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acinetobacter baumannii bacteremia

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https://www.readbyqxmd.com/read/29122697/early-administration-of-appropriate-antimicrobial-agent-to-improve-the-outcome-of-carbapenem-resistant-acinetobacter-baumannii-complex-bacteremic-pneumonia
#1
Seong Yeon Park, Eun Jung Lee, Tark Kim, Shi Nae Yu, Ki-Ho Park, Mi Suk Lee, Se Yoon Park, Min Hyok Jeon, Tae Hyong Kim, Eun Ju Choo
BACKGROUND: Carbapenem resistant Acinetobacter baumannii complex (CRABC) is an emerging pathogen that causes bloodstream infections and nosocomial pneumonia. This study aimed to describe the severe infection associated with CRABC bacteremic pneumonia and to investigate risk factors for 28-day mortality. METHODS: All patients ≥18 years of age with a CRABC bacteremic pneumonia were enrolled retrospectively at five teaching hospitals in South Korea. Empirical antimicrobial therapy was defined as appropriate if administration of at least one antimicrobial agent, to which the causative pathogen was susceptible, more than 48 hours, within 5 days of the onset of bacteremia...
November 6, 2017: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/28958447/an-outbreak-of-bloodstream-infection-due-to-extensively-resistant-acinetobacter-baumannii-among-neonates
#2
Aysegul Ulu-Kilic, Aycan Gundogdu, Fatma Cevahir, Huseyin Kilic, Tamer Gunes, Emine Alp
BACKGROUND: Extensively resistant Acinetobacter baumannii has emerged and spread worldwide as a significant cause of health care-associated infections and outbreaks. It also causes life-threatening infections among neonates, including bacteremia. The aim of this study was to investigate an outbreak of A baumannii bacteremia (ABB) among neonates. MATERIALS AND METHODS: A retrospective, case-control study was conducted from July 2014 to July 2015 in a neonatal intensive care unit (NICU)...
September 25, 2017: American Journal of Infection Control
https://www.readbyqxmd.com/read/28904355/highly-potent-antimicrobial-modified-peptides-derived-from-the-acinetobacter-baumannii-phage-endolysin-lysab2
#3
Shih-Yi Peng, Ren-In You, Meng-Jiun Lai, Nien-Tsung Lin, Li-Kuang Chen, Kai-Chih Chang
The increase in the prevalence of multidrug-resistant Acinetobacter baumannii (MDRAB) strains is a serious public health concern. Antimicrobial peptides (AMPs) are a possible solution to this problem. In this study, we examined whether AMPs could be derived from phage endolysins. We synthesized four AMPs based on an amphipathic helical region in the C-terminus of endolysin LysAB2 encoded by the A. baumannii phage ΦAB2. These peptides showed potent antibacterial activity against A. baumannii (minimum inhibitory concentration, 4-64 μM), including some MDR and colistin-resistant A...
September 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28894700/targeting-the-type-ii-secretion-system-development-optimization-and-validation-of-a-high-throughput-screen-for-the-identification-of-small-molecule-inhibitors
#4
Ursula Waack, Tanya L Johnson, Khalil Chedid, Chuanwu Xi, Lyle A Simmons, Harry L T Mobley, Maria Sandkvist
Nosocomial pathogens that develop multidrug resistance present an increasing problem for healthcare facilities. Due to its rapid rise in antibiotic resistance, Acinetobacter baumannii is one of the most concerning gram-negative species. A. baumannii typically infects immune compromised individuals resulting in a variety of outcomes, including pneumonia and bacteremia. Using a murine model for bacteremia, we have previously shown that the type II secretion system (T2SS) contributes to in vivo fitness of A. baumannii...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28879405/infection-control-interventions-affected-by-resource-shortages-impact-on-the-incidence-of-bacteremias-caused-by-carbapenem-resistant-pathogens
#5
E Kousouli, O Zarkotou, L Politi, K Polimeri, G Vrioni, K Themeli-Digalaki, A Tsakris, S Pournaras
We evaluated an infection control (IC) program influenced by personnel and material resource shortages on the incidence of bloodstream infections (BSI) due to carbapenem-resistant Klebsiella pneumoniae (CRKP), Acinetobacter baumannii (CRAB), and Pseudomonas aeruginosa (CRPA) in an endemic region. Between January 2010 and December 2015, all BSI episodes caused by CRKP, CRAB, and CRPA were recorded. An IC bundle was implemented in January 2012. We evaluated the effect of the interventions on BSI rates between the pre-intervention (2010-2011) and intervention (2012-2013) periods, using an interrupted time-series model...
