories because it is cost-effective, reliable, and fast. This study is aimed at comparing the identification performance of the recently developed Autof ms1000 (Autobio, China) with that of the Bruker Biotyper (Bruker Daltonics, Germany). From January to June 2020, 205 preserved strains and 302 clinical isolates were used for comparison. Bacteria were tested with duplicates of the direct transfer method, and formic acid extraction was performed if the results were not at the species level. Fungi were tested with formic acid extraction followed by ethanol extraction methods. 16S rRNA or ITS region sequence analysis was performed on isolates that could not be identified by any of the instruments and on isolates that showed inconsistent results. The time to result of each instrument was also compared. Among preserved strains, species-level identification results were obtained in 202 (98.5%) strains by the Autof ms1000 and 200 (97.6%) strains by the Bruker Biotyper. Correct identification at the species/complex level was obtained for 200 (97.6%) strains by the Autof ms1000 and for 199 (97.1%) strains by the Bruker Biotyper. Among clinical isolates, species-level identification results were obtained in 301 (99.7%) strains and 300 (99.3%) strains by the Autof ms1000 and Bruker Biotyper, respectively. Correct identification at the species/complex level was achieved for 299 (99.0%) strains by the Autof ms1000 and for 300 (99.3%) strains by the Bruker Biotyper. The time to analyze 96 spots was approximately 14 min for the Autof ms1000 and approximately 27 min for the Bruker Biotyper. The two instruments showed comparable performance for the routine identification of clinical microorganisms. In addition, the Autof ms1000 has a short test time, making it convenient for use in clinical microbiology laboratories.
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Gibbon MJ, Couto N, David S, Barden R, Standerwick R, Jagadeesan K, Birkwood H, Dulyayangkul P, Avison MB, Kannan A, Kibbey D, Craft T, Habib S, Thorpe HA, Corander J, Kasprzyk-Hordern B, Feil EJ. A high prevalence of blaOXA-48 in Klebsiella ( Raoultella) ornithinolytica and related species in hospital wastewater in South West England. Microb Genom 2021; 7:mgen000509. [PMID: 33416467 PMCID: PMC8190614 DOI: 10.1099/mgen.0.000509] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Accepted: 12/20/2020] [Indexed: 12/15/2022] Open
Abstract
Klebsiella species occupy a wide range of environmental and animal niches, and occasionally cause opportunistic infections that are resistant to multiple antibiotics. In particular, Klebsiella pneumoniae (Kpne) has gained notoriety as a major nosocomial pathogen, due principally to the rise in non-susceptibility to carbapenems and other beta-lactam antibiotics. Whilst it has been proposed that the urban water cycle facilitates transmission of pathogens between clinical settings and the environment, the level of risk posed by resistant Klebsiella strains in hospital wastewater remains unclear. We used whole genome sequencing (WGS) to compare Klebsiella species in contemporaneous samples of wastewater from an English hospital and influent to the associated wastewater treatment plant (WWTP). As we aimed to characterize representative samples of Klebsiella communities, we did not actively select for antibiotic resistance (other than for ampicillin), nor for specific Klebsiella species. Two species, Kpne and K. (Raoultella) ornithinolytica (Korn), were of equal dominance in the hospital wastewater, and four other Klebsiella species were present in low abundance in this sample. In contrast, despite being the species most closely associated with healthcare settings, Kpne was the dominant species within the WWTP influent. In total, 29 % of all isolates harboured the blaOXA-48 gene on a pOXA-48-like plasmid, and these isolates were almost exclusively recovered from the hospital wastewater. This gene was far more common in Korn (68 % of isolates) than in Kpne (3.4 % of isolates). In general plasmid-borne, but not chromosomal, resistance genes were significantly enriched in the hospital wastewater sample. These data implicate hospital wastewater as an important reservoir for antibiotic-resistant Klebsiella, and point to an unsuspected role of species within the Raoultella group in the maintenance and dissemination of plasmid-borne blaOXA-48. This article contains data hosted by Microreact.
