Postinjury platelet aggregation and venous thromboembolism

alexandrossfakianakis shared this article with you from Inoreader Postinjury platelet aggregation and venous thromboembolism via Journal of Trauma and Acute Care Surgery - Current Issue BACKGROUND Posttraumatic venous thromboembolism (VTE) remains prevalent in severely injured patients despite chemoprophylaxis. Importantly, although platelets are central to thrombosis, they are not routinely targeted in prevention of posttraumatic VTE. Furthermore, platelets from injured patients show ex vivo evidence of increased activation yet impaired aggregation, consistent with functional exhaustion. However, the relationship of this platelet functional phenotype with development of posttraumatic VTE is unknown. We hypothesized that, following injury, impaired ex vivo platelet aggregation (PA) is associated with the development of posttraumatic VTE. METHODS We performed a secondary analysis of 133 severely injured patients from a prospective observational study investigating coagulation and inflammation (2011–2019). Platelet aggregation in response to stimulation with adenosine diphosphate (ADP), collagen, and thrombin was measured at presentation (preresuscitation) and 24 hours (postresuscitation). Viscoelastic clot strength and lysis were measured in parallel by thromboelastography. Multivariable regression examined relationships between PA at presentation, 24 hours, and the change (δ) in PA between presentation and 24 hours with development of VTE. RESULTS The 133 patients were severely injured (median Injury Severity Score, 25), and 14% developed VTE (all >48 hours after admission). At presentation, platelet count and PA were not significantly different between those with and without incident VTE. However, at 24 hours, those who subsequently developed VTE had significantly lower platelet counts (126 × 109/L vs. 164 × 109/L, p = 0.01) and lower PA in response to ADP (p View on Web

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Sapovirus infections in an Australian community-based healthy birth cohort during the first 2-years of life

alexandrossfakianakis shared this article with you from Inoreader Sapovirus infections in an Australian community-based healthy birth cohort during the first 2-years of life via Clinical Infectious Diseases Advance Access Abstract Background Sapovirus is an important cause of acute gastroenteritis (AGE) in young children. However, knowledge gaps remain in community settings. We investigated the epidemiology, disease characteristics and healthcare use associated with sapovirus infections in Australian children during their first 2-years of life. Methods Children in the Brisbane-based Observational Research in Childhood Infectious Diseases birth cohort provided daily gastrointestin al symptoms (vomiting/loose stools), weekly stool swabs, and healthcare data until age 2-years. Swabs were batch-tested for sapovirus using real-time polymerase chain reaction assays. Incidence rates and estimates of associations were calculated. Results Overall, 158 children returned 11,124 swabs. There were 192 sapovirus infection episodes. The incidence rate (IR) in the first 2-years of life was 0.89 episodes per child-year (95% confidence interval [CI] 0.76–1.05), the symptomatic IR was 0.26 episodes per child-year (95%CI 0.17–0.37). Age ≥6-months, the fall season and childcare attendance, increased disease incidence significantly. Fifty-four (30%) of the 180 infections with linked symptom diaries were symptomatic, with 72% recording vomiting and 48% diarrhea. Prior infection reduced risk of further infections (adjusted hazard risk 0.70; 95%CI 0.54–0.81) in the study period. Viral loads were higher and viral shedding duration was longer in symptomatic than asymp tomatic children. Twenty-three (43%) symptomatic episodes required healthcare, including six emergency department presentations and two hospitalizations. Conclusion Sapovirus infections are common in Australian children aged 6–23 months. Efforts to reduce childhood AGE after the global rollout of rotavirus vaccines should include sapovirus where estimates of its incidence in communities will be crucial. View on Web

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Histological features associated with Human Monkeypox Virus Infection in 2022 outbreak in a non-endemic country

alexandrossfakianakis shared this article with you from Inoreader Histological features associated with Human Monkeypox Virus Infection in 2022 outbreak in a non-endemic country via Clinical Infectious Diseases Advance Access Abstract Skin histology of papule and pustules from 5 MSM patients with Monkeypox infection showed viral intracytoplasmic cytopathic changes, interface dermatitis, marked inflammatory dermic infiltrate including superficial neutrophils and deep lymphocytes perivascular and periadnexal. Histologic description of Monkeypox lesions improves our understanding about clinical presentations and may have some therapeutic implications. View on Web

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New perspectives for prosthetic valve endocarditis - impact of molecular imaging by FISHseq diagnostics

alexandrossfakianakis shared this article with you from Inoreader New perspectives for prosthetic valve endocarditis - impact of molecular imaging by FISHseq diagnostics via Clinical Infectious Diseases Advance Access Abstract BackgroundThe causative microbial etiology of prosthetic valve infective endocarditis (PVE) can be difficult to identify. Our aim was to investigate the benefit of the molecular imaging technique fluorescence in situ hybridization (FISH) combined with 16S rRNA-gene PCR and sequencing (FISHseq) for the analysis of infected prosthetic heart valves. Methods We retrospectively evaluated the diagnostic outcome of 113 prosthetic valves from 105 patients with suspected PVE, treated in the years 2003-2013 in the Department of Cardiac Surgery, Charité University Medicine Berlin. Each prosthetic valve underwent cultural diagnostics and was routinely examined by FISH combined with 16S rRNA-gene PCR and sequencing. We compared classical microbiological culture outcomes (blood and valve cultures) with FISHseq results and evaluated the diagnostic impact of the molecular imaging technique. Results Conventional microbiological diagnostic alone turned out to be insufficient, as 67% of p reoperative blood cultures were non-informative (negative, inconclusive or not obtained) and 67% valve cultures remained negative. FISHseq improved the conventional cultural diagnostic methods in PVE in 30% of the cases and increased diagnostic accuracy. Out of the valve culture-negative PVE cases, FISHseq succeeded to identify the causative pathogen in 35%. Conclusions FISHseq improves PVE diagnostics, complementing the conventional cultural methods. In addition to species identification, FISH provides information about the severity of PVE and state of the pathogens, e.g. stage of biofilm formation, activity and localization on and within the prosthetic material. As a molecular imaging technique, FISHseq enables the unambiguous discrimination of skin flora as contaminant or infectious agent. View on Web

