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https://www.readbyqxmd.com/read/28736880/central-nervous-system-infection-due-to-cryptococcus-gattii-sensu-lato-in-india-analysis-of-clinical-features-molecular-profile-and-antifungal-susceptibility
#1
Shayanki Lahiri Mukhopadhyay, Veenakumari H Bahubali, Netravathi Manjunath, Aarthi Swaminathan, Sayani Maji, Marimuthu Palaniappan, Satishchandra Parthasarathy, Nagarathna Chandrashekar
Cryptococcus gattii species complex has evolved as a pathogen in the last two decades causing infection among both immunocompetent and immunocompromised hosts. We aimed to analyse the clinical features of CNS infection caused by C. gattii sensu lato, molecular and antifungal susceptibility profile of this pathogen. Cases diagnosed to have CNS cryptococcosis were included in the study. Cryptococcus recovered from patient's specimen was identified by standard protocol. Species confirmation, mating type and molecular type determination were performed by PCR based methods...
July 23, 2017: Mycoses
https://www.readbyqxmd.com/read/28735154/accuracy-of-c-reactive-protein-as-a-bacterial-infection-marker-in-critically-immunosuppressed-patients-a-systematic-review-and-meta-analysis
#2
REVIEW
Vanessa Martins de Oliveira, Rafael Barberena Moraes, Airton Tetelbom Stein, Eliana Márcia Wendland
BACKGROUND: There is a need for a better understanding of the role of C-reactive protein (CRP) as a valid marker for the detection of bacterial infections in critically immunosuppressed patients. A high negative predictive value of CRP is also needed to rule out sepsis and bacterial infections in immunocompetent patients. However, few studies have evaluated the performance of CRP in immunocompromised hosts. The aim of the present study was to evaluate the performance of CRP as a marker of infection in critically immunosuppressed patients...
July 15, 2017: Journal of Critical Care
https://www.readbyqxmd.com/read/28727989/oral-papillomatosis-in-immunocompromised-patients-a-case-series-of-kidney-transplant-recipients-and-myelodysplastic-syndrome
#3
Eun-Jung Kwak, Yun Hee Choi, Wonse Park, Eunae Sandra Cho
Solitary papilloma is a human papillomavirus (HPV)-induced benign indolent epithelial tumor with limited growth, whereas papillomatosis is an entirely different entity. Papillomatosis requires attention because of its aggressive and recurrent clinical progress with risks of dysplastic and malignant transformation. Recurrent respiratory papillomatosis (RRP) has a high prevalence of dysplasia and reports of transformation to carcinoma-ex-papillomatosis, especially when associated with low-risk HPV type 11. Although papillomatosis seldom occurs in the oral cavity, this report describes 3 cases of oral papillomatosis in immunocompromised patients, with 1 case identified as having HPV type 11...
June 24, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28727933/genotype-specific-acquisition-evolution-and-adaptation-of-characteristic-mutations-in-hepatitis-e-virus
#4
Aqsa Ikram, Mohamad S Hakim, Jian-Hua Zhou, Wenshi Wang, Maikel P Peppelenbosch, Qiuwei Pan
Hepatitis E virus (HEV) infection is a major cause of acute hepatitis but also provokes chronic infection in immunocompromised patients. Although the pathogenesis and treatment outcome involve complex interplay between the virus and host, the nature of adaptive responses of HEV to the host immune system remain obscure at best. In this study, we employed large-scale proteomic bioinformatics to profile characteristic mutations in human HEV isolates associated to ribavirin treatment failure, chronic hepatitis, hepatic failure or altered immunoreactivity...
July 20, 2017: Virulence
https://www.readbyqxmd.com/read/28724557/the-human-virome-implications-for-clinical-practice-in-transplantation-medicine
#5
Susanna K Tan, David A Relman, Benjamin A Pinsky
Advances in DNA sequencing technology have provided an unprecedented opportunity to study the human virome. Transplant recipients and other immunocompromised hosts are at particular risk for developing virus-related pathology; thus, the impact of the virome on health and disease may be even more relevant in this population. Here we discuss technical considerations in studying the human virome, the current literature on the virome in transplant recipients, and near future applications of sequence-based findings that can further our understanding of viruses in transplantation medicine...
