Infection among renal transplant patients in the Kingdom of Bahrain: A ten year retrospective study ( 2004-2014)

Introduction:  Kidney transplantation is the process of transplanting the organ to a patient with end stage renal disease. Complications with transplant can be encountered during or for a varying period post operatively. As graft survival and immunosuppressant regimens have improved, infection of grafts have become a leading concern. The diagnosis of infection in such patients is challenging too due to the lack of the typical infection indicators like fever as the patients are immunocompromised. The focus of our study is to study the extent of infection on the transplanted patients. The research will look into the type of microorganisms encountered, their management and outcome. Methods  & Materials: A retrospective study was carried out between the periods of 1st of January 2004 to 31st of December of the same year 2014. All renal transplant patients admitted during this period were segregated according to the reason of admission. Only those with impression of infection were enrolled.   Results: A total of 108 patients admitted between the period of 1st of January 2004 and 31st of December 2014 with impression of infection post renal transplant. Some of the patients had recurrent history during those ten years for infectious purposes. From the 108 patients, 74 of them received transplant from living donors (68.52%). The diagnosis on admission was limited to certain differentials. 35.19% patients were admitted with the impression of urinary tract infection. Pneumonia was diagnosed in 10.19%.  patients.  Majority of patient (89.96%) were on maintenance dose of steroids. That was followed by MMF, Tacrolimus and cyclosporine with a percentage of 81.48%, 46.3% and 25.93% respectively. Regarding the antibiotics, 86.11% of the admitted patient were started on single antibiotic on admission including those with recurrent admission. Conclusion: Fever is a common presenting symptom in our population of transplant recipients which reflects the possibility of infection. The majority responded to a single antibiotic use.  The limitation of our study is the small number of the transplanted patients. &nbsp

Fortunella margarita Transcriptional Reprogramming Triggered by Xanthomonas citri subsp. citri

<p>Abstract</p> <p>Background</p> <p>Citrus canker disease caused by the bacterial pathogen <it>Xanthomonas citri </it>subsp. <it>citri (</it>Xcc) <it>has </it>become endemic in areas where high temperature, rain, humidity, and windy conditions provide a favourable environment for the dissemination of the bacterium. Xcc is pathogenic on many commercial citrus varieties but appears to elicit an incompatible reaction on the citrus relative <it>Fortunella margarita </it>Swing (kumquat), in the form of a very distinct delayed necrotic response. We have developed subtractive libraries enriched in sequences expressed in kumquat leaves during both early and late stages of the disease. The isolated differentially expressed transcripts were subsequently sequenced. Our results demonstrate how the use of microarray expression profiling can help assign roles to previously uncharacterized genes and elucidate plant pathogenesis-response related mechanisms. This can be considered to be a case study in a citrus relative where high throughput technologies were utilized to understand defence mechanisms in <it>Fortunella </it>and citrus at the molecular level.</p> <p>Results</p> <p><b>cDNAs from sequenced kumquat libraries (ESTs) made from subtracted RNA populations, healthy vs. infected, were used to make this microarray</b>. Of 2054 selected genes on a customized array, 317 were differentially expressed (P < 0.05) in Xcc challenged kumquat plants compared to mock-inoculated ones. This study identified components of the incompatible interaction such as reactive oxygen species (ROS) and programmed cell death (PCD). Common defence mechanisms and a number of resistance genes were also identified. In addition, there were a considerable number of differentially regulated genes that had no homologues in the databases. This could be an indication of either a specialized set of genes employed by kumquat in response to canker disease or new defence mechanisms in citrus.</p> <p>Conclusion</p> <p>Functional categorization of kumquat Xcc-responsive genes revealed an enhanced defence-related metabolism as well as a number of resistant response-specific genes in the kumquat transcriptome in response to Xcc inoculation. Gene expression profile(s) were analyzed to assemble a comprehensive and inclusive image of the molecular interaction in the kumquat/Xcc system. This was done in order to elucidate molecular mechanisms associated with the development of the hypersensitive response phenotype in kumquat leaves. These data will be used to perform comparisons among citrus species to evaluate means to enhance the host immune responses against bacterial diseases.</p