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1.
There has not been as much success in the prevention and treatment of invasive fungal infections, particularly aspergillosis, compared to the prevention and treatment of cytomegalovirus infection and graft-versus-host disease in bone marrow transplant (BMT) recipients. Allogeneic BMT recipients who develop graft-versus-host disease and remain immunosuppressed for long periods are at major risk for development of these infections. Prevention of environmental exposure, antifungal chemoprophylaxis, and attempts at early diagnosis are essential for the reduction of mortality from invasive fungal infections. Chest computerized axial tomography is extremely useful in diagnosing pulmonary aspergillosis. However, microbiologic or histologic identification of infection remains essential. Unfortunately, the response to therapy in BMT recipients remains suboptimal. With the development of the lipid formulations of amphotericin B, the newer azoles, and the echinocandins, safer and more efficacious options have become available. The optimal use of antifungal agents or their combinations remains to be determined.  相似文献   

2.
Ochs  L; Shu  XO; Miller  J; Enright  H; Wagner  J; Filipovich  A; Miller  W; Weisdorf  D 《Blood》1995,86(10):3979-3986
Infectious complications are a major cause of morbidity and mortality after allogeneic bone marrow transplantation (BMT). We have evaluated the incidence of late infections (beyond day +50) in recipients of related (RD) and unrelated donor (URD) allogeneic BMT, factors associated with increased risks of infection, and the impact of the late infections on survival. Between 1989 and 1991, 249 patients received an RD (n = 151) or URD (n = 98) allogeneic BMT at the University of Minnesota and all late infections were investigated. Three hundred sixty-seven late infectious events developed in 162 patients between 50 days and 2 years after BMT. The incidence of any late infection was greater in URD versus RD recipients (84.7% v 68.2%, respectively; P = .009). In multivariate analysis, advanced graft- versus-host disease (GVHD) was significantly associated with late infections. The effect of GVHD was apparent only in RD recipients (relative risk [RR], 2.29; P = .003), whereas URD recipients, with or without GVHD, had more late infections compared with RD recipients without GVHD. Multivariate analysis showed that late posttransplantation infections were the dominant independent factor associated with increased nonrelapse mortality (RR, 5.5; P = .0001), resulting in improved 3-year survival for RD versus URD recipients (49.9% +/- 8% v 34.4% +/- 10%; P = .004). In this study, we observed that late infections are more frequent in URD recipients, resulting in substantially higher nonrelapse mortality. This prolonged period of increased infectious risk in URD recipients suggests the need for aggressive surveillance and therapy of late infections and perhaps prolonged antibiotic prophylaxis for all URD BMT recipients.  相似文献   

3.
PCR-based preemptive therapy with ganciclovir has been shown to reduce the incidence of CMV disease after BMT. Failures of this treatment strategy are CMV disease and secondary non-viral infections. Eighty-six consecutive patients at high risk for CMV disease who received PCR-based preemptive therapy with ganciclovir were assessed for treatment failures and possible risk factors. Ganciclovir was initiated in 57 of 86 patients (66%). Only 28 of 86 (32%) patients received 4 or more weeks of ganciclovir. Recurrence of CMV infection after successful treatment was more frequent among recipients of a BMT from an unrelated compared to a sibling donor (P = 0.004). Three (3.5%) patients developed non-fatal early onset CMV disease and seven of 68 (10.3 %) late onset CMV disease (>100 days post transplant). Risk factors for late onset CMV disease were cGVHD (P = 0.0017) and duration of prior antiviral therapy >4 weeks (P = 0. 0073). The incidence of secondary non-viral infections was 28% with the duration of antiviral treatment being a significant risk factor for secondary bacterial (P = 0.0045) and invasive fungal infections (P = 0.006). Thus, PCR-based preemptive treatment with ganciclovir reduces early onset CMV disease, but the duration of antiviral therapy prior to day +100 is a significant risk factor for late onset CMV disease as well as secondary non-viral infections.  相似文献   

