Emerging and rapidly spreading multidrug resistant bacteria constitute a rising public health concern worldwide. Acinetobacter baumannii is one of these bacteria that cause different infections including pneumonia, ba...Emerging and rapidly spreading multidrug resistant bacteria constitute a rising public health concern worldwide. Acinetobacter baumannii is one of these bacteria that cause different infections including pneumonia, bacteremia, meningitis, soft-tissue, and urinary tract infections, and are associated with high mortality and economic burden. We present a case of a 43-year-old woman, admitted at the department of orthopedics, regional hospital of Ourossogui, North-East of Senegal for soft-tissue injuries. Initially diagnosed with Yersinia pestis infection, the patient was well managed before being released. Supplementary sampling for confirmatory tests allowed the detection of an extensively drug-resistant Acinetobacter baumannii clone.展开更多
Rationale:Salmonella(S.)typhi is a rare cause of osteomyelitis in immunocompetent adults.Extensive drug resistance(XDR)may lead to more complicated cases of S.typhi osteomyelitis.Patient concern:A 55-year-old female p...Rationale:Salmonella(S.)typhi is a rare cause of osteomyelitis in immunocompetent adults.Extensive drug resistance(XDR)may lead to more complicated cases of S.typhi osteomyelitis.Patient concern:A 55-year-old female presented with a persistent low-grade fever and a swelling on her lower left chest with a sinus discharging purulent fluid for the past 8 months.Her symptoms had been unresponsive to previous anti-microbial therapy.Diagnosis:Rib osteomyelitis caused by XDR S.typhi.Interventions:Surgical wound debridement,left 7th-9th rib resection and intravenous Ⅳ meropenem were done.Outcome:Fever resolved and left-sided swelling resected without recurrence.Lessons:The prevalence of XDR S.typhi is growing in South Asia and should be considered as the differential diagnosis of chronic osteomyelitis.展开更多
Background： Acinetobacter baumannii has emerged as an important pathogen causing a variety of infections. Using data from the China Surveillance of Antimicrobial Resistance Program conducted biennially, we investigat...Background： Acinetobacter baumannii has emerged as an important pathogen causing a variety of infections. Using data from the China Surveillance of Antimicrobial Resistance Program conducted biennially, we investigated the secular changes in the resistance of 2917 isolates ofA. baumannii from 2004 to 2014 to differ antimicrobial agents. Methods： Pathogen samples were collected from 17 to 20 hospitals located in the eastern, central, and western regions of China. Minimum inhibitory concentrations （MICs） were determined by a 2-fold agar dilution method, and antimicrobial susceptibility was established using the 2014 Clinical Laboratory Standards Institute-approved breakpoints. Isolates not susceptible to all the tested aminoglycosides, fluoroquinolones, β-lactams, β-lactam/β-lactam inhibitors and carbapenems were defined as extensively drug resistant. Results： The rates of nonsusceptibility to common antimicrobial agents remained high （〉65%） over the years with some fluctuations to certain agents. The prevalence of imipenem-resistant A. batmlannii （IRAB） increased from 13.3% in 2004 to 70.5% in 2014 and that of extensively drug-resistant A. haumannii （XDRAB） increased from I1.1% in 2004 to 60.4% in 2014. The activity of tigecycline was stable with MIC,≤4 mg/L against A. baumannii from 2009 to 2014. Susceptibility to colistin remained high （97.0%） from 2009 to 2014. The prevalence of XDRAB increased in all the three surveillance regions over the years and was significantly higher in Intensive Care Unit （ICU） wards than non-lCU wards. Conclusions： This longitudinal multicenter surveillance program revealed the nationwide emergence of A. baumnnii in China and showed a significant increase in prevalence from 2004 to 2014. High levels of bacterial resistance were detected among samples collected from clinical settings in China, with IRAB and XDRAB being especially prevalent. This study will help to guide empirical therapy and identify at-risk groups requiring more intense interventional infection control measures, while also helping to focus surveillance efforts.展开更多
Tuberculosis(TB) is a leading cause of morbidity and mortality in more than one-third of the world population. Its impact on global health is a result of decades of neglect for such an important infectious disease, la...Tuberculosis(TB) is a leading cause of morbidity and mortality in more than one-third of the world population. Its impact on global health is a result of decades of neglect for such an important infectious disease, lack of resources for national TB control programs, poor case detection, and inadequate/inappropriate therapy in high-burden countries. The worldwide dissemination of multidrug(MDR) and extensively drug resistant(XDR) Mycobacterium tuberculosis poses a serious threat to human health due to inadequacy of long and cumbersome tuberculosis(TB) therapy. Treatment regimens consist of at least four drugs with different mechanisms of action. Several new molecules in clinical development hasencouraged the scientific community to discover new drug targets and new drug candidates. Therefore, new drugs are urgently needed to shorten and improve the treatment course in drug resistant TB, and to minimize the occurrence of new infections and death. Nowadays, various new investigational drugs, such as bedaquine(TMC207), nitroimidazoles(PA-824, OPC-67683), diamines(SQ109), oxazolidinones(Linezolid, PNU-100480(Sutezolid), ADZ5847), pyrroles(LL3858) and fluoroquinolones(moxifloxacin and gatifloxacin), have entered clinical trials and are in progress to be developed for the treatment of MDR-TB. In this perspectivearticle, an overview of the new anti-TB drugs with different structures that are either being clinically used or in advanced stages clinical stages as well as of preclinical development are presented. This review provides snapshots of the efforts that are being made in the development of new drugs as lead anti-TB agents. Finally, it is crucial to improve the connection between research and development institutes, industries, drug contro l authorities, and international policy-making bodies to deliver efficacious therapies for patients who are suffering from TB.展开更多
文摘Emerging and rapidly spreading multidrug resistant bacteria constitute a rising public health concern worldwide. Acinetobacter baumannii is one of these bacteria that cause different infections including pneumonia, bacteremia, meningitis, soft-tissue, and urinary tract infections, and are associated with high mortality and economic burden. We present a case of a 43-year-old woman, admitted at the department of orthopedics, regional hospital of Ourossogui, North-East of Senegal for soft-tissue injuries. Initially diagnosed with Yersinia pestis infection, the patient was well managed before being released. Supplementary sampling for confirmatory tests allowed the detection of an extensively drug-resistant Acinetobacter baumannii clone.
