Archive for July, 2013

HIV Coinfection With Hepatitis C Virus: Evolving Epidemiology and Treatment Paradigms

CID 2012:55 (Suppl 1)

Lynn E. Taylor,1 Tracy Swan,2 and Kenneth H. Mayer3,4,5

1Department of Medicine, Brown University, Providence, Rhode Island;

2Treatment Action Group, New York, New York;

3Beth Israel DeaconessMedical Center,

4Harvard Medical School, and

5The Fenway Institute, Fenway Health, Boston, Massachusetts

Chronic hepatitis C virus (HCV) infection has become a major threat to the survival of human immunodeficiency virus (HIV)–infected persons in areas where antiretroviral therapy is available. In coinfection, viral eradication has been difficult to attain, and HCV therapy is underused. Novel therapies may be particularly beneficial for this population, yet studies lag behind those for HCV monoinfection. Increasingly, incident

HCV among HIV-infected men who have sex with men is associated with sexual risk behavior further research should be performed to refine understanding of the causal mechanism of this association. The phenomenon of aggressive hepatic fibrogenesis when HIV infection precedes HCV acquisition requires longer-term observation to ensure optimal timing of HCV therapy. Medical management in coinfection will be improved by enhancing HCV detection, with annual serologic testing, screening with HCV RNA to detect acute infection, and HIV testing of HCV-infected individuals; by addressing HCV earlier in coinfected persons; and by universal consideration for HCV therapy. HCV drug trials in individuals coinfected with HIV should be expedited. HIV/HCV coinfection remains a growing and evolving epidemic; new developments in therapeutics and improved care models offer promise.

PDF

http://cid.oxfordjournals.org/content/55/suppl_1/S33.full.pdf+html

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July 28, 2013 at 7:12 pm

Guidance of antibiotic therapy with procalcitonin in lower respiratory tract infections: insights into the ProHOSP study.

Virulence. 2010 Mar-Apr;1(2):88-92.

Schuetz P, Christ-Crain M, Albrich W, Zimmerli W, Mueller B; ProHOSP Study Group.

Collaborators (45)

Source

Department of Internal Medicine, Division of Endocrinology, Diabetes and Clinical Nutrition, University Hospital Basel, Basel, Switzerland. SchuetzP@uhbs.ch

Abstract

In the recently published ProHOSP trial, we investigated the safety and external validity of procalcitonin (PCT) guidance for antibiotic therapy in patients with different severities of lower respiratory tract infections, mainly pneumonia. In this addendum, we aim to extend the initial report by reinforcing the rational of the PCT algorithm and by presenting more detailed data on antibiotic therapy in different severities of infection. In milder, mostly viral respiratory infections (i.e. acute or chronic bronchitis) initial prescription of antibiotics was markedly reduced by PCT guidance because PCT remained low in most patients. In pneumonia, PCT showed a severity-dependent increase and highest levels in patients with positive blood cultures. Thus, the main effect in pneumonia was a severity- and bacteremia-adapted reduction of the duration of antibiotic courses. In lower respiratory tract infections, PCT guidance had a differential effect on antibiotic exposure depending on the underlying type and severity of respiratory tract infection.

PDF

http://www.landesbioscience.com/journals/virulence/SchuetzVIRU1-2.pdf

July 28, 2013 at 3:06 pm

Protecting the tuberculosis drug pipeline: stating the case for the rational use of fluoroquinolones.

Eur Respir J. 2012 Oct;40(4):814-22.

Migliori GB, Langendam MW, D’Ambrosio L, Centis R, Blasi F, Huitric E, Manissero D, van der Werf MJ.

Source

WHO Collaborating Centre for TB and Lung Diseases, Fondazione S. Maugeri, Care and Research Institute, Tradate, Italy.

Abstract

The use of fluoroquinolones (FQs) to treat lower respiratory tract infections (LTRI) other than tuberculosis (TB) allows selection of FQ-resistant TB when TB is misdiagnosed. This study maps national guidelines on the use of FQs for LRTI in Europe and determines the risk of FQ-resistant TB upon FQ treatment before TB diagnosis. A questionnaire was developed to map existing national LRTI and community-acquired pneumonia (CAP) guidelines. A systematic review and meta-analysis were performed to determine the risk of FQ-resistant TB if prescribed FQs prior to TB diagnosis. 15 (80%) out of 24 responding European Respiratory Society national delegates reported having national LRTI management guidelines, seven including recommendations on FQ use and one recommending FQs as the first-choice drug. 18 out of 24 countries had national CAP management guidelines, two recommending FQ as the drug of choice. Six studies investigating FQ exposure and the risk of FQ-resistant TB were analysed. TB patients had a three-fold higher risk of having FQ-resistant TB when prescribed FQs before TB diagnosis, compared to non FQ-exposed patients (OR 2.81, 95% CI 1.47-5.39). Although the majority of European countries hold national LRTI/CAP guidelines, our results suggest that a risk of developing FQ resistance exists. Further strengthening of, and adherence to, guidelines is needed to ensure rational use of FQs.