4.
We studied amphotericin B (AMB) serum levels (n = 590) in 41 pediatric patients, who underwent allogeneic (21) or autologous (20) bone marrow transplantation (BMT). All patients received AMB orally as part of a total gut decontamination; 30/41 patients (73%) had AMB i.v. either for prophylaxis or therapy of fungal infections. Rapid initial dose escalation of AMB and the infusion over 1 h only were well tolerated by the children. Serum level monitoring allowed AMB long-term treatment safely to be administered in children suffering from transplantation-related complications (veno-occlusive disease of the liver, graft-versus-host disease of the liver). An h.p.l.c. method was used for monitoring AMB serum trough levels to avoid levels exceeding 2 mg/l. One lethal fungal infection was observed in 41 pediatric BMT recipients (2.4%). Rapidly increasing doses of AMB at start of therapy and drug monitoring by h.p.l.c. might help to reduce fungal mortality and renal toxicity by a dose sparing effect in BMT recipients.  相似文献   

5.
Adenoviruses are increasingly recognized pathogens that affect blood and marrow transplant (BMT) recipients. Experiences with 2889 adult BMT recipients were reviewed to study the incidence, clinical spectrum, risk factors for dissemination, response to therapy, and outcome of adenovirus infections. Eight-five patients (3%) were diagnosed by means of culture (n=85) or culture and histopathological examination (n=6). Nine patients had asymptomatic viruria, and 76 had symptomatic infections, which included upper respiratory tract infection (n=20), enteritis (n=18), hemorrhagic cystitis (n=10), pneumonia (n=15), and disseminated disease (n=13). The overall mortality rate was 26%. A higher mortality rate was observed among patients with pneumonia (73%) and disseminated disease (61%). Risk factors for dissemination included receipt of an allogeneic transplant, presence of graft-versus-host disease (GVHD), and receipt of concurrent immunosuppressive therapy. Intravenous ribavirin was not associated with an appreciable benefit among 12 patients who received this treatment. In conclusion, adenovirus infections are an important cause of morbidity and mortality in adult BMT recipients, particularly allogeneic transplant recipients with GVHD who are receiving immunosuppressive therapy. The need for an effective, nontoxic antiviral therapy is apparent.  相似文献   

6.
A consecutive series of 3044 patients who underwent BMT at the University of Minnesota over a 25 year period were reviewed for the post-transplant occurrence of infection caused by the yeast Malassezia furfur. Six patients, ranging in age from 1 to 54 years, developed Malassezia infections at a median of 59 days post transplant. Five patients were allogeneic transplant recipients; the remaining patient had undergone autologous transplantation. A spectrum of clinical manifestations of Malassezia infection was seen in these patients, including infections of mucosal surfaces and the skin, in addition to catheter-related fungemia. Unlike many of the other more common opportunistic fungal infections in immunocompromised patients, neutropenia and the use of broad-spectrum antimicrobials do not appear to be significant risk factors for Malassezia infections in the BMT population. In addition, disseminated fungal infection despite the presence of fungemia is uncommon. Lastly, the outcome of Malassezia infections in these patients, whether folliculitis, mucosal infection, or fungemia, appears to be quite favorable, in contrast to the poorer outcome with many other fungal infections in BMT patients. Catheter removal and discontinuation of intravenous lipids are important for a successful outcome in fungemic cases.  相似文献   

7.
Preventing opportunistic infections in bone marrow transplant recipients   总被引:1,自引:0,他引:1  
In 1996, a Center for Disease Control and Prevention (CDC)-sponsored working group began developing guidelines for preventing opportunistic infections (OIs) in bone marrow transplant (BMT) recipients. The purposes of the guidelines are to: a) summarize current data regarding the epidemiology of OIs in BMT recipients; b) produce an evidence-based statement of recommended strategies for preventing OIs in BMT recipients; c) decrease the incidence, morbidity, and mortality of OIs in BMT recipients; and d) define directions for future OI prevention research. Each recommendation is given two ratings: one indicating the strength of the recommendation, and another indicating the strength of evidence supporting the recommendation. The target audience for the guidelines includes transplant and infectious disease physicians and BMT unit and clinic staff. The BMT OI guidelines include sections on viral, bacterial, fungal, protozoal, and helminth infections, immunization, infection control, and blood and stem cell safety. The disease-specific sections address preventing exposure and disease among both adult and pediatric recipients of allogeneic and autologous BMTs. The immunization section addresses: a) immunization of BMT recipients, their household contacts, and health care workers; b) travel immunizations for BMT recipients; and c) passive immunization with immune globulin products. The infection control sections address room ventilation, isolation and barrier precautions, and prevention of nosocomial and other infections (e.g. infections acquired from visitors, plants, food, pets, construction sites, etc.). The blood safety section contains recommendations on preventing transmission of infections to BMT recipients from infected donated cells. After the guidelines are made available for public comment, they will be finalized and published in the Morbidity and Mortality Weekly Report and placed on the CDC web site ( Note Presented in part at the First World Congress of Transplant Infectious Disease, 1–4 April 1998, Orlando, Florida.
).  相似文献   