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Affiliation(s)
- Marjorie J. Gibbon
- The Milner Centre for Evolution, Department of Biology and Biochemistry, University of Bath, Bath, UK
| | - Natacha Couto
- The Milner Centre for Evolution, Department of Biology and Biochemistry, University of Bath, Bath, UK
| | - Sophia David
- Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, Cambridge, UK
| | | | | | | | - Hollie Birkwood
- The Milner Centre for Evolution, Department of Biology and Biochemistry, University of Bath, Bath, UK
| | - Punyawee Dulyayangkul
- University of Bristol, School of Cellular and Molecular Medicine, University Walk, Bristol BS8 1TD, UK
| | - Matthew B. Avison
- University of Bristol, School of Cellular and Molecular Medicine, University Walk, Bristol BS8 1TD, UK
| | - Andrew Kannan
- Department of Chemistry, University of Bath, Bath BA2 7AY, UK
| | - Dan Kibbey
- Department of Chemistry, University of Bath, Bath BA2 7AY, UK
| | - Tim Craft
- Department of R&D, Royal United Hospitals Bath, NHS Foundation Trust, Bath BA1 3NG, UK
| | - Samia Habib
- The Milner Centre for Evolution, Department of Biology and Biochemistry, University of Bath, Bath, UK
| | - Harry A. Thorpe
- Department of Biostatistics, University of Oslo, N-0317, Oslo, Norway
| | - Jukka Corander
- Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, Cambridge, UK
- Department of Biostatistics, University of Oslo, N-0317, Oslo, Norway
- Helsinki Institute for Information Technology, Department of Mathematics and Statistics, University of Helsinki, FIN-00014 Helsinki, Finland
| | | | - Edward J. Feil
- The Milner Centre for Evolution, Department of Biology and Biochemistry, University of Bath, Bath, UK
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The Changing Face of the Family Enterobacteriaceae (Order: " Enterobacterales"): New Members, Taxonomic Issues, Geographic Expansion, and New Diseases and Disease Syndromes. Clin Microbiol Rev 2021; 34:34/2/e00174-20. [PMID: 33627443 DOI: 10.1128/cmr.00174-20] [Citation(s) in RCA: 73] [Impact Index Per Article: 24.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
The family Enterobacteriaceae has undergone significant morphogenetic changes in its more than 85-year history, particularly during the past 2 decades (2000 to 2020). The development and introduction of new and novel molecular methods coupled with innovative laboratory techniques have led to many advances. We now know that the global range of enterobacteria is much more expansive than previously recognized, as they play important roles in the environment in vegetative processes and through widespread environmental distribution through insect vectors. In humans, many new species have been described, some associated with specific disease processes. Some established species are now observed in new infectious disease settings and syndromes. The results of molecular taxonomic and phylogenetics studies suggest that the current family Enterobacteriaceae should possibly be divided into seven or more separate families. The logarithmic explosion in the number of enterobacterial species described brings into question the relevancy, need, and mechanisms to potentially identify these taxa. This review covers the progression, transformation, and morphogenesis of the family from the seminal Centers for Disease Control and Prevention publication (J. J. Farmer III, B. R. Davis, F. W. Hickman-Brenner, A. McWhorter, et al., J Clin Microbiol 21:46-76, 1985, https://doi.org/10.1128/JCM.21.1.46-76.1985) to the present.