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Recurrence of symptoms following cryptococcal meningitis - characterizing a diagnostic conundrum with multiple etiologies

alexandrossfakianakis shared this article with you from Inoreader Recurrence of symptoms following cryptococcal meningitis - characterizing a diagnostic conundrum with multiple etiologies via Clinical Infectious Diseases Advance Access Abstract Background Cryptococcal meningitis is a common cause of AIDS-related mortality. Although symptom recurrence after initial treatment is common, the etiology is often difficult to decipher. We sought to summarize characteristics, etiologies and outcomes among persons with second-episode symptomatic recurrence. Methods We prospectively enrolled Ugandans with cryptococcal meningitis and obtained patient characteristics, ART and cryptococcosis histories, clinical outcomes, and CSF analysis results. We independently adjudicated cases of second-episode meningitis to categorize patients as 1: microbiological relapse, 2: paradoxical Immune Reconstitution Inflammatory Syndrome (IRIS), 3: persistent elevated intracranial pressure (ICP) only, or 4: persistent symptoms only; along with controls of primary cryptococcal meningitis. We compared groups with chi-square or Kruskal Wallis tests as appropriate. Results 724 participants wer e included (n = 607 primary episode, n = 81 relapse, n = 28 paradoxical IRIS, n = 2 persistently elevated ICP, n = 6 persistent symptoms). Participants with culture-positive relapse had lower CD4 (25 cells/mcL, IQR 9-76) and lower CSF WBC (4 cells/mcL, IQR 4-85) counts than paradoxical IRIS (CD4 78 cells/mcL, IQR 47-142 and WBC 45 cells/mcL, IQR 8-128). Among those with CSF WBC <5 cells/mcL, 86% (43/50) had relapse. Among those with CD4 counts < 50 cells/mcL, 91% (39/43) had relapse. 18-week mortality (from current symptom onset) was 47% among first episodes of cryptococcal meningitis, 31% in culture-positive relapses, and 14% in paradoxical IRIS. Conclusions Poor immune reconstitution was noted more often in relapse compared to IRIS as evidenced by lower CSF WBC counts and blood CD4 counts. These easily obtained lab values should prompt initiation of antifungal treatment while awaiting culture results. View on Web

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Post‐COVID‐19 vaccination arm pain diagnosed as complex regional pain syndrome: a case report

alexandrossfakianakis shared this article with you from Inoreader Post‐COVID‐19 vaccination arm pain diagnosed as complex regional pain syndrome: a case report via Pain Practice Abstract As the vaccination efforts against the coronavirus disease-2019 (COVID-19) continue, more patients are likely to present with complications related to COVID-19 vaccination. We describe the first reported case of complex regional pain syndrome (CRPS), involving the upper extremities, that occurred after COVID-19 vaccination. The patient presented with acute-onset severe arm pain and swelling following vaccine administration. Based on the clinical, electrodiagnostic, and radionuclide three-phase bone scan findings, the patient was diagnosed with postvaccination CRPS. The COVID-19 vaccine possibly elicited an immune-mediated inflammatory response to the injected antigen in the patient, who was predisposed to CRPS due to inflammatory immunity. The COVID-19 vaccine elicited an immune-mediated inflammatory response to the injected antigen, resulting in CRPS following COVID-19 vaccination. View on Web

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Total calcium, dairy foods and risk of colorectal cancer: a prospective cohort study of younger US women

alexandrossfakianakis shared this article with you from Inoreader Total calcium, dairy foods and risk of colorectal cancer: a prospective cohort study of younger US women via International Journal of Epidemiology - Advance Access Abstract Background Although colorectal cancer (CRC) incidence is declining among adults aged ≥65 years, CRC incidence in younger adults has been rising. The protective role of calcium in colorectal carcinogenesis has been well established, but evidence is lacking on whether the association varies by age at diagnosis. We investigated the association between total calcium intake and risk of overall CRC and CRC before age 55 years. Methods In the Nurses' Health Study II (1991–2015), 94 205 women aged 25–42 years at baseline were included in the analysis. Diet was assessed every 4 years through validated food frequency questionnaires. Multivariable-adjusted hazard ratios (HRs) and 95% CIs for CRC were estimated using the Cox proportional hazards model. Results We documented 349 incident CRC cases during 2 202 604 person-years of follow-up. Higher total calcium intake was associated with a reduced risk of CRC. Compared with those with <750 mg/day of total calcium intake, the HR of CRC was 0.61 (95% CI, 0.38–0.97) for those who consumed ≥1500 mg/day (P for trend = 0.01). The HR per 300 mg/day increase was 0.85 (95% CI, 0.76–0.95). There was a suggestive inverse association between total calcium intake and CRC before age 55 years (HR per 300 mg/day increase, 0.87; 95% CI, 0.75–1.00), suggesting the importance of calcium intake in the younger population. Conclusions In a cohort of younger women, which reflects the birth cohorts, time periods and age ranges paralleling the recent rise in CRC, higher calcium intake was associated with a decreased risk of CRC. View on Web

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