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https://www.readbyqxmd.com/read/29164140/phenotypic-and-genotypic-features-of-a-salmonella-heidelberg-strain-isolated-in-broilers-in-brazil-and-their-possible-association-to-antibiotics-and-short-chain-organic-acids-resistance-and-susceptibility
#1
Elizabeth Santin, Ricardo Mitsuo Hayashi, Jessica Caroline Wammes, Ricardo Gonzalez-Esquerra, Marcelo Falsarella Carazzolle, Caio César de Melo Freire, Paulo Sérgio Monzani, Anderson Ferreira da Cunha
Salmonella enterica serovar Heidelberg is a human pathogen also found in broilers. A strain (UFPR1) has been associated with field reports of resistance to short-chain organic acids (SCOA) in broilers in the South of Brazil, but was susceptible to a Bacillus subtilis-based probiotic added in feed in a related study. This work aimed to (i) report clinical symptoms caused by SH UFPR1 in broilers, (ii) study its susceptibility to some antibiotics in vitro, and (iii) SCOA in vivo; and (iv) relate these phenotypic observations with its genome characteristics...
2017: Frontiers in Veterinary Science
https://www.readbyqxmd.com/read/29151897/community-acquired-infection-with-hypervirulent-clostridium-difficile-isolates-that-carry-different-toxin-and-antibiotic-resistance-loci-a-case-report
#2
Marina Muñoz, Milena Camargo, Dora Inés Ríos-Chaparro, Paula Gómez, Manuel Alfonso Patarroyo, Juan David Ramírez
Background: Clostridium difficile infection (CDI) leads to the onset of antibiotic-associated diarrhea (AAD) and a wide range of gastrointestinal pathologies. Currently, CDI is one of the most important opportunistic infections at the intrahospital level and an exponential increase in community-acquired infections has been reported. Herein, we evaluated the relationships (at phylogenetic and genetic population structure levels), as well as the molecular toxigenic and antibiotic resistance profiles of a set of isolates established from a case of community acquired-CDI...
2017: Gut Pathogens
https://www.readbyqxmd.com/read/29148595/determination-of-cefoperazone-and-sulbactam-in-serum-by-hplc-ms-ms-an-adapted-method-for-therapeutic-drug-monitoring-in-children
#3
Xiu-Jun Wu, Xin Huang, Hai-Yan Shi, Xing-Kai Chen, Qian Dong, Guo-Xiang Hao, Yan Li, Yi Zheng, Wei Zhao
A rapid, accurate and specific high-performance liquid chromatographic -tandem mass spectrometry method has been validated for the simultaneous determination of cefoperazone and sulbactam in a small volume sample for children. A Shim-pack XR-ODS C18 column with gradient elution of water (0.1% formic acid) and acetonitrile (0.1% formic acid) solution was used for separation at a flow rate of 0.3 mL/min. The calibration curves of two analytes in serum showed excellent linearity over the concentration ranges of 0...
November 17, 2017: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/29133555/the-frequency-and-mechanism-of-spontaneous-resistance-to-sulbactam-combined-with-the-novel-%C3%AE-lactamase-inhibitor-etx2514-in-clinical-isolates-of-acinetobacter-baumannii
#4
Sarah M McLeod, Adam B Shapiro, Samir H Moussa, Michele Johnstone, Robert E McLaughlin, Boudewijn L M de Jonge, Alita A Miller
The novel diazabicyclooctenone ETX2514 is a potent, broad spectrum serine β-lactamase inhibitor that restores sulbactam activity against resistant Acinetobacter baumannii. The frequency of spontaneous resistance to sulbactam-ETX2514 in clinical isolates was found to be 7.6x10(-10) to <9.0x10(-10) at 4x MIC and mapped to residues near the active site of PBP3. Purified mutant PBP3 proteins demonstrated reduced affinity for sulbactam. In a sulbactam-sensitive isolate, resistance also mapped to stringent response genes associated with resistance to PBP2 inhibitors, suggesting that, in addition to β-lactamase inhibition, ETX2514 may also enhance sulbactam activity in A...
November 13, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29118410/the-microbiological-characteristics-and-risk-factors-for-picc-related-bloodstream-infections-in-intensive-care-unit
#5
Shumin Zhang, Xiaofeng Sun, Yan Lei
The study was aimed to investigate the pathogens distribution and risk factors for PICC-related bloodstream infection in intensive care unit (ICU) patients. 402 patients placed with PICC in ICU were recruited in the study. The microbiological characteristics of PICC-related infection were investigated by Vitek 2 Compact automated microbial system. Antibiotics sensitivity was performed with disk diffusion and minimum inhibitory concentration (MIC) methods. Multivariate logistic and cox analyses were performed to identify the risk factors for PICC-related infection in ICU patients...