8.
Invasive mold infections in allogeneic bone marrow transplant recipients.   总被引:12,自引:0,他引:12  
Invasive mold infections (IMIs) are an important cause of morbidity and mortality in patients who are undergoing bone marrow transplantation (BMT). To examine the epidemiology, risk factors, and outcome of IMIs in allogeneic BMT recipients, all cases of mold infection among 94 adult patients who underwent allogeneic BMT at this institution from 1 January 1997 through 31 December 1998 were reviewed retrospectively. Fifteen cases of IMI were identified; infection occurred a median of 102 days after BMT. Aspergillus species was the most common cause of disease, and species other than Aspergillus fumigatus were present in 53% of patients. By multivariate analysis, the variable associated with infection risk was systemic glucocorticosteroid use. Prophylactic antifungal therapy that was targeted to high-risk patients had little effect on disease incidence. These observations suggest that early identification of high-risk patients and better approaches to prevention should be explored, to reduce incidence and severity of disease in this population.  相似文献   

9.
Morbidity and mortality in patients with malignancies, especially leukemia and lymphoma, are increased by invasive fungal infections. Since diagnosis of invasive fungal infection is often delayed, antifungal prophylaxis is an attractive approach for patients expecting prolonged neutropenia. Antifungal prophylaxis has obviously attracted much interest resulting in dozens of clinical trials since the late 1970s. The non-absorbable polyenes are probably ineffective in preventing invasive fungal infections, but may reduce superficial mycoses. Intravenous amphotericin B and the newer azoles were used in clinical trials, but their role in antifungal prophylaxis is still not well defined. Allogeneic stem cell transplant recipients are at particularly high risk for invasive fungal infections. Other well described risk factors are neutropenia >10 days, corticosteroid therapy, sustained immunosuppression, graft versus host disease, and concomitant viral infections. The enormous study efforts are contrasted by a scarcity of risk stratified evidence based recommendations for clinical decision making. The objective of this review accumulating information on about 10.000 patients is to assess evidence based criteria primarily regarding the efficacy of antifungal prophylaxis in neutropenic cancer patients.  相似文献   

10.
The risk of recurrence or progression of prior invasive fungal infection, predominantly due to molds, is 11-33% during subsequent stem cell transplantations or myelosuppressive chemotherapy, with a high mortality. Risk factors at the time of transplant include active infection and having received <6 weeks of antifungal therapy, while after transplant prolonged neutropenia and graft-versus-host disease requiring aggressive immunosuppression are important. The use of peripheral blood stem cells has been associated with a lower risk. Minimal data are available regarding the role of preventative strategies such as surgical resection of pulmonary lesions and prophylactic granulocyte transfusions during neutropenia, the optimal duration of antifungal prophylaxis, and the appropriate monitoring strategy. This article critically evaluates these issues and provides recommendations for the secondary prophylaxis of invasive mold infections.  相似文献   

11.
Patients undergoing bone marrow transplantation are susceptible to many different bacterial, fungal and viral infections. Among the viral pathogens, cytomegalovirus (CMV), Epstein-Barr virus (EBV), and adenovirus cause the greatest morbidity and mortality and have been the most common infectious causes of death following the grafting of allogeneic marrow. This great susceptibility to viral infections is due to the immunodeficiency in cellular and humoral immune responses lasting for months to years. Contributing factors are high-dose chemo/radiotherapy, graft-versus-host disease (GVHD) prophylaxis/treatment, GVHD itself, the degree of HLA disparity between donor and recipient and the underlying disease. Defects of T cell helper and cytotoxic functions contribute to the great incidence of viral infections. We described here the kinetic of immunological reconstituion and the role of T cell immunodeficiency. At day 30 to 40 after BMT, a minority of patients had recovery of virus-specific CD8+ T-cell response. Between day 40 and day 90 recovery of deficient CD8+ and CD4+ T cell responses occured in the majority of the recipients of HLA identical BMT but only in the minority of the recipients of HLA partially incompatible BMT. New approaches should therefore be envisaged either to preserve donor T-cell-mediate immunity or tho accelerate immune reconstitution. Add-back of unmanipulated T-cells, or virus-specific T cells could improve antimicrobial defenses after BMT.
Déficit de limmunité antivirale : EBV, CMV, adénovirus
  相似文献   

