Article
Infectious Diseases
Pedro Maria Martinez Perez-Crespo, Alvaro Rojas, Joaquin Felipe Lanz-Garcia, Pilar Retamar-Gentil, Jose Maria Reguera-Iglesias, Olalla Lima-Rodriguez, Alfonso del Arco Jimenez, Jonathan Fernandez Suarez, Alfredo Jover-Saenz, Josune Goikoetxea Aguirre, Eva Leon Jimenez, Maria Luisa Canton-Bulnes, Pilar Ortega Lafont, Carlos Arminanzas Castillo, Juan Sevilla Blanco, Jordi Cuquet Pedragosa, Lucia Boix-Palop, Berta Becerril Carral, Alberto Bahamonde-Carrasco, Teresa Marrodan Ciordia, Clara Natera Kindelan, Isabel Maria Reche Molina, Carmen Herrero Rodriguez, Ines Perez Camacho, David Vinuesa Garcia, Fatima Galan-Sanchez, Alejandro Smithson Amat, Esperanza Merino de Lucas, Antonio Sanchez-Porto, Marcos Guzman Garcia, Inmaculada Lopez-Hernandez, Jesus Rodriguez-Bano, Luis Eduardo Lopez-Cortes
Summary: This study aimed to describe the characteristics of patients with community-onset bloodstream infections (CO-BSI) caused by Pseudomonas aeruginosa, identify predictors, and develop a predictive score. The study found that male gender, hematological malignancy, obstructive uropathy, source of infection other than urinary tract, biliary tract or intra-abdominal, and healthcare-associated BSI are independent predictors of Pseudomonas aeruginosa CO-BSI. The developed predictive score showed a negative predictive value of 89%.
Article
Infectious Diseases
Keith Teelucksingh, Eric Shaw
Summary: This retrospective study examined the clinical characteristics and treatment outcomes of patients with Pseudomonas aeruginosa bacteremia (PAB) in several community hospitals in the USA. Results showed that a high proportion of patients received timely, active antimicrobial therapy for PAB, and the timing of therapy did not significantly impact patient outcomes.
EUROPEAN JOURNAL OF CLINICAL MICROBIOLOGY & INFECTIOUS DISEASES
(2022)
Article
Infectious Diseases
Petros Ioannou, Konstantinos Alexakis, Sofia Maraki, Diamantis P. Kofteridis
Summary: This study aimed to assess the epidemiological and microbiological characteristics of patients with bloodstream infection (BSI) caused by Pseudomonas spp. in a tertiary hospital. It found that Pseudomonas aeruginosa was the third most commonly identified cause among gram-negative microorganisms causing BSI, with a high mortality rate. The study also identified factors associated with mortality and observed changes in antimicrobial resistance patterns after the onset of the COVID-19 pandemic.
Article
Infectious Diseases
Kevin B. Laupland, David L. Paterson, Adam G. Stewart, Felicity Edwards, Patrick N. A. Harris
Summary: This study describes the epidemiology and outcome of Sphingomonas species bloodstream infections (BSI) in an Australian population. The findings suggest that this infection primarily occurs in the community and is associated with a significant risk of death.
INTERNATIONAL JOURNAL OF INFECTIOUS DISEASES
(2022)
Article
Infectious Diseases
Anne-Sophie Valentin, Sandra Dos Santos, Florent Goube, Remi Gimenes, Marie Decalonne, Laurent Mereghetti, Come Daniau, Nathalie van der Mee-Marquet
Summary: The study evaluated the incidence of sink contamination by MDR bacteria and its association with clinical infections in intensive care units. It found that sink contamination and splashing are common and multifactorial infectious risks.