November 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29108947/antibiotic-strategies-and-clinical-outcomes-in-critically-ill-patients-with-pneumonia-caused-by-carbapenem-resistant-acinetobacter-baumannii
#6
Chun-An Liang, Ying-Chi Lin, Po-Liang Lu, Huang-Chi Chen, Hsu-Liang Chang, Chau-Chyun Sheu
OBJECTIVES: This study aimed to investigate antibiotic prescribing patterns and effectiveness of different anti-carbapenem-resistant Acinetobacter baumannii (CRAB) strategies for CRAB pneumonia. METHODS: We conducted a multicenter, retrospective study in three hospitals. During 2010-2015, adult ICU patients with CRAB pneumonia treated with at least one antimicrobial agent covering the CRAB isolate in vitro for more than two days were included. We used multivariate logistic regression to analyze the associations of anti-CRAB strategies with ICU mortality and other clinical outcomes...
November 3, 2017: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/29093391/a-case-of-daptomycin-induced-eosinophilic-pneumonia-and-a-review-of-the-published-literature
#7
Yoshitsugu Higashi, Shigeki Nakamura, Yasuhiro Tsuji, Chika Ogami, Kaoru Matsumoto, Koyomi Kawago, Kotaro Tokui, Ryuji Hayashi, Ippei Sakamaki, Yoshihiro Yamamoto
A 53-year-old man was admitted to the hospital with a diagnosis of cellulitis and osteomyelitis. Twenty-four days after the initiation of daptomycin and sulbactam/ampicillin, he developed a fever and pulmonary infiltration. Bronchoalveolar lavage revealed a high number of eosinophils, while an intracutaneous test revealed positivity for daptomycin. The patient improved after discontinuing antimicrobial therapy. The plasma daptomycin minimum concentration (Cmin) was elevated (27.4 μg/mL), but plasma protein binding of daptomycin was low (87...
November 1, 2017: Internal Medicine
https://www.readbyqxmd.com/read/29089940/prevalence-molecular-characterization-and-antibiotic-susceptibility-of-cronobacter-sakazakii-isolates-from-powdered-infant-formula-collected-from-chinese-retail-markets
#8
Peng Fei, Yichao Jiang, Yan Jiang, Xiujuan Yuan, Tongxiang Yang, Junliang Chen, Ziyuan Wang, Huaibin Kang, Stephen J Forsythe
Cronobacter sakazakii is an opportunistic pathogen that causes severe infections in neonates and infants through contaminated powdered infant formula (PIF). Therefore, the aim of this study was a large-scale study on determine the prevalence, molecular characterization and antibiotic susceptibility of C. sakazakii isolates from PIF purchased from Chinese retail markets. Two thousand and twenty PIF samples were collected from different institutions. Fifty-six C. sakazakii strains were isolated, and identified using fusA sequencing analysis, giving a contamination rate of 2...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29084336/effectiveness-of-%C3%AE-lactam-monotherapy-vs-macrolide-combination-therapy-for-children-hospitalized-with-pneumonia
#9
Derek J Williams, Kathryn M Edwards, Wesley H Self, Yuwei Zhu, Sandra R Arnold, Jonathan A McCullers, Krow Ampofo, Andrew T Pavia, Evan J Anderson, Lauri A Hicks, Anna M Bramley, Seema Jain, Carlos G Grijalva
Importance: β-Lactam monotherapy and β-lactam plus macrolide combination therapy are both common empirical treatment strategies for children hospitalized with pneumonia, but few studies have evaluated the effectiveness of these 2 treatment approaches. Objective: To compare the effectiveness of β-lactam monotherapy vs β-lactam plus macrolide combination therapy among a cohort of children hospitalized with pneumonia. Design, Setting, and Participants: We analyzed data from the Etiology of Pneumonia in the Community Study, a multicenter, prospective, population-based study of community-acquired pneumonia hospitalizations conducted from January 1, 2010, to June 30, 2012, in 3 children's hospitals in Nashville, Tennessee; Memphis, Tennessee; and Salt Lake City, Utah...
October 30, 2017: JAMA Pediatrics
https://www.readbyqxmd.com/read/29083525/antibiotic-prophylaxis-in-clean-contaminated-head-and-neck-cases-with-microvascular-free-flap-reconstruction-a-systematic-review-and-meta-analysis
#10
REVIEW
Yarah M Haidar, Prem B Tripathi, Tjoson Tjoa, Sartaaj Walia, Lishi Zhang, Yanjun Chen, Danh V Nguyen, Hossein Mahboubi, William B Armstrong, Julie A Goddard
BACKGROUND: Optimal antibiotic prophylaxis duration in head and neck clean-contaminated free-flap cases is unknown. METHODS: A systematic review/meta-analysis was conducted using PubMed/MEDLINE, Cochrane Library, Web-of-Science, and Scopus databases. RESULTS: Of the 3755 searched articles, 5 articles were included for a total of 861 patients. The recipient surgical site infection risk was significantly higher in patients receiving prophylactic antibiotics for ≤24 hours compared to >24 hours (relative risk [RR] 1...
