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https://www.readbyqxmd.com/read/29048509/plasma-but-not-cerebrospinal-fluid-interleukin-7-and-interleukin-5-levels-pre-antiretroviral-therapy-commencement-predict-cryptococcosis-associated-immune-reconstitution-inflammatory-syndrome
#1
Ngomu Akeem Akilimali, Christina C Chang, Daniel M Muema, Tarylee Reddy, Mahomed-Yunus S Moosa, Sharon R Lewin, Martyn A French, Thumbi Ndung'u
Background: Patients with human immunodeficiency virus/AIDS-associated cryptococcal meningitis (CM) frequently experience clinical deterioration, known as cryptococcosis-associated immune reconstitution inflammatory syndrome (C-IRIS), upon initiation of antiretroviral therapy (ART). The immunological mechanisms underlying C-IRIS are incompletely defined and no reliable predictive biomarkers exist. We investigated whether plasma or cerebrospinal fluid (CSF) levels of cytokines and chemokines predicted C-IRIS and are potential predictive biomarkers...
October 16, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29046746/perspectives-on-non-neoformans-cryptococcal-opportunistic-infections
#2
REVIEW
Nichole Smith, Matthew Sehring, Jefferson Chambers, Preeti Patel
Non-neoformans Cryptococcus species, including C. laurentii and C. albidus, have historically been classified as exclusively saprophytic. However, recent studies have increasingly implicated these organisms as the causative agent of opportunistic infections in humans. Herein, the case is presented of C. laurentii meningitis in a critically ill patient receiving corticosteroids. C. laurentii has been implicated in an additional 18 cases of opportunistic infection, predominantly of the skin, bloodstream, and central nervous system...
October 2017: Journal of Community Hospital Internal Medicine Perspectives
https://www.readbyqxmd.com/read/29043954/n-acetylglucosamine-affects-cryptococcus-neoformans-cell-wall-composition-and-melanin-architecture
#3
Emma Camacho, Christine Chrissian, Radames J B Cordero, Livia Liporagi-Lopes, Ruth E Stark, Arturo Casadevall
Cryptococcus neoformans is an environmental fungus that belongs to the phylum Basidiomycetes and is a major pathogen in immunocompromised patients. The ability of C. neoformans to produce melanin pigments represents its second most important virulence factor, after the presence of a polysaccharide capsule. Both the capsule and melanin are closely associated with the fungal cell wall, a complex structure that is essential for maintaining cell morphology and viability under conditions of stress. The amino sugar N-acetylglucosamine (GlcNAc) is a key constituent of the cell-wall chitin and is used for both N-linked glycosylation and GPI anchor synthesis...
October 18, 2017: Microbiology
https://www.readbyqxmd.com/read/29038249/anti-pd-1-antibody-treatment-promotes-clearance-of-persistent-cryptococcal-lung-infection-in-mice
#4
Jonathan A Roussey, Steven P Viglianti, Seagal Teitz-Tennenbaum, Michal A Olszewski, John J Osterholzer
Activation of immunomodulatory pathways in response to invasive fungi can impair clearance and promote persistent infections. The programmed cell death protein-1 (PD-1) signaling pathway inhibits immune effector responses against tumors, and immune checkpoint inhibitors that block this pathway are being increasingly used as cancer therapy. The objective of this study was to investigate whether this pathway contributes to persistent fungal infection and to determine whether anti-PD-1 Ab treatment improves fungal clearance...
October 16, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29036605/survey-of-laboratory-practices-for-diagnosis-of-fungal-infection-in-seven-asian-countries-an-asia-fungal-working-group-afwg-initiative
#5
Ariya Chindamporn, Arunaloke Chakrabarti, Ruoyu Li, Pei-Lun Sun, Ban-Hock Tan, Mitzi Chua, Retno Wahyuningsih, Atul Patel, Zhengyin Liu, Yee-Chun Chen, Methee Chayakulkeeree
An online survey of mycology laboratories in seven Asian countries was conducted to assess the status, competence, and services available. Country representatives from the Asia Fungal Working Group (AFWG) contacted as many laboratories performing mycology diagnosis as possible in their respective countries, requesting that the laboratory heads complete the online survey. In total, 241 laboratories responded, including 71 in China, 104 in India, 11 in Indonesia, 26 in the Philippines, four in Singapore, 18 in Taiwan, and seven in Thailand...