12.
Summary The incidence of invasive fungal infections after bone marrow transplantation (BMT) was analyzed in 303 consecutive marrow graft recipients (allogeneicn=271, autologousn=27, syngeneicn=5). All patients received inhalations with amphotericin B (10 mg twice daily) during neutropenia. The overall incidence of invasive fungal infections within the first 120 days after transplant was 3.6% (11/303; aspergillosis: 6; yeast infection: 5). Four of the 11 cases occurred early, and seven cases were observed after neutrophil recovery and discontinuation of amphotericin B inhalation treatment. Late infection was significantly associated with the development of acute graft-versus-host disease. Four of the 11 infections (early 2/4; late: 2/7) were observed in patients with a history of previous fungal infection. Other patient and treatment characteristics were not helpful in defining potential risk factors. In particular, the incidence of invasive fungal infections did not differ between patients with more or less strict reverse isolation measures. Occasional side effects such as initial mild cough and bad taste were rare, usually disappeared during continued administration, and were in no case the reason for discontinuation of treatment. These data suggest that aerosolized amphotericin B may be a useful, convenient, and efficient prophylactic antifungal regimen in BMT.  相似文献   

13.
Abstract: Invasive zygomycosis is a devastating fungal infection occurring as an opportunistic infection after bone marrow transplantation (BMT). Sinusitis can lead to fungal infection in immunosuppressed patients, and cavernous sinus thrombosis, an uncommon condition in immunocompetent patients, typically follows an infection involving the medial third of the face, nose, or paranasal sinuses. Patients undergoing unrelated-donor BMT (UD-BMT) are prone to develop life-threatening infections because of poor recovery of cellular immunity. Despite adequate clinical evaluation and treatment, the prognosis of patients with invasive fungal infections is dismal, especially when intracerebral structures are affected. We describe a case of a patient who underwent an UD-BMT and developed cavernous sinus thrombosis after sinusitis due to zygomycosis. Moreover, he also had disseminated fungal ( Zygomycetes and Aspergillus ) and viral (cytomegalovirus and adenovirus) infections.  相似文献   

14.
PURPOSE OF REVIEW: For pancreas, liver, and hematopoietic stem cell transplant recipients, no antifungal prophylaxis led to a high rate of and high morbidity from fungal infection. With the use of fluconazole as prophylaxis since the early 1990s, there have been shifts in the types of infecting fungal pathogens, documentation of resistance among fungal organisms, and changes in transplant practices. The aim of this article is to review recent clinical trials regarding antifungal chemoprophylaxis among several populations of high risk patients. RECENT FINDINGS: Itraconazole, micafungin, and posaconazole have been studied as alternatives to fluconazole prophylaxis. Itraconazole showed no dramatic improvement over fluconazole as prophylaxis during liver and hematopoietic stem cell transplantation, primarily due to gastrointestinal side effects. In addition, detrimental changes to cyclophosphamide metabolism were noted for hematopoietic stem cell transplant recipients. Micafungin was superior to fluconazole during the pre-engraftment period of hematopoietic stem cell transplantation, because it was able to prevent mold infections, required less switches to empirical antifungal therapy, and functioned as well as fluconazole in preventing yeast infections. Posaconazole was compared to fluconazole during a 16-week prophylaxis period during graft-versus-host disease, but results of this study are still forthcoming. Aerosolized amphotericin products appear to be safe for lung transplant recipients. SUMMARY: Fluconazole remains the standard agent for prophylaxis against invasive fungal infections for pancreas, liver, and hematopoietic stem cell transplant recipients. Micafungin is superior to fluconazole with minimal toxicity for use in the pre-engraftment period of hematopoietic stem cell transplantation. The optimal agent for prophylaxis later following transplant, if mold coverage is desired during prolonged immunosuppression, has not been determined.  相似文献   