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Abd El-Ghany WA. A spotlight on Raoultella ornithinolytica: A newly emerging life-threatening zoonotic pathogen. INTERNATIONAL JOURNAL OF ONE HEALTH 2021. [DOI: 10.14202/ijoh.2021.1-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The genus Raoultella contains Raoultella ornithinolytica (R. ornithinolytica), which was previously named as Klebsiella ornithinolytica. R. ornithinolytica is a Gram-negative bacillus that belongs to the family Enterobacteriaceae. This pathogen is normally present in aquaculture, and it has been isolated from fish, insects, and wild and domestic birds. Seafood and poultry products are incriminated as sources of R. ornithinolytica infection. Community-acquired human infection with R. ornithinolytica is common. This infection is commonly associated with sepsis, bacteremia, food poisoning, purities, and urinary and respiratory tracts' infections. Rapid acquired resistance of R. ornithinolytica strains is common, and it is related to the development of resistant genes. R. ornithinolytica is considered as a newly emerging life-threatening pathogen world-wide. Hence, it is very important to determine the role of animals and birds in the epidemiological situation of this pathogen as well as the detection of antibiotic resistance genes before treatment.
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Affiliation(s)
- Wafaa A. Abd El-Ghany
- Department of Poultry Diseases, Faculty of Veterinary Medicine, Cairo University, Egypt
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Motta JC, Ucros E, Rey MR, Gómez PD, Sánchez M. Clinical and microbiological characteristics of patients with Raoultella spp. isolation in Bogotá, Colombia. Med Clin (Barc) 2021; 158:20-23. [PMID: 33558064 DOI: 10.1016/j.medcli.2020.10.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 10/20/2020] [Accepted: 10/21/2020] [Indexed: 11/16/2022]
Abstract
INTRODUCTION Raoultella spp. is a gram-negative bacillus with increasing clinical importance due to the development of multi-drug resistance and because it has been reported as a cause of invasive infection. The risk of infection increases if comorbidities present such as diabetes mellitus and malignancies. METHODS Descriptive study of clinical and microbiological characteristics in adult patients with Raoultella spp. isolation, treated at a fourth-level hospital in Bogotá, Colombia, between 2015 and 2020. RESULTS 61 patients with isolation of Raoultella spp., 51 were considered infection and 10, colonization. The associated comorbidities were hypertension (n=26, 42.6%), heart failure (n=19, 31.1%) and diabetes mellitus (n=18, 29.5%). AmpC resistance patterns were found in 10 samples (16.4%) and KPC in 3 (4.9%). CONCLUSIONS Raoultella spp. is of clinical importance due to its isolation in immunocompromised patients with multiple comorbidities and due to the increase in multi-resistant strains.
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Affiliation(s)
- Juan Camilo Motta
- Especialización en Medicina Interna, Escuela de Medicina y Ciencias de la Salud, Universidad del Rosario, Bogotá, Colombia.
| | - Enrique Ucros
- Servicio de Medicina Interna, Fundación Cardioinfantil, Bogotá, Colombia
| | - Mariana Reyes Rey
- Escuela de Medicina y Ciencias de la Salud, Universidad del Rosario, Bogotá, Colombia
| | - Paula Daniela Gómez
- Escuela de Medicina y Ciencias de la Salud, Universidad del Rosario, Bogotá, Colombia
| | - Magda Sánchez
- Unidad de Microbiología, Fundación Cardioinfantil, Bogotá, Colombia
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Souza PVD, Grecellé CBZ, Barreto F, Ramírez-Castrillon M, Valente P, Costa MD. Bacteria and yeasts associated to Colonial cheese production chain and assessment of their hydrolytic potential. BRAZILIAN JOURNAL OF FOOD TECHNOLOGY 2021. [DOI: 10.1590/1981-6723.28620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Abstract Different types of microorganisms are important in cheese-making because of the contributions their metabolism offers during the process. Few microorganisms present in Colonial cheese are known, in addition to the ones that are introduced to kick-start the processes or the ones that are associated with infections or poisonings. This study aimed to identify, by MALDI-TOF and/or DNA sequencing, the bacteria and yeasts isolated from samples collected in the main stages of Colonial cheese production, i.e., a type of cheese produced in the southern region of Brazil. The lytic capacity of these microorganisms at 5 °C and 30 °C was also evaluated. The 58 bacterial strains were distributed in 10 species among the genera Bacillus, Citrobacter, Klebsiella, Lactococcus, Paenibacillus, Staphylococcus and Raoutella. From the 13 yeasts strains analyzed, three species were identified as following: Candida pararugosa; Meyerozyma guilliermondii; and Rhodotorula mucilaginosa. In three yeasts isolates it was possible to identify only the genus Candida sp. and Trichosporon sp. The species L. lactis (48%) and M. guilliermondii (46%) were, respectively, the predominant bacteria and yeasts species isolated. The highest microbial lytic activity observed was at 30 °C. Lipase activity on isolates was proportionally more observed with yeasts and proteolytic activity with bacteria. Lower caseinase and lipase activity was observed at 5 °C, demonstrating the importance of refrigeration in controlling microbial activity. This research highlighted the cultivation of some microorganisms that are part of the Colonial cheese microbiota as well as that several of them can hydrolyze various compounds present in milk and that could be associated with its maturation or, in uncontrolled circumstances, could be the cause of product deterioration.