September 6, 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/28877134/the-use-of-intravenous-and-inhaled-colistin-therapy-during-a-burn-center-outbreak-of-multidrug-resistant-acinetobacter-baumannii
#6
Tomas J Saun, Alan D Rogers, Jerome A Leis, Robert Cartotto
The authors report on the use of combination intravenous and inhaled colistin therapy in 2 patients with major burns admitted to an American Burn Association-verified burn center during a multidrug-resistant (MDR) Acinetobacter baumannii outbreak. Both patients had documented, culture-proven MDR Acinetobacter ventilator-associated pneumonia and bacteremia leading to sepsis. Both patients were successfully extubated and subsequently discharged from hospital. In this article, the authors provide the timeline of events and treatments that were used in these 2 cases...
August 31, 2017: Journal of Burn Care & Research: Official Publication of the American Burn Association
https://www.readbyqxmd.com/read/28868304/treatment-of-sepsis-what-is-the-antibiotic-choice-in-bacteremia-due-to-carbapenem-resistant-enterobacteriaceae
#7
REVIEW
Fatema Alhashem, Nicolette Leonie Tiren-Verbeet, Emine Alp, Mehmet Doganay
Sepsis is one of the major challenges of today. Although gram-positive bacteria related infections are more prevalent in hospital setting, the highest mortality rate is associated with gram-negative microorganisms especially Enterobacteriaceae. Enterobacteriaceae, including Escherichia coli, Klebsiella spp., Proteus spp., Enterobacter spp. and Serratia spp. Resistance to β-lactams in Enterobacteriaceae is primarily attributed to the production of B-lactamase enzymes with subsequent antibiotic hydrolysis and to a lesser extent by alteration of efflux pump or porins expression...
August 16, 2017: World Journal of Clinical Cases
https://www.readbyqxmd.com/read/28855313/complexity-of-complement-resistance-factors-expressed-by-acinetobacter-baumannii-needed-for-survival-in-human-serum
#8
Amaro F Sanchez-Larrayoz, Noha M Elhosseiny, Marc G Chevrette, Yang Fu, Peter Giunta, Raúl G Spallanzani, Keerthikka Ravi, Gerald B Pier, Stephen Lory, Tomás Maira-Litrán
Acinetobacter baumannii is a bacterial pathogen with increasing impact in healthcare settings, due in part to this organism's resistance to many antimicrobial agents, with pneumonia and bacteremia as the most common manifestations of disease. A significant proportion of clinically relevant A. baumannii strains are resistant to killing by normal human serum (NHS), an observation supported in this study by showing that 12 out of 15 genetically diverse strains of A. baumannii are resistant to NHS killing. To expand our understanding of the genetic basis of A...
October 15, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28830746/risk-factors-and-molecular-epidemiology-of-acinetobacter-baumannii-bacteremia-in-neonates
#9
Hao-Yuan Lee, Shih-Yun Hsu, Jen-Fu Hsu, Chyi-Liang Chen, Yi-Hsin Wang, Cheng-Hsun Chiu
BACKGROUND: Acinetobacter baumannii infections in neonates are not uncommon but rarely studied. METHODS: Clinical and molecular epidemiology of 40 patients with A. baumannii bacteremia in the neonatal intensive care units (NICUs) of a medical center from 2004 to 2014 was analyzed. RESULTS: Multi-drug resistance was found in only 3 isolates (7.5%). Sequence types (STs) of A. baumannii defined by multilocus sequencing typing were diverse, and 72...
August 8, 2017: Journal of Microbiology, Immunology, and Infection, Wei Mian Yu Gan Ran za Zhi
https://www.readbyqxmd.com/read/28705768/the-clinical-and-microbiological-characteristics-of-infections-in-burn-patients-from-the-formosa-fun-coast-dust-explosion
#10
Tzu-Chao Lin, Rui-Xin Wu, Chih-Chien Chiu, Ya-Sung Yang, Yi Lee, Jung-Chung Lin, Feng-Yee Chang
BACKGROUND/PURPOSE: Bloodstream infection is a leading cause of mortality among burn patients. This study aimed to evaluate the risk factors, causative pathogens, and the relationship between bloodstream infections and other infections among burn patients from the Formosa Fun Coast Dust Explosion. METHODS: This retrospective study evaluated the demographic and clinical characteristics, infection types, causative pathogen(s), and isolates' antibiotic susceptibilities from patients who were hospitalized between June 27 and September 31, 2015...