文摘Rationale:Salmonella(S.)typhi is a rare cause of osteomyelitis in immunocompetent adults.Extensive drug resistance(XDR)may lead to more complicated cases of S.typhi osteomyelitis.Patient concern:A 55-year-old female presented with a persistent low-grade fever and a swelling on her lower left chest with a sinus discharging purulent fluid for the past 8 months.Her symptoms had been unresponsive to previous anti-microbial therapy.Diagnosis:Rib osteomyelitis caused by XDR S.typhi.Interventions:Surgical wound debridement,left 7th-9th rib resection and intravenous Ⅳ meropenem were done.Outcome:Fever resolved and left-sided swelling resected without recurrence.Lessons:The prevalence of XDR S.typhi is growing in South Asia and should be considered as the differential diagnosis of chronic osteomyelitis.
文摘Background： Acinetobacter baumannii has emerged as an important pathogen causing a variety of infections. Using data from the China Surveillance of Antimicrobial Resistance Program conducted biennially, we investigated the secular changes in the resistance of 2917 isolates ofA. baumannii from 2004 to 2014 to differ antimicrobial agents. Methods： Pathogen samples were collected from 17 to 20 hospitals located in the eastern, central, and western regions of China. Minimum inhibitory concentrations （MICs） were determined by a 2-fold agar dilution method, and antimicrobial susceptibility was established using the 2014 Clinical Laboratory Standards Institute-approved breakpoints. Isolates not susceptible to all the tested aminoglycosides, fluoroquinolones, β-lactams, β-lactam/β-lactam inhibitors and carbapenems were defined as extensively drug resistant. Results： The rates of nonsusceptibility to common antimicrobial agents remained high （〉65%） over the years with some fluctuations to certain agents. The prevalence of imipenem-resistant A. batmlannii （IRAB） increased from 13.3% in 2004 to 70.5% in 2014 and that of extensively drug-resistant A. haumannii （XDRAB） increased from I1.1% in 2004 to 60.4% in 2014. The activity of tigecycline was stable with MIC,≤4 mg/L against A. baumannii from 2009 to 2014. Susceptibility to colistin remained high （97.0%） from 2009 to 2014. The prevalence of XDRAB increased in all the three surveillance regions over the years and was significantly higher in Intensive Care Unit （ICU） wards than non-lCU wards. Conclusions： This longitudinal multicenter surveillance program revealed the nationwide emergence of A. baumnnii in China and showed a significant increase in prevalence from 2004 to 2014. High levels of bacterial resistance were detected among samples collected from clinical settings in China, with IRAB and XDRAB being especially prevalent. This study will help to guide empirical therapy and identify at-risk groups requiring more intense interventional infection control measures, while also helping to focus surveillance efforts.
文摘Tuberculosis(TB) is a leading cause of morbidity and mortality in more than one-third of the world population. Its impact on global health is a result of decades of neglect for such an important infectious disease, lack of resources for national TB control programs, poor case detection, and inadequate/inappropriate therapy in high-burden countries. The worldwide dissemination of multidrug(MDR) and extensively drug resistant(XDR) Mycobacterium tuberculosis poses a serious threat to human health due to inadequacy of long and cumbersome tuberculosis(TB) therapy. Treatment regimens consist of at least four drugs with different mechanisms of action. Several new molecules in clinical development hasencouraged the scientific community to discover new drug targets and new drug candidates. Therefore, new drugs are urgently needed to shorten and improve the treatment course in drug resistant TB, and to minimize the occurrence of new infections and death. Nowadays, various new investigational drugs, such as bedaquine(TMC207), nitroimidazoles(PA-824, OPC-67683), diamines(SQ109), oxazolidinones(Linezolid, PNU-100480(Sutezolid), ADZ5847), pyrroles(LL3858) and fluoroquinolones(moxifloxacin and gatifloxacin), have entered clinical trials and are in progress to be developed for the treatment of MDR-TB. In this perspectivearticle, an overview of the new anti-TB drugs with different structures that are either being clinically used or in advanced stages clinical stages as well as of preclinical development are presented. This review provides snapshots of the efforts that are being made in the development of new drugs as lead anti-TB agents. Finally, it is crucial to improve the connection between research and development institutes, industries, drug contro l authorities, and international policy-making bodies to deliver efficacious therapies for patients who are suffering from TB.