July 19, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28720468/production-of-a-chikungunya-vaccine-using-a-cho-cell-and-attenuated-viral-based-platform-technology
#6
Preethi Eldi, Tamara H Cooper, Liang Liu, Natalie A Prow, Kerrilyn R Diener, Paul M Howley, Andreas Suhrbier, John D Hayball
Vaccinia-based systems have been extensively explored for the development of recombinant vaccines. Herein we describe an innovative vaccinia virus (VACV)-derived vaccine platform technology termed Sementis Copenhagen Vector (SCV), which was rendered multiplication-defective by targeted deletion of the essential viral assembly gene D13L. A SCV cell substrate line was developed for SCV vaccine production by engineering CHO cells to express D13 and the VACV host-range factor CP77, because CHO cells are routinely used for manufacture of biologics...
July 15, 2017: Molecular Therapy: the Journal of the American Society of Gene Therapy
https://www.readbyqxmd.com/read/28719288/evaluation-of-the-protective-effect-of-deoxyribonucleic-acid-vaccines-encoding-granule-antigen-2-and-5-against-acute-toxoplasmosis-in-balb-c-mice
#7
Xiao Teng Ching, Mun Yik Fong, Yee Ling Lau
AbstractToxoplasma gondii infects a broad range of warm-blooded hosts, including humans. Important clinical manifestations include encephalitis in immunocompromised patients as well as miscarriage and fetal damage during early pregnancy. Toxoplasma gondii dense granule antigen 2 and 5 (GRA2 and GRA5) are essential for parasitophorous vacuole development of the parasite. To evaluate the potential of GRA2 and GRA5 as recombinant DNA vaccine candidates, these antigens were cloned into eukaryotic expression vector (pcDNA 3...
June 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28717096/disseminated-mycobacterium-scrofulaceum-infection-in-an-immunocompetent-host
#8
Yu Takemoto, Hirokazu Tokuyasu, Tomoyuki Ikeuchi, Hirofumi Nakazaki, Satoru Nakamatsu, Suguru Kakite, Keiichi Yamasaki
A 56-year-old woman, without any immunocompromising diseases, was referred to our hospital because of a recurrence of pyogenic spondylitis. Computed tomography revealed multiple osteolytic changes in the whole body. Vertebral magnetic resonance imaging revealed osteomyelitis and spondylitis. Mycobacterium scrofulaceum was detected in sputum cultures, in abscesses from the right knee, and in a subcutaneous forehead abscess. Therefore, the patient was diagnosed with disseminated Mycobacterium scrofulaceum infection...
2017: Internal Medicine
https://www.readbyqxmd.com/read/28714333/-borrelia-miyamotoi-a-recently-identified-human-pathogenic-tick-borne-relapsing-fever-spirochete
#9
Sándor Szekeres, András Lakos, Gábor Földvári
Borrelia miyamotoi is a recently described relapsing fever spirochete transmitted by ticks of the Ixodes ricinus complex. This pathogen is different from Borrelia burgdorferi sensu lato (the Lyme borreliosis spirochetes) in its epidemiology, ecology and also genetics. Over 50 patients have been described worldwide with Borrelia miyamotoi disease, and three immunocompromised patients were reported with neurological symptoms. Our knowledge about Borrelia miyamotoi infection in ticks and its distribution in different habitats and also the mechanism of the infection is limited...
July 2017: Orvosi Hetilap
https://www.readbyqxmd.com/read/28713605/diarrhea-as-a-presenting-symptom-of-disseminated-toxoplasmosis
#10
Matthew Glover, Zhouwen Tang, Robert Sealock, Shilpa Jain
Disseminated toxoplasmosis is uncommon in both immunocompetent and immunocompromised hosts with gastrointestinal involvement being rarely described. We report a case of disseminated gastrointestinal toxoplasmosis in an immunocompromised man who presented with one month of diarrhea and abdominal pain. Imaging showed thickening of the ascending colon and cecum. Esophagogastroduodenoscopy and colonoscopy biopsies revealed Toxoplasma gondii, confirmed by immunostain. Symptoms completely resolved following treatment with pyrimethamine, sulfadiazine, and leucovorin...