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Microorganisms Resistant to Antimicrobials in Wild Canarian Egyptian Vultures ( Neophron percnopterus majorensis). Animals (Basel) 2020; 10:ani10060970. [PMID: 32503222 PMCID: PMC7341323 DOI: 10.3390/ani10060970] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 06/01/2020] [Accepted: 06/02/2020] [Indexed: 12/20/2022] Open
Abstract
Simple Summary Antibiotics are used to prevent and treat bacterial infections in both animals and humans. If bacteria become resistant to them, in particular as the result of the misuse and overuse of antibiotics, the infections that they cause are harder to treat. Therefore, the detection of microorganisms resistant to antimicrobial drugs is an important issue, considering the interaction among domestic animals, human, the ecosystem and wild animals. Wild birds, and particularly birds-of-prey, are sentinels, reservoirs, spreaders and a source of infection for human beings and other animals. Wildlife can also act as an asymptomatic reservoir for zoonotic bacteria (e.g., Salmonella). The presence of antimicrobial-resistant microorganisms was investigated for a period of three years and the differences between chicks in the nest (n = 81) and adult and immature birds (n = 61) were analyzed. Gram negative bacteria were isolated in all the samples. Escherichia coli was obtained in 80.28% of the samples, where the prevalence of Salmonella in our study was 6.3%. The results of our study support the idea that raptors could act as reservoirs of Salmonella and antimicrobial-resistant bacteria, posing a risk not only to wildlife but also to livestock and the human population. Abstract Due to their predatory habits, raptors may serve as indicators of the presence of antimicrobial-resistant bacteria in the environment, but they also represent a public health risk for livestock and humans because they can act as reservoirs, sources and spreaders of these bacteria. Our objective was to determine the presence of antimicrobial-resistant bacteria in cloacal samples of Canarian Egyptian vultures (Neophron percnopterus majorensis), an endemic bird of prey. One hundred and forty-two cloacal swabs were obtained; Escherichia coli was isolated from 80.28% and Salmonella from 6.3% of these samples. Low levels of susceptibility to ampicillin, tetracycline and trimethoprim/sulfamethoxazole were found. About 20% of the isolates were resistant or presented intermediate susceptibility to fluoroquinolones. Surprisingly, we found isolates resistant to imipenem (6.96%). Isolates from chicks were more susceptible to antimicrobial drugs than adult and immature birds. About 50% of E. coli isolates were resistant to ampicillin, tetracycline and trimethoprim/sulfamethoxazole, and about 20% to piperacillin, enrofloxacin and marbofloxacin. High percentages of isolates of Salmonella were found to be resistant to cephalexin (88%) and aminoglycosides (greater than 77%). Our results support the idea that raptors could act as reservoirs of Salmonella and antimicrobial-resistant bacteria, posing a risk not only to wildlife but also to livestock and the human population, thus reinforcing the need to minimize the exposure of wildlife to antimicrobial agent through human and livestock waste.
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