June 22, 2017: Journal of Microbiology, Immunology, and Infection, Wei Mian Yu Gan Ran za Zhi
https://www.readbyqxmd.com/read/28701266/community-acquired-bloodstream-infections-caused-by-acinetobacter-baumannii-a%C3%A2-matched-case-control-study
#11
Chung-Ting Chen, Yung-Chih Wang, Shu-Chen Kuo, Fang-Huy Shih, Te-Li Chen, Chorng-Kuang How, Ya-Sung Yang, Yi-Tzu Lee
BACKGROUND: Acinetobacter baumannii is an important nosocomial pathogen worldwide. Its role in community-acquired infection remains controversial and has rarely been reported. METHODS: Patients with monobacterial bloodstream infections caused by genomic species identified A. baumannii, admitted to Taipei Veterans General Hospital between 1999 and 2010, were selected as cases. Controls were defined as patients acquiring infection in a healthcare setting and were matched for age and sex...
June 29, 2017: Journal of Microbiology, Immunology, and Infection, Wei Mian Yu Gan Ran za Zhi
https://www.readbyqxmd.com/read/28686744/should-we-treat-patients-with-only-one-set-of-positive-blood-cultures-for-extensively-drug-resistant-acinetobacter-baumannii-the-same-as-multiple-sets
#12
MULTICENTER STUDY
Aristine Cheng, Yu-Chung Chuang, Hsin-Yun Sun, Chia-Jui Yang, Hou-Tai Chang, Jia-Ling Yang, Wang-Huei Sheng, Yee-Chun Chen, Shan-Chwen Chang
Acinetobacter species are not considered skin commensals and under-treatment is an overriding concern when caring for critically-ill patients who are mostly at risk of extensively drug-resistant Acinetobacter baumannii (XDRAB) infections. Hence even a single blood culture yielding XDRAB will tend to prompt intervention. However, field observations suggest that patients with single-positive blood cultures had milder disease and were more likely to be recruited in interventional studies than those with multiple-positive blood cultures, yet no distinction is made in current clinical or trial recruitment practices...
2017: PloS One
https://www.readbyqxmd.com/read/28669800/sensitivity-and-specificity-of-matrix-associated-laser-desorption-ionization-time-of-flight-mass-spectrometry-maldi-tof-ms-in-discrimination-at-species-level-for-acinetobacter-bacteremia
#13
Meng-San Wu, Sophie Collier, Po-Yu Liu, Yi-Tzu Lee, Shu-Chen Kuo, Ya-Sung Yang, Te-Li Chen, Zi-Yuan Shi, Chin-Fu Lin
We aimed to establish the role of MALDI-TOF MS on species discrimination of phenotypically indistinguishable A. baumannii, A. pittii and A. nosocomialis. Compared to multiplex PCR, the gold standard, MALDI-TOF MS yielded a high sensitivity for A. baumannii (97.9%) and specificity for A. pittii (98.9%) and A. nosocomialis (100%).
June 29, 2017: Journal of Microbiological Methods
https://www.readbyqxmd.com/read/28664267/transdermally-administered-proline-arginine-rich-host-defense-peptides-show-systemic-efficacy-in-a-lethal-mouse-bacteremia-model
#14
Eszter Ostorhazi, Andrea Horvath, Dora Szabo, Laszlo Otvos
Host defense peptides are preferably administered as topical therapeutic agents. We have investigated whether peptide A3-APO can enter the circulation when applied to the ear skin. Efficacy of peptide monotherapy as transdermal administration option was assessed in a systemic mouse Acinetobacter baumannii model. A3-APO reduced mortality and demonstrated a statistically significant reduction of blood bacterial counts, regardless whether it was administered prior or after bacterial challenge. The peptidic metabolite of A3-APO was efficacious when applied to the ear or tail...
June 29, 2017: Amino Acids
https://www.readbyqxmd.com/read/28650701/prevalence-of-acinetobacter-baumannii-strains-expressing-the-type-6-secretion-system-in-patients-with-bacteremia
#15
Guillermo D Repizo
No abstract text is available yet for this article.