15.
Bone marrow transplant (BMT) recipients are prone to bacterial, viral and fungal infections. Mycobacterium tuberculosis infection can occur in these patients, but the incidence is lower than that of other infections. This report describes four patients with Mycobacterium tuberculosis infection identified from 641 adult patients who received a BMT over a 12-year period (prevalence 0.6%). The pre-transplant diagnosis was AML in two patients and CML in the other two. Pre-transplant conditioning consisted of BU/CY in three patients and CY/TBI in one. Graft-versus-host disease (GVHD) prophylaxis was MTX/CsA in three patients and T cell depletion of the graft in one patient. Sites of infection were lung (two), spine (one) and central nervous system (one). Onset of infection ranged from 120 days to 20 months post BMT. Two patients had co-existing CMV infection. One patient had graft failure. The two patients who received anti-tuberculous (TB) therapy recovered from the infection. Although the incidence of tuberculosis in BMT patients is not as high as in patients with solid organ transplants, late diagnosis due to the slow growth of the bacterium can lead to delay in instituting anti-TB therapy. A high index of suspicion should be maintained, particularly in endemic areas.  相似文献   

16.
Particular human papillomavirus (HPV) subtypes are implicated in the genesis of abnormal cervical cytology and cervical cancer. While most immunocompetent hosts clear HPV infection with no sequelae, some develop premalignant cytological changes of whom a minority subsequently progress to overt carcinoma. Immunocompromised patients, such as renal allograft recipients and HIV-infected individuals, have a higher rate of cytological abnormalities. This is thought to be due to prolonged persistence of virus due to impaired clearance by the immune system. We undertook a retrospective review of the cervical cytology of all women who underwent BMT at two transplant centres and who had cervical smears performed between 1990 and 1998. The rate of cytological abnormalities was significantly higher than in the general population before BMT (age-adjusted odds ratio (OR) 2.2, P = 0.02) and after BMT (OR 7.0, P < 0.0001). After BMT, allogeneic recipients had a higher rate of abnormalities than did autologous patients (OR 2.6, P = 0.02) although only allogeneic recipients had a higher rate of abnormalities post-BMT compared to pre-BMT (allogeneic OR 6.8, P = 0.004). These observations suggest that pre-transplant disease and treatment factors increase the risk of cytologic abnormalities and that transplant-related factors such as conditioning therapy and immunosuppression further increase this risk. These data suggest that more frequent screening may be required in these at-risk groups, especially allogeneic recipients. Prospective studies are required to further evaluate cytological abnormalities and HPV shedding in these populations.  相似文献   

17.
Lung transplant is a potential life-saving procedure for chronic lung diseases. Lung transplant recipients (LTRs) are at the greatest risk for invasive fungal infections (IFIs) among solid organ transplant (SOT) recipients because the allograft is directly exposed to fungi in the environment, airway and lung host defenses are impaired, and immunosuppressive regimens are particularly intense. IFIs occur within a year of transplant in 3–19% of LTRs, and they are associated with high mortality, prolonged hospital stays, and excess healthcare costs. The most common causes of post-LT IFIs are Aspergillus and Candida spp.; less common pathogens are Mucorales, other non-Aspergillus moulds, Cryptococcus neoformans, Pneumocystis jirovecii, and endemic mycoses. The majority of IFIs occur in the first year following transplant, although later onset is observed with prolonged antifungal prophylaxis. The most common manifestations of invasive mould infections (IMIs) include tracheobronchial (particularly at anastomotic sites), pulmonary and disseminated infections. The mortality rate of tracheobronchitis is typically low, but local complications such as bronchomalacia, stenosis and dehiscence may occur. Mortality rates associated with lung and disseminated infections can exceed 40% and 80%, respectively. IMI risk factors include mould colonization, single lung transplant and augmented immunosuppression. Candidiasis is less common than mould infections, and manifests as bloodstream or other non-pulmonary invasive candidiasis; tracheobronchial infections are encountered uncommonly. Risk factors for and outcomes of candidiasis are similar to those of non lung transplant recipients. There is evidence that IFIs and fungal colonization are risk factors for allograft failure due to chronic rejection. Mould-active azoles are frontline agents for treatment of IMIs, with local debridement as needed for tracheobronchial disease. Echinocandins and azoles are treatments for invasive candidiasis, in keeping with guidelines in other patient populations. Antifungal prophylaxis is commonly administered, but benefits and optimal regimens are not defined. Universal mould-active azole prophylaxis is used most often. Other approaches include targeted prophylaxis of high-risk LTRs or pre-emptive therapy based on culture or galactomannan (GM) (or other biomarker) results. Prophylaxis trials are needed, but difficult to perform due to heterogeneity in local epidemiology of IFIs and standard LT practices. The key to devising rational strategies for preventing IFIs is to understand local epidemiology in context of institutional clinical practices.  相似文献   