CLINICAL MICROBIOLOGY AND INFECTION
(2021)
Article
Biochemistry & Molecular Biology
Tomasz Bogiel, Dagmara Depka, Mateusz Rzepka, Agnieszka Mikucka
Summary: This study assessed the susceptibility and virulence factor gene frequency of clinical P. aeruginosa strains causing bloodstream infections. The results showed that these strains were resistant to multiple antibiotics and had diverse compositions of virulence factor genes.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Microbiology
Cristina Royo-Cebrecos, Julia Laporte-Amargos, Marta Pena, Isabel Ruiz-Camps, Pedro Puerta-Alcalde, Edson Abdala, Chiara Oltolini, Murat Akova, Miguel Montejo, Malgorzata Mikulska, Pilar Martin-Davila, Fabian Herrera, Oriol Gasch, Lubos Drgona, Hugo Manuel Paz Morales, Anne-Sophie Brunel, Estefania Garcia, Burcu Isler, Winfried Kern, Zaira R. Palacios-Baena, Guillermo Maestro de la Calle, Maria Milagro Montero, Souha S. Kanj, Oguz R. Sipahi, Sebnem Calik, Ignacio Marquez-Gomez, Jorge Marin, Marisa Z. R. Gomes, Philipp Hemmatti, Rafael Araos, Maddalena Peghin, Jose Luis del Pozo, Lucrecia Yanez, Robert Tilley, Adriana Manzur, Andres Novo, Jordi Carratala, Carlota Gudiol
Summary: This study assessed the clinical features and outcomes of Pseudomonas aeruginosa bloodstream infection (PA BSI) in neutropenic patients with hematological malignancies (HM) and solid tumors (ST). The study found differences in the clinical characteristics and outcomes between hematologic patients and patients with solid tumors. Hematologic patients had more profound neutropenia and a higher risk MASCC index score, while patients with solid tumors were more likely to develop septic shock and had higher mortality rates. Hematologic patients also had more frequent multidrug-resistant P. aeruginosa infections and were more likely to receive inadequate initial antibiotic therapy. Therapy with granulocyte colony-stimulating factor was associated with improved survival in both groups.
Article
Microbiology
Amalia Papanikolopoulou, Panagiotis Gargalianos-Kakolyris, Athina Stoupis, Nikos Moussas, Anastasia Pangalis, Kalliopi Theodoridou, Genovefa Chronopoulou, Nikos Pantazis, Maria Kantzanou, Helena C. Maltezou, Athanasios Tsakris
Summary: This study investigated the association between the incidence of CRPA bacteremia, antibiotic consumption, and infection control measures in a hospital from 2013 to 2018. The findings showed a significant decrease in the consumption of certain antibiotics and a decrease in the incidence of CRPA in most clinics and departments. Increased isolation rates of MDR carrier patients were correlated with a decreased incidence of CRPA bacteremia in the adults ICU. Interestingly, an increase in the use of hand-hygiene solutions was associated with a decrease in antibiotic consumption. In conclusion, multimodal infection control interventions resulted in a significant reduction of CRPA bacteremia.
Article
Immunology
Sisi Zhen, Yuanqi Zhao, Zhangjie Chen, Tingting Zhang, Jieru Wang, Erlie Jiang, Fengkui Zhang, Yingchang Mi, Xiaofan Zhu, Mingzhe Han, Zhijian Xiao, Jianxiang Wang, Sizhou Feng
Summary: This study aimed to investigate the clinical outcomes of carbapenem-resistant Pseudomonas aeruginosa (CRPA) bacteremia and identify risk factors, as well as compare the efficacy of traditional and novel antibiotic regimens. The results showed that the 30-day mortality rate for CRPA bacteremia in hematological patients was 21.0%. Neutropenia >7 days after bloodstream infections, higher Pitt bacteremia score, higher Charlson comorbidity index, and bacteremia due to multidrug-resistant Pseudomonas aeruginosa were identified as independent risk factors of 30-day mortality. Furthermore, Ceftazidime-avibactam-based regimens were found to be associated with lower mortality in CRPA and multidrug-resistant Pseudomonas aeruginosa bacteremia.
FRONTIERS IN CELLULAR AND INFECTION MICROBIOLOGY
(2023)
Article
Medicine, General & Internal
Deniz Akyol, Mustafa Karatas, Sohret Aydemir, Serhat Uysal, Husnu Pullukcu, Meltem Tasbakan, Alper Tunger, Bilgin Arda, Feriha Cilli, Ajda Turhan, Hilal Sipahi, Tansu Yamazhan, Sercan Ulusoy, Oguz Resat Sipahi
Summary: This study aimed to evaluate the resistance patterns and incidence of nosocomial bacteremia caused by Pseudomonas aeruginosa. The results showed a decrease in resistance to meropenem and amikacin, but an increase in ciprofloxacin and cefepime resistance rates in the subgroup of carbapenem-resistant strains. The study highlights the need for infection control and antimicrobial stewardship efforts to decrease antibacterial resistance rates and incidence.
