A laboratory study of spontaneous platelet aggregation

During studies on platelet aggregation using the EEL platelet aggregation meter, 8% of the individuals tested were found to have platelets which aggregated spontaneously when citrated, platelet-rich plasma was stirred at 37 degrees C. The EEL aggregation meter differs from other machines in that it incorporates a vertical stirrer which subjects platelets to greater mechanical force. When using this machine it is suggested that spontaneous platelet aggregation is related to increased mechanical fragility of the platelets and low levels of plasma ADP-inhibitor.     

A new selective differential medium for isolation ofStenotrophomonas maltophilia

A new selective differential medium for the isolation ofStenotrophomonas (formerlyXanthomonas) maltophilia was developed. The medium, VIA agar, contained vancomycin, imipenem, and amphotericin B as selective agents and incorporated a mannitol/bromothymol blue indicator system. Compared withXanthomonas maltophilia Selective Medium (XMSM), VIA agar was less inhibitory toStenotrophomonas maltophilia and was more selective than XMSM in preventing the growth of unwanted bacteria from contaminated specimens. Although vancomycin-resistant strains ofEnterococcus faecium may grow on VIA agar, these can be easily distinguished fromStenotrophomonas maltophilia because of mannitol fermentation.     

Therapeutic approaches to the problem of biliary sludge and gallstone formation during total parenteral nutrition

Prolonged total parenteral nutrition is associated with the development of biliary sludge, which consists of super-saturated bile containing cholesterol crystals, bilirubin granules and a very high concentration of mucin glycoprotein. Reduced gallbladder contractility in TPN patients appears to be essential for the pathogenesis of sludge, which represents an important stage in the formation of gallstones, a common and well recognised complication of TPN. Possible approaches to the prevention of these biliary complications of TPN include: 1) inhibition of prostaglandin mediated mucin hypersecretion with aspirin, NSAIDs or possibly by n-3 essential fatty acids; 2) stimulation of gallbladder contractility by early oral feeding or the use of CCK; and 3) reduction of cholesterol saturation and mucin secretion by ursodeoxycholic acid.     

The CINOD, AZD3582, exhibits an improved gastrointestinal safety profile compared with naproxen in healthy volunteers

COX-inhibiting nitric oxide donators (CINODs) are a new class of drugs in development for the treatment of acute and chronic pain. They comprise a COX-inhibiting moiety linked to a nitric-oxide-donating component and are designed to provide an innovative mechanism of action of balanced COX inhibition and controlled nitric oxide donation. Through these pathways, CINODs should provide analgesic and anti-inflammatory efficacy, while offering gastrointestinal safety through the tissue-protective effects of nitric oxide donation. AZD3582 [4-(nitrooxy)butyl-(2S)-2-(6-methoxy-2-naphthyl)propanoate] is the first agent in the CINOD class to enter extensive clinical development. Pre-clinical studies demonstrate that AZD3582 has a superior gastrointestinal safety profile to naproxen, while demonstrating analgesic and anti-inflammatory efficacy. In healthy human volunteers, AZD3582 caused little gastrointestinal damage compared with equimolar doses of naproxen. Studies to evaluate the longer-term gastrointestinal safety of AZD3582, alongside its efficacy in alleviating chronic and acute pain, are ongoing.     

多重-PCR检测CTX-M超广谱β-内酰胺酶基因

目的建立一种多重PCR方法在肠杆菌中检测所有组的CTX-M基因。方法设计两组引物可分别在两个区域检测所有CTX-M组的大多数blaCTX-M基因。一条四组CTX-M基因的共同保守区引物与另外四条逆向引物或五条逆向引物一起同时使用可分别检测出每一组特异性CTX-M基因。PCR反应混合物体积25 ul含每条引物25 pM。对6株标准菌株(产CTX-M-26的肺炎克雷伯菌1株,分别产CTX-M-3,CTX-M-9及CTX-M-15的大肠杆菌各1株,产CTX-M-14的大肠杆菌2株)和90株临床分离株进行CTX-M检测。结果已知携带CTX-M的菌株作为标准均获得预期PCR产物,对90株临床分离株应用多重-PCR扩增,有68株获得阳性结果。进一步测序及分析显示,这些基因均为编码CTX-M-15超广谱β-内酰胺酶的基因。结论我们已成功设计一种多重PCR在单一反应管可同时检测多种CTX-M基因无须多次PCR反应。此方法可以快速准确检测出ESBLs表型阳性菌中CTX-M基因。     

Tuberculosis Microepidemics among Dispersed Migrants,Birmingham, UK, 2004–2013

To determine if local transmission was responsible for rising tuberculosis incidence in a recently dispersed migrant community in Birmingham, UK, during 2004–2013, we conducted enhanced epidemiologic investigation of molecular clusters. This technique identified exact locations of social mixing and chains of apparent recent transmission, which can be helpful for directing resources.     

Management of penile cancer patients during the COVID-19 pandemic: An eUROGEN accelerated Delphi consensus study

ObjectivesTo develop an international consensus on managing penile cancer patients during the COVID-19 acute waves. A major concern for patients with penile cancer during the coronavirus disease 2019 (COVID-19) pandemic is how the enforced safety measures will affect their disease management. Delays in diagnosis and treatment initiation may have an impact on the extent of the primary lesion as well as the cancer-specific survival because of the development and progression of inguinal lymph node metastases.Materials and methodsA review of the COVID-19 literature was conducted in conjunction with analysis of current international guidelines on the management of penile cancer. Results were presented to an international panel of experts on penile cancer and infection control by a virtual accelerated Delphi process using 4 survey rounds. Consensus opinion was defined as an agreement of ≥80%, which was used to reconfigure management pathways for penile cancer.ResultsLimited evidence is available for delaying penile cancer management. The consensus rate of agreement was 100% that penile cancer pathways should be reconfigured, and measures should be developed to prevent perioperative nosocomial transmission of COVID-19. The panel also reached a consensus on several statements aimed at reconfiguring the management of penile cancer patients during the COVID-19 pandemic.ConclusionsThe international consensus panel proposed a framework for the diagnostic and invasive therapeutic procedures for penile cancer within a low-risk environment for COVID-19.