September 20, 2017: Medical Mycology: Official Publication of the International Society for Human and Animal Mycology
https://www.readbyqxmd.com/read/29033946/exploitation-of-scavenger-receptor-macrophage-receptor-with-collagenous-structure-by-cryptococcus-neoformans-promotes-alternative-activation-of-pulmonary-lymph-node-cd11b-conventional-dendritic-cells-and-non-protective-th2-bias
#6
Jintao Xu, Adam Flaczyk, Lori M Neal, Zhenzong Fa, Daphne Cheng, Mike Ivey, Bethany B Moore, Jeffrey L Curtis, John J Osterholzer, Michal A Olszewski
Macrophage receptor with collagenous structure (MARCO) contributes to fungal containment during the early/innate phase of cryptococcal infection; however, its role in adaptive antifungal immunity remains unknown. Using a murine model of cryptococcosis, we compared host adaptive immune responses in wild-type and MARCO(-/-) mice throughout an extended time course post-infection. Unlike in early infection, MARCO deficiency resulted in improved pulmonary fungal clearance and diminished cryptococcal dissemination during the efferent phase...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29028998/high-cryptococcal-antigen-titers-in-blood-are-predictive-of-subclinical-cryptococcal-meningitis-among-hiv-infected-patients
#7
Rachel M Wake, Erika Britz, Charlotte Sriruttan, Ivy Rukasha, Tanvier Omar, David C Spencer, Jeremy S Nel, Sello Mashamaite, Adeboye Adelekan, Tom M Chiller, Joseph N Jarvis, Thomas S Harrison, Nelesh P Govender
Background: High mortality rates among asymptomatic cryptococcal antigen (CrAg)-positive patients identified through CrAg screening, despite pre-emptive fluconazole, may be due to undiagnosed cryptococcal meningitis. Methods: Symptoms were reviewed in CrAg-positive patients identified through screening 19,233 individuals with CD4 cell counts < 100 cells/µL at 17 clinics and 3 hospitals in Johannesburg from September 2012 until September 2015, and 2 of these hospitals until June 2016...
October 5, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29028957/long-term-mortality-and-disability-in-cryptococcal-meningitis-a-systematic-literature-review
#8
Estelle Pasquier, John Kunda, Pierre De Beaudrap, Angela Loyse, Elvis Temfack, Síle F Molloy, Thomas S Harrison, Olivier Lortholary
Cryptococcal meningitis (CM) is the primary cause of meningitis in HIV-infected adults and an emerging disease in HIV-seronegative individuals. No literature review has studied the long-term outcome of CM. We performed a systematic review on the long-term (≥3 months) impact of CM (C. neoformans and C. gattii) on mortality and disability in HIV-infected and non-HIV-infected adults. Though the quality of current evidence is limited, the long-term impact of CM on survival and disability appears to be high. One-year mortality ranged from 13% in an Australian non-HIV C...
October 4, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29025780/cryptococcus-neoformans-osteomyelitis-and-intramuscular-abscess-in-a-liver-transplant-patient
#9
Sonia Maria Poenaru, Rymon Rofaiel, Seyed M Hosseini-Moghaddam
Cryptococcus neoformans is an important pathogen that can cause severe illness and mortality in immunocompromised patients. We highlight here the case of a 53-year-old man presenting to hospital 4 years postliver transplant with fever, acute renal failure and a medial thigh lesion. Initially treated as bacterial sepsis, the patient failed to improve on broad-spectrum antibiotics. Further investigations revealed disseminated cryptococcemia complicated by patellar osteomyelitis and an intramuscular abscess. Unfortunately, although the patient initially showed signs of clinical improvement after starting standard antifungal agents, he deteriorated and died secondary to acute renal failure...
October 11, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/29021643/cryptococcal-cerebellitis-in-no-vih-patient
#10
Fabricio Andres Lasso, Tomas Omar Zamora Bastidas, Jorge Andrés Potosí García, Bairon Díaz Idrobo
INTRODUCTION: Cryptococcosis is an opportunistic fungal infection whose etiology is Cryptococcus neofromans / C. gattii, complex which affects immunocompromised patients mainly. Meningeal infection is one of the most common presentations, but cerebellar affection is rare. CASE DESCRIPTION: Male patient with 65 old years, from an area of subtropical climate with chronic exposure to poultry, without pathological antecedents, who presented clinical picture consistent with headache, fever, seizures and altered mental status...