ACTA MEDICA MEDITERRANEA
(2022)
Article
Microbiology
Alba Bergas, Adaia Albasanz-Puig, Ana Fernandez-Cruz, Marina Machado, Andres Novo, David van Duin, Carolina Garcia-Vidal, Morgan Hakki, Isabel Ruiz-Camps, Jose Luis del Pozo, Chiara Oltolini, Catherine DeVoe, Lubos Drgona, Oriol Gasch, Malgorzata Mikulska, Pilar Martin-Davila, Maddalena Peghin, Lourdes Vazquez, Julia Laporte-Amargos, Xavier Dura-Miralles, Natalia Pallares, Eva Gonzalez-Barca, Ana Alvarez-Uria, Pedro Puerta-Alcalde, Juan Aguilar-Company, Francisco Carmona-Torre, Teresa Daniela Clerici, Sarah B. Doernberg, Lucia Petrikova, Silvia Capilla, Laura Magnasco, Jesus Fortun, Nadia Castaldo, Jordi Carratala, Carlota Gudiol
Summary: This study assessed the characteristics and outcomes of neutropenic hematologic patients with Pseudomonas aeruginosa bloodstream infection treated with ceftolozane-tazobactam (C/T). The results showed that treatment with C/T was associated with less need for mechanical ventilation and reduced 7-day and 30-day mortality rates in these patients.
MICROBIOLOGY SPECTRUM
(2022)
Article
Respiratory System
Christian Ronn, Peter Kamstrup, Josefin Eklof, Louise Lindhardt Toennesen, Jonas Bredtoft Boel, Christian Ostergaard Andersen, Ram Benny Dessau, Jon Torgny Wilcke, Pradeesh Sivapalan, Charlotte Suppli Ulrik, Jens-Ulrik Staehr Jensen
Summary: This observational cohort study found that a lower respiratory tract culture positive for S. maltophilia in COPD patients was associated with significantly increased mortality and hospitalisation for exacerbation of COPD. Randomised controlled trials are suggested to explore the potential of antibiotic treatment targeting S. maltophilia.
RESPIRATORY RESEARCH
(2023)
Article
Biotechnology & Applied Microbiology
James Redfern, Janine Wallace, Alex van Belkum, Magali Jaillard, Elliot Whittard, Roobinidevi Ragupathy, Joanna Verran, Peter Kelly, Mark Charles Enright
Summary: Pseudomonas aeruginosa is a common environmental microorganism that can form biofilms on indwelling device surfaces, promoting adhesion and survival. Research identified accessory genes and core-genome SNPs associated with enhanced biofilm production at 22 degrees C, including a 165 kb genomic island with heavy metal resistance genes.
Article
Immunology
Kelly Kweng, Andrea Benedetti, Yvonne Yau, Valerie Waters, Dao Nguyen
Summary: This study found that PA isolates from new-onset CF infections exhibit strain-specific susceptibility to neutrophil antibacterial functions, and PA isolates resistant to neutrophil phagocytosis are independent risk factors for failed tobramycin eradication. Experimental results on neutrophil phagocytosis and intracellular killing showed that isolates from persistent infections were more resistant compared to those from eradicated infections.
JOURNAL OF INFECTIOUS DISEASES
(2022)
Article
Infectious Diseases
Aysegul Copur Cicek, Ayse Erturk, Nebahat Ejder, Erva Rakici, Ugur Kostakoglu, Ilknur Esen Yildiz, Songul Ozyurt, Emine Sonmez
Summary: Researching carbapenem-resistant isolates revealed a high prevalence of bacteria carrying beta-lactamase and metallo-beta-lactamase genes, with more resistance genes and coexistence found in hospital-acquired samples. There was no difference between community and hospital-associated isolates in PFGE results, but a significant difference was observed in terms of fatality rates, indicating the importance of other microorganisms coexisting with resistance genes in patient outcomes.
INFECTION AND DRUG RESISTANCE
(2021)
Article
Infectious Diseases
Si-Ho Kim, Cheon-Hoo Jeon, Hyoung-Tae Kim, Yu Mi Wi
Summary: This study investigated the clinical characteristics of patients with hypermucoviscous Klebsiella pneumoniae (hmvKp) bacteremia from non-hepatobiliary tract infection. The results showed that hmvKp was associated with less frequent drug resistance and metastatic-purulent presentation, but not with clinical outcomes.