October 30, 2017: Head & Neck
https://www.readbyqxmd.com/read/29069421/comparative-efficacy-and-safety-of-treatment-options-for-mdr-and-xdr-acinetobacter-baumannii-infections-a-systematic-review-and-network-meta-analysis
#11
Kirati Kengkla, Khachen Kongpakwattana, Surasak Saokaew, Anucha Apisarnthanarak, Nathorn Chaiyakunapruk
Objectives: To comprehensively compare and rank the efficacy and safety of available treatment options for patients with MDR and XDR Acinetobacter baumannii (AB) infection. Methods: We searched PubMed, Embase and the Cochrane register of trials systematically for studies that examined treatment options for patients with MDR- and XDR-AB infections until April 2016. Network meta-analysis (NMA) was performed to estimate the risk ratio (RR) and 95% CI from both direct and indirect evidence...
October 24, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/29067059/phenotypic-characterization-of-extended-spectrum-beta-lactamase-producing-e-coli-from-healthy-individuals-patients-sewage-sludge-cattle-chickens-and-raw-meat
#12
Rabia Saleem, Hasan Ejaz, Aizza Zafar, Sonia Younas, Ahsan Waheed Rathore
OBJECTIVE: The present study aimed to determine the frequency and antimicrobial profile of ESBL-producing isolates of E. coli in different environments. METHODS: This cross-sectional study was conducted at The Children's Hospital and The Institute of Child Health, Lahore from July to December 2015. The faecal specimens from healthy individuals, patients, sewage sludge, cattle, chickens and raw meat (n = 122) were processed for microbiological analysis using MacConkey agar supplemented with cefotaxime...
July 2017: Pakistan Journal of Medical Sciences Quarterly
https://www.readbyqxmd.com/read/29062709/encapsulated-pleural-effusion-due-to-haemophilus-influenzae-biotype-ii-in-a-child-with-trisomy-21-a-case-report-and-literature-review
#13
Masanori Kaneko, Yuki Bando, Tomohiro Fujita, Yoneji Hirose, Eisuke Suganuma, Masahiro Ishii, Takashi Takahashi
Haemophilus influenzae (Hi) can colonize in the upper respiratory tract and cause severe pulmonary infections, especially among immunocompromised children. Herein, we report a case of left encapsulated pleural effusion (EPE) due to Hi in a 24-month-old girl with trisomy 21. She was already vaccinated against Hi type b. The Hi biotype II was isolated from both the blood and aspirated sputum obtained upon admission. Ampicillin/sulbactam 180 mg/kg/day was administered intravenously for 34 days with oxygen supplementation for 4 days...
2017: IDCases
https://www.readbyqxmd.com/read/29061006/-efficacy-of-extended-infusion-of-carbapenem-plus-sulbactam-for-ventilator-associated-pneumonia-caused-by-extensive-drug-resistant-acinetobacter-baumannii
#14
X Wang, Y Hu, C L Que, H Zhang, J J Huang, J Cao, Z Jin, G F Wang, W Zhang
Objective: To evaluate the efficacy of extended-infusion of carbapenem plus sulbactam for ventilator-associated pneumonia caused by extensive drug-resistant Acinetobacter baumannii (XDRAB). Methods: Clinical data of patients with ventilator-associated pneumonia caused by XDRAB who were treated with extended-infusion carbapenem plus sulbactam or tigecycline-based therapy in Peking University First Hospital from January 2015 to December 2016 were collected and reviewed in this retrospective study. Twenty-one patients were treated with extended-infusion carbapenem plus sulbactam, and 20 other patients received tigecycline combined with other antibiotics...
October 17, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/29037802/the-impact-of-inoculum-size-on-the-activity-of-cefoperazone-sulbactam-against-multidrug-resistant-organisms
#15
Ping-Chin Chang, Chi-Chung Chen, Ying Chen Lu, Chih-Cheng Lai, Hui-Ling Huang, Yin-Ching Chuang, Hung-Jen Tang
OBJECTIVES: This study aims to assess the in vitro activity of cefoperazone alone and different cefoperazone-sulbactam ratios against different inoculum sizes of multidrug resistant organisms. METHODS: Minimum inhibitory concentrations (MICs) of cefoperazone, cefoperazone-sulbactam at fixed ratio of 1:1 and 2:1 against a normal inoculum size of 5 × 10(5) CFU/ml and a high inoculum size of 5 × 10(7) CFU/ml were measured. RESULTS: Each 33 isolates of extended-spectrum β-lactamases (ESBL)-producing Escherichiacoli, ESBL-producing Klebsiellapneumoniae, carbapenem-resistant E...