June 26, 2017: Virulence
https://www.readbyqxmd.com/read/28572073/tigecycline-treatment-in-an-infant-with-extensively-drug-resistant-acinetobacter-baumannii-bacteremia
#16
Jiawei Zeng, Lidan Zhang, Min Gao, Jingjing Wu, Haiyan Wu, Jie Chen, Xiao Chen, Wen Tang
The successful use of tigecycline in a 12-month old liver transplant recipient with extensively drug-resistant Acinetobacter baumannii bacteremia is presented. Tigecycline serum concentrations were monitored to help improve antibiotic efficacy and minimize side effects. A literature review identified 11 additional pediatric cases of A. baumannii infection treated with tigecycline since 2011. Tigecycline treatment should be considered in children with extensively drug-resistant bacterial infections.
May 29, 2017: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/28523249/risk-factors-clinical-presentation-and-outcome-of-acinetobacter-baumannii-bacteremia
#17
Tala Ballouz, Jad Aridi, Claude Afif, Jihad Irani, Chantal Lakis, Rakan Nasreddine, Eid Azar
Infections caused by Acinetobacter baumannii (AB), an increasingly prevalent nosocomial pathogen, have been associated with high morbidity and mortality. We conducted this study to analyze the clinical features, outcomes, and factors influencing the survival of patients with AB bacteremia. We retrospectively examined the medical records of all patients developing AB bacteremia during their hospital stay at a tertiary care hospital in Beirut between 2010 and 2015. Ninety episodes of AB bacteremia were documented in eighty-five patients...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28453834/overproduction-of-outer-membrane-protein-a-by-acinetobacter-baumannii-as-a-risk-factor-for-nosocomial-pneumonia-bacteremia-and-mortality-rate-increase
#18
MULTICENTER STUDY
Viviana Sánchez-Encinales, Rocío Álvarez-Marín, María Eugenia Pachón-Ibáñez, Felipe Fernández-Cuenca, Alvaro Pascual, José Garnacho-Montero, Luis Martínez-Martínez, Jordi Vila, María Mar Tomás, José Miguel Cisneros, Germán Bou, Jesús Rodríguez-Baño, Jerónimo Pachón, Younes Smani
Background: Outer membrane protein A (OmpA) is a porin involved in Acinetobacter baumannii pathogenesis. However, OmpA clinical implication in hospital-acquired infections remains unknown. We aimed to determine whether OmpA overproduction was a risk factor associated with pneumonia, bacteremia, and mortality. Methods: We analyzed demographic, microbiological, and clinical data from 100 patients included in a unicenter cohort and 246 included in a unicenter cohort and a multicenter cohort...
March 15, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28448786/microbiological-features-and-clinical-impact-of-the-type-vi-secretion-system-t6ss-in-acinetobacter-baumannii-isolates-causing-bacteremia
#19
Jungok Kim, Ji-Young Lee, Haejeong Lee, Ji Young Choi, Dae Hun Kim, Yu Mi Wi, Kyong Ran Peck, Kwan Soo Ko
We investigated the genetic background and microbiological features of T6SS-positive Acinetobacter baumannii isolates and clinical impact of the T6SS in patients with A. baumannii bacteremia. One hundred and 62 A. baumannii isolates from patients with bacteremia in 2 tertiary-care hospitals in Korea were included in this study. Approximately one-third (51/162, 31.5%) of the A. baumannii clinical isolates possessed the hcp gene, and the hcp-positive isolates were found in several genotypes in multilocus sequence typing...
April 27, 2017: Virulence
https://www.readbyqxmd.com/read/28446911/the-immune-response-against-acinetobacter-baumannii-an-emerging-pathogen-in-nosocomial-infections
#20
REVIEW
María Guadalupe García-Patiño, Rodolfo García-Contreras, Paula Licona-Limón
Acinetobacter baumannii is the etiologic agent of a wide range of nosocomial infections, including pneumonia, bacteremia, and skin infections. Over the last 45 years, an alarming increase in the antibiotic resistance of this opportunistic microorganism has been reported, a situation that hinders effective treatments. In order to develop effective therapies against A. baumannii it is crucial to understand the basis of host-bacterium interactions, especially those concerning the immune response of the host...
2017: Frontiers in Immunology
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