Article
Surgery
Jinyoung Yang, Kyo Won Lee, Jin Yang Baek, Seongman Bae, Young Ho Lee, Haein Kim, Kyungmin Huh, Sun Young Cho, Cheol-In Kang, Doo Ryeon Chung, Kyong Ran Peck, Jae Berm Park, Sung -Han Kim, Tae -Jong Kim, Dong-Min Kim, Jae-Hoon Ko
Summary: Diminished immune response to COVID-19 vaccines is a concern for solid organ transplant recipients. A study investigated the immune responses of kidney transplant recipients after a third vaccine dose and breakthrough infection. The study found that the antibody titers and cellular immune responses were enhanced in recipients who experienced breakthrough infection.
AMERICAN JOURNAL OF TRANSPLANTATION
(2023)
Retraction
Microbiology
So Yeon Kim, Ji-Young Rhee, Kwan Soo Ko
ANTIMICROBIAL AGENTS AND CHEMOTHERAPY
(2023)
Retraction
Microbiology
Juyoun Shin, Jin Yang Baek, Sun Young Cho, Hee Jae Huh, Nam Yong Lee, Jae-Hoon Song, Doo Ryeon Chung, Kwan Soo Ko
ANTIMICROBIAL AGENTS AND CHEMOTHERAPY
(2023)
Article
Microbiology
Hyeri Seok, Ji-Young Choi, Michidmaral Ganbold, Jong Hyun Shin, Jooyun Kim, Won Suk Choi, Dae Won Park, Kwan Soo Ko
Summary: Recently, there has been an increase in the number of reported infections caused by non-diphtheriae Corynebacterium spp. in patients, as well as the discovery of novel species of Corynebacterium isolated from humans. We report two cases of human infections caused by Corynebacterium haemomassiliense-like organisms, which were initially unidentified by MALDI-TOF MS analysis. Further analysis using three housekeeping genes and phenotypic features revealed their close relation to the recently described species C. haemomassiliense. These strains were found to be multidrug-resistant but susceptible to vancomycin, meropenem, and linezolid. Our report suggests that these recently described Corynebacterium species may not be limited to a specific region, highlighting the difficulty in classifying the genus Corynebacterium.
CURRENT MICROBIOLOGY
(2023)
Article
Infectious Diseases
Jeongwoo Jo, Wonbeom Park, Dae-Hyuk Kweon, Kwan Soo Ko
Summary: Tigecycline heteroresistance is highly prevalent in Acinetobacter baumannii clinical isolates, reducing the efficacy of tigecycline treatment. This study confirmed the reproducibility and stability of mimicked tigecycline heteroresistance and found that the development of resistance in tigecycline-heteroresistant A. baumannii strains may depend on the selection of a pre-existing resistant subpopulation.
INTERNATIONAL JOURNAL OF ANTIMICROBIAL AGENTS
(2023)
Article
Immunology
June -Young Koh, Jae-Hoon Ko, So Yun Lim, Seongman Bae, Kyungmin Huh, Sun Young Cho, Cheol-In Kang, Doo Ryeon Chung, Chi Ryang Chung, Sung -Han Kim, Kyong Ran Peck, Jeong Seok Lee
Summary: Triple immune modulator therapy in severe COVID-19 improves 30-day recovery by suppressing inflammation and regulating abnormal immune response.
CLINICAL IMMUNOLOGY
(2023)
Article
Microbiology
Sun Ju Kim, Jeongwoo Jo, Kwan Soo Ko
Summary: This study found that colistin resistance in K. variicola was mediated by the modification of lipid A. Although the isolate was obtained from faecal samples of healthy adults, colistin-resistant K. variicola challenges public health as an opportunistic pathogen.
JOURNAL OF MEDICAL MICROBIOLOGY
(2023)
Article
Infectious Diseases
Jin Yeong Hong, Cheol-In Kang, Jinyoung Yang, Jae-Hoon Ko, Kyungmin Huh, Sun Young Cho, Doo Ryeon Chung, Chul Won Jung, Kyong Ran Peck
Summary: Posaconazole delayed-release tablet prophylaxis is commonly used to prevent invasive fungal infection in acute myeloid leukemia patients undergoing chemotherapy. This study investigated breakthrough fungal infections in patients receiving posaconazole tablet prophylaxis, identifying risk factors and examining posaconazole profiles. Among the screened patients, breakthrough fungal infections occurred in 10 cases, leading to higher in-hospital mortality compared to non-infected patients. Risk factors for breakthrough fungal infection included prior hematopoietic stem cell transplantation, prolonged neutropenia, and low plasma posaconazole concentration. Therapeutic drug monitoring may be necessary for patients receiving posaconazole tablets.