October 6, 2017: Journal of Microbiology, Immunology, and Infection, Wei Mian Yu Gan Ran za Zhi
https://www.readbyqxmd.com/read/28971874/modified-penicillin-molecule-with-carbapenem-like-stereochemistry-specifically-inhibits-class-c-%C3%AE-lactamases
#16
Xuehua Pan, Yunjiao He, Tianfeng Chen, Kin-Fai Chan, Yanxiang Zhao
Bacterial β-lactamases readily inactivate most penicillins and cephalosporins by hydrolyzing and "opening" their signature β-lactam ring. In contrast, carbapenems resist hydrolysis by many serine-based Class A, C and D β-lactamases due to their unique stereochemical features. To improve the resistance profile of penicillins, we synthesized a modified penicillin molecule MPC-1 by "grafting" carbapenem-like stereochemistry onto the penicillin core. Chemical modifications include the trans conformation of hydrogen atoms at C5 and C6 instead of cis, and a 6-α hydroxyethyl moiety to replace the original 6-β aminoacyl group...
October 2, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28971872/kinetics-of-sulbactam-hydrolysis-by-%C3%AE-lactamases-and-their-inhibition
#17
Adam B Shapiro
Sulbactam is one of 4 β-lactamase inhibitors in current clinical use to counteract drug resistance caused by degradation of β-lactam antibiotics by these bacterial enzymes. As a β-lactam itself, sulbactam is susceptible to degradation by β-lactamases. We investigated the Michaelis-Menten kinetics of sulbactam hydrolysis by 14 β-lactamases representing clinically widespread groups within all 4 Ambler classes: CTX-M-15, KPC-2, SHV-5, and TEM-1 for class A; IMP-1, NDM-1, and VIM-1 for class B; Acinetobacter baumannii ADC-7, Pseudomonas aeruginosa AmpC and Enterobacter cloacae P99 for class C; and OXA-10, OXA-23, OXA-24, and OXA-48 for class D...
October 2, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28962078/effects-of-specific-egg-yolk-immunoglobulin-on-pan-drug-resistant-acinetobacter-baumannii
#18
Huaying Shi, Jie Zhu, Boyang Zou, Lei Shi, Linying Du, Yayi Long, Huaxin Wang, Hong Xu, Yuhong Zhen, Lidan Sun
With the growing emergence of pan-drug-resistant Acinetobacter baumannii (PDR-Ab) strains in clinical, new strategies for the treatment of PDR-Ab infections are urgently needed. Egg yolk immunoglobulin (IgY) as a convenient and inexpensive antibody has been widely applied to the therapy of infectious diseases. The aim of this study was to produce IgY specific to PDR-Ab and investigate its antibacterial effects in vitro and in vivo. IgYs specific to two PDR-Ab strains were produced by immunizing hens with formaldehyde inactivated PDR-Ab cells and isolated from yolks with a purity of 90% by water dilution, salt precipitations and ultrafiltration...
November 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28956494/in-vitro-effect-of-subminimal-inhibitory-concentrations-of-antibiotics-on-the-biofilm-formation-ability-of-acinetobacter-baumannii-clinical-isolates
#19
Maja Bogdan, Domagoj Drenjancevic, Ivana Harsanji Drenjancevic, Branka Bedenic, Vlasta Zujic Atalic, Jasminka Talapko, Dubravka Vukovic
The ability of A cinetobacter baumannii strains to form biofilm is one of the most important virulence factor which enables bacterial survival in a harsh environment and decreases antibiotic concentration as well. Subminimal inhibitory concentrations (subMICs) of antibiotics may change bacterial ultrastructure or have an influence on some different molecular mechanisms resulting in morphological or physiological changes in bacteria itself. The aim of this study was to determine effects of 1/2, 1/4, 1/8 and 1/16 minimal inhibitory concentrationsof imipenem, ampicillin-sulbactam, azithromycin, rifampicin and colistin on biofilm formation ability of 22 biofilm non-producing and 46 biofilm producing A...
September 28, 2017: Journal of Chemotherapy
https://www.readbyqxmd.com/read/28943535/clostridium-paraputrificum-bacteremia-in-an-older-patient-with-no-predisposing-medical-condition
#20
Miho Fukui, Shunsuke Iwai, Ryunosuke Sakamoto, Hiroko Takahashi, Tsuneo Hayashi, Tsuneaki Kenzaka
We herein report a rare case of Clostridium paraputrificum bacteremia in an elderly (88-year-old) man without a predisposing medical condition. Although he had a history of anaerobic bacteremia approximately eight months prior to admission, no gastrointestinal disease was discovered. He was treated with intravenous ampicillin/sulbactam. This case suggests that C. paraputrificum bacteremia can result from only minor abnormalities in macroscopically normal mucosal barriers. To our knowledge, this is the first report of C...
September 25, 2017: Internal Medicine
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