June 30, 2017: Colombia Médica: CM
https://www.readbyqxmd.com/read/29021482/disseminated-cryptococcosis-with-marked-eosinophilia-in-a-postpartum-woman
#11
Tetsuya Yokoyama, Masako Kadowaki, Makoto Yoshida, Kunihiro Suzuki, Masashi Komori, Tomoaki Iwanaga
Disseminated cryptococcosis usually develops in immunosuppressed patients. A 33-year-old postpartum woman developed disseminated cryptococcosis with marked eosinophilia. She presented with a cough and a week-long fever. A computed tomography scan showed multiple pulmonary nodules randomly distributed. Eosinophils were observed to have increased in number in both her peripheral blood and bronchoalveolar lavage fluid. A transbronchial lung biopsy and cerebrospinal fluid specimens revealed findings consistent with cryptococcal infection...
October 11, 2017: Internal Medicine
https://www.readbyqxmd.com/read/29021481/cryptococcal-pleuritis-presenting-with-lymphocyte-predominant-and-high-levels-of-adenosine-deaminase-in-pleural-effusions-coincident-with-pulmonary-tuberculosis
#12
Yoshitomo Kushima, Hidenori Takizawa, Yasutaka Machida, Takafumi Umetsu, Naoya Ikeda, Masaaki Miyoshi, Kazuyuki Chibana, Yasuo Shimizu, Akihiro Takemasa, Yoshiki Ishii
Co-infection with cryptococcus and tuberculosis has rarely been reported. We herein report a case of an 80-year-old man with cryptococcal pleuritis concurrent with pulmonary tuberculosis. He was admitted for progression of left pleural effusion and consolidation in the left upper lobe. Culture for Mycobacterium tuberculosis was positive in sputum, and analyses of pleural effusion revealed lymphocyte-predominant high levels of adenosine deaminase (ADA). Medical thoracoscopy revealed massive infiltration of Cryptococcus neoformans in pleura without granuloma...
October 11, 2017: Internal Medicine
https://www.readbyqxmd.com/read/29021093/disseminated-cryptococcosis-in-a-patient-taking-tocilizumab-for-castleman-s-disease
#13
Hiroaki Nishioka, Hiroshi Takegawa, Hiroki Kamei
Infections occur more frequently in patients receiving biologics. However, cryptococcal infection is uncommon in patients receiving tocilizumab, an interleukin-6 inhibitor, in contrast to patients receiving tumor necrosis factor-α inhibitors. In this report, we describe a case of disseminated cryptococcosis in a 55-year-old man who was receiving tocilizumab every 2 weeks along with daily prednisolone and cyclosporine for Castleman's disease. He initially developed cellulitis on both upper limbs, and his condition worsened despite antibacterial therapy...
October 8, 2017: Journal of Infection and Chemotherapy: Official Journal of the Japan Society of Chemotherapy
https://www.readbyqxmd.com/read/29020172/high-dose-fluconazole-monotherapy-is-inadequate-for-csf-cryptococcal-antigen-positive-hiv-infected-persons-in-an-ethiopian-crag-screening-program
#14
Tafese Beyene, Anteneh G Zewde, Abera Balcha, Belda Hirpo, Tadele Yitbarik, Teshome Gebissa, Radha Rajasingham, David R Boulware
817 HIV-infected Ethiopians with CD4 <=150/mcL underwent lab-based reflex cryptococcal antigen(CrAg) screening, using remaining plasma after CD4 testing. Of participants with plasma CrAg titers >=1:640, 96% (27/28) had cryptococcal meningitis (CSF CrAg+). When treated with fluconazole 1200mg monotherapy, 68% (23/34) of CSF CrAg+ died within three months.