2017: Case Reports in Gastrointestinal Medicine
https://www.readbyqxmd.com/read/28713380/targeting-the-human-t-cell-inducible-costimulator-molecule-with-a-monoclonal-antibody-prevents-graft-vs-host-disease-and-preserves-graft-vs-leukemia-in-a-xenograft-murine-model
#11
Aude Burlion, Simon Brunel, Nicolas Y Petit, Daniel Olive, Gilles Marodon
BACKGROUND: Graft-vs-host disease (GVHD) is a major complication of allogenic bone marrow transplantation (BMT). Targeting costimulatory molecules with antagonist antibodies could dampen the excessive immune response that occurs, while preserving the beneficial graft vs leukemia (GVL) of the allogeneic response. Previous studies using a mouse model of GVHD have shown that targeting the T-cell Inducible COStimulator (ICOS, CD278) molecule is beneficial, but it is unclear whether the same applies to human cells...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28712753/diffuse-small-intestine-erosions-and-ulcers-in-an-immunocompromised-host
#12
Obaidullah Aseem, Daniel S Childs, Conor G Loftus
No abstract text is available yet for this article.
July 13, 2017: Gastroenterology
https://www.readbyqxmd.com/read/28710648/clinical-associated-characteristics-and-microbiological-features-of-bloodstream-nontyphoidal-salmonella-infection-in-adult-patients-receiving-allogeneic-hematopoietic-stem-cell-transplantation
#13
Po-Shen Ko, Yao-Chung Liu, Hao-Yuan Wang, Chia-Yun Wu, Nai-Wen Fan, Chia-Jen Liu, Yuan-Bin Yu, Liang-Tsai Hsiao, Tzeon-Jye Chiou, Cheng-Hwai Tzeng, Jin-Hwang Liu, Jyh-Pyng Gau
Bloodstream nontyphoidal salmonella (NTS) infection is rare, but its associated characteristics and microbiological features in immunocompromised patients are worth paying attention to, particularly for those receiving allogeneic hematopoietic stem cell transplantation (SCT). No studies so far have analyzed post-transplant bloodstream NTS infection. Therefore, we reviewed 423 adult patients undergoing allogeneic hematopoietic SCT from 2003 to 2014. Nine out of four hundred twenty-three patients (2.13%) developed post-transplant bloodstream NTS infection, including two patients who had subsequent or combined metastatic infections...
July 15, 2017: Annals of Hematology
https://www.readbyqxmd.com/read/28710242/pseudomonas-aeruginosa-as-an-unusual-cause-of-cavitating-lung-lesion
#14
Justin D Salciccioli, Hannah Woodcock, Mathina Darmalingam
A 31-year-old woman with systemic lupus erythematosus presented to the emergency department with cough for 1 week. Chest radiograph demonstrated cavitating lesion in the right upper zone with surrounding ground-glass change. Blood culture results from the day of hospital presentation grew Pseudomonas aeruginosa Sputum sample and pleural fluid grew P. aeruginosa and were negative for acid-fast bacilli. P. aeruginosa is a rare cause of cavitating lung lesion and has been associated with immunocompromised hosts...
July 14, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28707783/aggressive-necrotizing-pseudomonal-sinonasal-infections
#15
Edward C Kuan, Bobby A Tajudeen, Kevin C Welch, Rakesh K Chandra, Ben J Glasgow, Jeffrey D Suh
BACKGROUND: Pseudomonas aeruginosa is a gram-negative bacterium frequently implicated in recalcitrant sinonasal infections, especially in immunocompromised hosts. We report 6 cases of rapidly progressive pseudomonal acute rhinosinusitis producing tissue necrosis and, in certain cases, cranial nerve palsies. METHODS: Retrospective review of 6 patients with aggressive necrotizing sinonasal infections treated at 4 tertiary academic medical centers with sinonasal cultures growing P...