18.
Two randomized, placebo-controlled trials previously showed that fluconazole (400 mg/d) administered prophylactically decreases the incidence of candidiasis in blood and marrow transplant (BMT) recipients. However, there exists conflicting data regarding the optimal duration of fluconazole administration, specifically whether prophylaxis through acute graft-versus-host disease (GVHD) results in improved survival in allograft recipients. Reported here are the results of long-term follow-up and a detailed analysis of invasive candidiasis and candidiasis-related death in 300 patients who received fluconazole (400 mg/d) or placebo for 75 days after BMT at the Fred Hutchinson Cancer Research Center. Patients in both treatment arms were compared for survival, causes of death, and the incidence of invasive fungal infections early (less than 110 days) and late (more than 110 days) after BMT. After 8 years of follow-up, survival is significantly better in fluconazole recipients compared with placebo recipients (68 of 152 vs 41 of 148, P =.0001). The overall incidence of invasive candidiasis was increased in patients who received placebo compared with fluconazole (30 of 148 vs 4 of 152, P <.001). More patients who received placebo died with candidiasis early (13 of 148 vs 1 of 152, P =.001) and late (8 of 96 vs 1 of 121, P =.0068) after BMT. The incidence of severe GVHD involving the gut was higher in patients who did not receive fluconazole (20 of 143 vs 8 of 145, P =.02), and fewer patients who received fluconazole died with this complication. Thus, administration of fluconazole (400 mg/d) for 75 days after BMT appears to be associated with decreased gut GVHD, a persistent protection against disseminated candidal infections and candidiasis-related death, resulting in an overall survival benefit in allogeneic BMT recipients.  相似文献   

19.
Patients with liver cirrhosis are susceptible to infections due to various mechanisms, including abnormalities of humoral and cell-mediated immunity and occurrence of bacterial translocation from the intestine. Bacterial infections are common and represent a reason for progression to liver failure and increased mortality. Fungal infections, mainly caused by Candida spp., are often associated to delayed diagnosis and high mortality rates. High level of suspicion along with prompt diagnosis and treatment of infections are warranted. Bacterial and fungal infections negatively affect the outcomes of liver transplant candidates and recipients, causing disease progression among patients on the waiting list and increasing mortality, especially in the early posttransplant period. Abdominal, biliary tract, and bloodstream infections caused by Gram-negative bacteria [e.g., Enterobacteriaceae and Pseudomonas aeruginosa(P. aeruginosa)] and Staphylococcus spp. are commonly encountered in liver transplant recipients. Due to frequent exposure to broad-spectrum antibiotics, invasive procedures, and prolonged hospitalizations, these patients are especially at risk of developing infections caused by multidrug resistant bacteria. The increase in antimicrobial resistance hampers the choice of an adequate empiric therapy and warrants the knowledge of the local microbial epidemiology and the implementation of infection control measures. The main characteristics and the management of bacterial and fungal infections in patients with liver cirrhosis and liver transplant recipients are presented.  相似文献   

20.
Fungal infections are common in solid organ transplantation. An increasing number of transplant recipients receive antifungal therapy for prolonged duration owing to invasive fungal infections. Herein, we describe a diagnosis of periostitis as a complication of chronic use of voriconazole in a lung transplant recipient. The patient was diagnosed with probable pulmonary aspergillosis and was treated with oral voriconazole for a total of 9 months. Evidence of multifocal periostitis was observed in the axial and appendicular skeleton. Early recognition of this phenomenon is important to prevent unnecessary tests and procedures. Prompt discontinuation of voriconazole should result in improvement of symptoms.  相似文献   

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