Article
Immunology
Linda Shin, Jong Rim Choi, Kyungmin Huh, Doo Ryeon Chung, Sun Young Cho, Jongsuk Jeong, Jae-Hoon Ko, Cheol-In Kang, Kyong Ran Peck
Summary: The study aimed to assess the seroprevalence of measles and varicella zoster virus (VZV) among healthcare workers (HCW) and evaluate the concordance between self-reported history of previous disease or vaccination and seropositivity. A total of 10,278 HCWs underwent serologic tests for measles and 9,607 for VZV from 2017 to 2022. The overall seropositivity rates for measles and VZV were 78.1% and 92.8% respectively. Measles seropositivity declined gradually in HCWs born after 1985, while VZV seropositivity remained high in all birth cohorts. The self-reported vaccination history was not reliable for screening HCWs, with low negative predictive values.
Article
Infectious Diseases
Si -Ho Kim, Kyungmin Huh, Kyo Won Lee, Jae Berm Park, Woo Seong Huh, Jae-Hoon Ko, Sun Young Cho, Cheol-In Kang, Doo Ryeon Chung, Kyong Ran Peck
Summary: This study found that vaccinating kidney transplant recipients against herpes zoster before transplantation effectively prevents the disease and has a significant protective effect. Patients who were not vaccinated had a higher risk of developing herpes zoster.
CLINICAL MICROBIOLOGY AND INFECTION
(2023)
Article
Infectious Diseases
Kyungmin Huh, Doo Ryeon Chung, Young Eun Ha, Jae-Hoon Ko, Hee Jae Huh, Nam Yong Lee, Sun Young Cho, Cheol-In Kang, Kyong Ran Peck, Jae-Hoon Song
Summary: This study aims to explore the reasons for the poor prognosis of patients with severe vancomycin-resistant enterococci (VRE) infection, whether it is due to vancomycin resistance or the predominance of Enterococcus faecium (Efm) among VRE. The study found that vancomycin resistance was independently associated with increased risk of mortality.
INTERNATIONAL JOURNAL OF INFECTIOUS DISEASES
(2023)
Article
Infectious Diseases
Jeongwoo Jo, Ji Young Lee, Hongbaek Cho, Kwan Soo Ko
Summary: Recent studies have found that colistin dependence frequently occurs in colistin-susceptible Acinetobacter baumannii isolates. Although the parental strains are resistant, colistin-dependent mutants showed increased susceptibility to other antibiotics, suggesting the possibility of developing strategies to eliminate multidrug-resistant A. baumannii. Combination treatments of colistin with subinhibitory concentrations of other antibiotics, especially amikacin, inhibited the development of colistin dependence and eradicated the strains in in vitro assays.
MICROBIAL DRUG RESISTANCE
(2023)
Article
Medicine, General & Internal
Si -Ho Kim, Yu Mi Wi, Kyong Ran Peck
Summary: This study examined the clinical outcome of carbapenem-resistant Acinetobacter baumannii bacteremia and assessed the effectiveness of tetracyclines-based therapy. Among the 108 patients included in the study, the overall 30-day mortality rate was 71.4%. The Pitt's bacteremia score, colistin-single regimens, and tetracyclines single/tetracyclines-colistin combination regimens were found to be independently associated with 30-day mortality. The combination of tetracyclines and colistin showed a higher survival rate compared to tetracycline or colistin alone.
JOURNAL OF KOREAN MEDICAL SCIENCE
(2023)
Article
Medicine, General & Internal
Yu Mi Wi, Ki Tae Kwon, Soyoon Hwang, Sohyun Bae, Yoonjung Kim, Hyun-Ha Chang, Shin -Woo Kim, Hae Suk Cheong, Shinwon Lee, Dong Sik Jung, Kyung Mok Sohn, Chisook Moon, Sang Taek Heo, Bongyoung Kim, Mi Suk Lee, Jian Hur, Jieun Kim, Young Kyung Yoon, Korean Society Antimicrobial Therapy
Summary: This study investigated the prescription patterns of antibiotics for patients with chronic or acute illnesses nearing end-of-life in South Korea. The findings revealed a high rate of inappropriate antibiotic prescribing, highlighting the need for consultation with infectious disease specialists and the implementation of antimicrobial stewardship programs to optimize antibiotic use.
JOURNAL OF KOREAN MEDICAL SCIENCE
(2023)