July 14, 2017: International Forum of Allergy & Rhinology
https://www.readbyqxmd.com/read/28705685/-fungal-sinusitis
#16
REVIEW
E Lafont, C Aguilar, P Vironneau, R Kania, A Alanio, S Poirée, O Lortholary, F Lanternier
Although sinusitis affects about 20 % of the population, fungal sinusitis is rare. Aspergillus sp. are most frequently implicated. Fungal sinusitis represents a wide spectrum of disorders, including acute or chronic and invasive or non-invasive forms. Invasive fungal sinusitis may develop in an immunocompromised or diabetic patient, whereas non-invasive fungal sinusitis should be considered in a chronic situation, resistant to antibiotics in immunocompetent patients. Allergic fungal sinusitis is related to hypersensitivity of the host to the fungus...
July 10, 2017: Revue des Maladies Respiratoires
https://www.readbyqxmd.com/read/28704490/the-synthetic-killer-peptide-kp-impairs-candida-albicans-biofilm-in-vitro
#17
Simona Paulone, Andrea Ardizzoni, Arianna Tavanti, Serena Piccinelli, Cosmeri Rizzato, Antonella Lupetti, Bruna Colombari, Eva Pericolini, Luciano Polonelli, Walter Magliani, Stefania Conti, Brunella Posteraro, Claudio Cermelli, Elisabetta Blasi, Samuele Peppoloni
Candida albicans is a commensal organism, commonly inhabiting mucosal surfaces of healthy individuals, as a part of the resident microbiota. However, in susceptible hosts, especially hospitalized and/or immunocompromised patients, it may cause a wide range of infections. The presence of abiotic substrates, such as central venous or urinary catheters, provides an additional niche for Candida attachment and persistence, particularly via biofilm development. Furthermore, Candida biofilm is poorly susceptible to most antifungals, including azoles...
2017: PloS One
https://www.readbyqxmd.com/read/28702856/dynamics-of-torque-teno-virus-viremia-could-predict-risk-of-complications-after-allogeneic-hematopoietic-stem-cell-transplantation
#18
Ramona Gilles, Marco Herling, Udo Holtick, Eva Heger, Sabine Awerkiew, Irina Fish, Konstantin Höller, Saleta Sierra, Elena Knops, Rolf Kaiser, Christof Scheid, Veronica Di Cristanziano
Allogeneic hematopoietic stem cell transplantation (allo-HSCT) is an established treatment option for several hematological diseases. However, the first year post-transplantation is often complicated by infections and graft-versus-host disease (GVHD). Improvements in immunological monitoring could reduce such post-transplant complications. Torque Teno virus (TTV), a chronically persisting DNA virus, is reported to be a marker for immune function in immunocompromised patients. In the present study, the TTV kinetics were analyzed to investigate the potential role of TTV viremia as immune-competence read-out after allo-HSCT...
July 12, 2017: Medical Microbiology and Immunology
https://www.readbyqxmd.com/read/28702025/cellular-and-molecular-defects-underlying-invasive-fungal-infections-revelations-from-endemic-mycoses
#19
REVIEW
Pamela P Lee, Yu-Lung Lau
The global burden of fungal diseases has been increasing, as a result of the expanding number of susceptible individuals including people living with human immunodeficiency virus (HIV), hematopoietic stem cell or organ transplant recipients, patients with malignancies or immunological conditions receiving immunosuppressive treatment, premature neonates, and the elderly. Opportunistic fungal pathogens such as Aspergillus, Candida, Cryptococcus, Rhizopus, and Pneumocystis jiroveci are distributed worldwide and constitute the majority of invasive fungal infections (IFIs)...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28698104/pseudomonas-aeruginosa-quorum-sensing-modulates-immune-responses-an-updated-review-article
#20
REVIEW
Ashraf Kariminik, Majid Baseri-Salehi, Babak Kheirkhah
Pseudomonas aeruginosa is an opportunistic bacterium which induces some complications in immunocompromised patients. Pseudomonas aeruginosa is a quorum-sensing using bacterium which regulates its genes expression. The bacterium uses two famous pathways for quorum sensing entitled LasI/LasR and RhlI/RhlR systems. It has been documented that the bacteria which use quorum sensing are able to overcome immune responses. This review article aims to present recent information regarding the effects of Pseudomonas aeruginosa quorum sensing systems on the host immune responses...
July 8, 2017: Immunology Letters
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