PDF

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3461345/pdf/erj-40-04-814.pdf

July 28, 2013 at 3:04 pm

Edema palpebral como expresión oligosintomática de Mononucleosis Infecciosa

Rev Pediatr Aten Primaria 2012; 14:139-143

(Eyelid edema as an oligosymptomatic expression of Infectious Mononucleosis)

C.Remón García, M. A. Palacios Soria, M. Praena Crespo

Unidad de Pediatria, Hospital Infantil Virgen del Rocío, Sevilla (España)

La MI es una enfermedad frecuente en edad pediátrica, cuya máxima incidencia se encuentra en la 1ra infancia y en la adoescencia ó inicio de edad adulta. El edema palpebral bilateral (EPB) puede ser un hallazgo clínico sutil en el curso de dicha entidad, y aunque no forma parte de los síntomas característicos, puede estar presente al inicio del cuadro hasta en un tercio de los pacientes. Presentamos cuatro casos clínicos, en los cuales el EPB es el síntoma guía que orienta al diagnóstico, reflexionando así sobre la necesidad de incluir la MI dentro del diagnóstico diferencial planteado frente al edema palpebral.

PDF

http://www.pap.es/files/1116-1491-pdf/pap54_06.pdf

July 28, 2013 at 3:00 pm

Novel therapies for treatment of multi-drug resistant Acinetobacter baumannii skin infections.

Virulence. 2011 Mar-Apr;2(2):97-102.

Mihu MR, Martinez LR.

Source

Department of Medicine, Sound Shore Medical Center of Westchester, New Rochelle, NY, USA.

Abstract

The Gram-negative coccobacillus Acinetobacter baumannii (Ab) has become an increasingly prevalent cause of hospital-acquired infections during the last two decades primarily resulting in pneumonia and complicated infections, including wound infections in troops injured in Afghanistan and Iraq. Moreover, the majority of clinical Ab isolates display high-level resistance to commonly utilized antimicrobial drugs, which severely compromises our capacity to care for patients with Ab disease. Thus, radically new approaches are urgently needed. This review focuses on novel therapies that can challenge the evolving ability of Ab to develop resistance and cause disease.

PDF

http://www.landesbioscience.com/journals/virulence/MihuVIRU2-2.pdf

 

 

Acinetobacter baumannii, nosocomial infections, multidrug-resistant, antimicrobial therapy

July 28, 2013 at 2:58 pm

Multidrug-resistant Acinetobacter spp.: increasingly problematic nosocomial pathogens.

Yonsei Med J. 2011 Nov;52(6):879-91.

Lee K, Yong D, Jeong SH, Chong Y.

Source

Department of Laboratory Medicine, Yonsei University College of Medicine, Seoul, Korea.

Abstract

Pathogenic bacteria have increasingly been resisting to antimicrobial therapy. Recently, resistance problem has been relatively much worsened in Gram-negative bacilli. Acinetobacter spp. are typical nosocomial pathogens causing infections and high mortality, almost exclusively in compromised hospital patients. Acinetobacter spp. are intrinsically less susceptible to antibiotics than Enterobacteriaceae, and have propensity to acquire resistance. A surveillance study in Korea in 2009 showed that resistance rates of Acinetobacter spp. were very high: to fluoroquinolone 67%, to amikacin 48%, to ceftazidime 66% and to imipenem 51%. Carbapenem resistance was mostly due to OXA type carbapenemase production in A. baumannii isolates, whereas it was due to metallo-β-lactamase production in non-baumannii Acinetobacter isolates. Colistin-resistant isolates were rare but started to be isolated in Korea. Currently, the infection caused by multidrug-resistant A. baumannii is among the most difficult ones to treat. Analysis at tertiary care hospital in 2010 showed that among the 1,085 isolates of Acinetobacter spp., 14.9% and 41.8% were resistant to seven, and to all eight antimicrobial agents tested, respectively. It is known to be difficult to prevent Acinetobacter spp. infection in hospitalized patients, because the organisms are ubiquitous in hospital environment. Efforts to control resistant bacteria in Korea by hospitals, relevant scientific societies and government agencies have only partially been successful. We need concerted multidisciplinary efforts to preserve the efficacy of currently available antimicrobial agents, by following the principles of antimicrobial stewardship.

PDF

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3220254/pdf/ymj-52-879.pdf

 

 

Acinetobacter baumannii, multidrug resistance, OXA type carbapenemase, metallo-β-lactamase

July 28, 2013 at 2:57 pm

Colistin resistance of Acinetobacter baumannii: clinical reports, mechanisms and antimicrobial strategies.

J Antimicrob Chemother. 2012 Jul;67(7):1607-15.

Cai Y, Chai D, Wang R, Liang B, Bai N.

Source

Department of Clinical Pharmacology, PLA General Hospital, Beijing 100853, People’s Republic of China.

Abstract

Colistin is the last resort for treatment of multidrug-resistant Acinetobacter baumannii. Unfortunately, resistance to colistin has been reported all over the world. The highest resistance rate was reported in Asia, followed by Europe. The heteroresistance rate of A. baumannii to colistin is generally higher than the resistance rate. The mechanism of resistance might be loss of lipopolysaccharide or/and the PmrAB two-component system. Pharmacokinetic/pharmacodynamic studies revealed that colistin monotherapy is unable to prevent resistance, and combination therapy might be the best antimicrobial strategy against colistin-resistant A. baumannii. Colistin/rifampicin and colistin/carbapenem are the most studied combinations that showed promising results in vitro, in vivo and in the clinic. New peptides showing good activity against colistin-resistant A. baumannii are also being investigated.

PDF

http://jac.oxfordjournals.org/content/67/7/1607.full.pdf+html

multidrug resistance, heteroresistance, combination therapy

July 28, 2013 at 2:52 pm

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