July 17, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28992308/relationship-between-intracranial-pressure-and-antifungal-agents-levels-in-the-csf-of-patients-with-cryptococcal-meningitis
#15
Fernanda Wirth, Maria Isabel de Azevedo, Carmen Pilla, Valério Rodrigues Aquino, Gustavo Wissmann Neto, Luciano Zubaran Goldani
The purpose of this study was to evaluate the influence of intracranial hypertension in the cerebrospinal fluid (CSF) levels of amphotericin B and fluconazole levels of patients with cryptococcal meningitis. CSF samples and intracranial pressure were obtained by means of routine punctures performed at days 1, 7, and 14 of therapy, respectively. Amphotericin B and fluconazole CSF levels were measured by HPLC method as previously described. The minimum inhibitory concentration for amphotericin B, fluconazole, 5΄flucytosine, and voriconazole of each Cryptococcus isolate was performed according to CLSI...
August 2, 2017: Medical Mycology: Official Publication of the International Society for Human and Animal Mycology
https://www.readbyqxmd.com/read/28992282/intraspecies-variation-in-the-efficacy-of-adjunctive-recombinant-interferon-%C3%AE-therapy-against-cryptococcal-meningoencephalitis-in-mice
#16
Yurika Ikeda-Dantsuji, Shigeki Nakamura, Hideaki Ohno, Tatsuya Inukai, Minoru Nagi, Keigo Ueno, Takashi Umeyama, Yuki Kinjo, Satoshi Yamagoe, Kazutoshi Shibuya, Yoshitsugu Miyazaki
The efficacy of recombinant interferon γ (rIFN-γ) for cryptococcal meningoencephalitis has been poorly understood. Compared to Cryptococcus gattii, rIFN-γ significantly improved the survival in experimental meningoencephalitis due to Cryptococcus neoformans. The number of phagocytic macrophages and the levels of inflammatory cytokines production for ex vivo co-incubation with C. neoformans were increased after rIFN-γ stimulation but not C. gattii. Intraspecies differences of phagocytosis by the rIFN-γ-activated macrophages might be associated to the severity of cryptococcal infection...
September 9, 2017: Medical Mycology: Official Publication of the International Society for Human and Animal Mycology
https://www.readbyqxmd.com/read/28992083/cryptococcal-meningoencephalitis-complicated-by-subdural-empyema-in-an-8-year-old-girl-with-neonatal-onset-multisystem-inflammatory-disease-syndrome-a-rare-sequela
#17
Scott Pangonis, Mark Dugan, Mary Beth Hogan, Sara Patrizi
No abstract text is available yet for this article.
September 6, 2017: Journal of the Pediatric Infectious Diseases Society
https://www.readbyqxmd.com/read/28991888/commonly-prescribed-antiretroviral-therapy-regimens-and-incidence-of-aids-defining-neurological-conditions
#18
Ellen C Caniglia, Andrew Phillips, Kholoud Porter, Caroline A Sabin, Alan Winston, Roger Logan, John Gill, Marie-Anne Vandenhende, Diana Barger, Sara Lodi, Santiago Moreno, José Ramón Arribas, Antonio Pacheco, Sandra W Cardoso, George Chrysos, Charalabos Gogos, Sophie Abgrall, Dominique Costagliola, Laurence Meyer, Remonie Seng, Ard van Sighem, Peter Reiss, Roberto Muga, Santiago Pérez Hoyos, Dominique Braun, Christoph Hauser, Pilar Barrufet, Maria Leyes, Janet Tate, Amy Justice, Miguel A Hernán
BACKGROUND: The differential effects of commonly prescribed combined antiretroviral therapy (cART) regimens on AIDS-defining neurological conditions (neuroAIDS) remain unknown. SETTING: Prospective cohort studies of HIV-positive individuals from Europe and the Americas included in the HIV-CAUSAL Collaboration. METHODS: Individuals who initiated a first-line cART regimen in 2004 or later containing a nucleoside reverse transcriptase inhibitor (NRTI) backbone and either atazanavir, lopinavir, darunavir, or efavirenz were followed from cART initiation until death, lost to follow-up, pregnancy, the cohort-specific administrative end of follow-up, or the event of interest, whichever occurred earliest...
October 4, 2017: Journal of Acquired Immune Deficiency Syndromes: JAIDS
https://www.readbyqxmd.com/read/28976803/ip3-4%C3%A2-kinase-arg1-regulates-cell-wall-homeostasis-and-surface-architecture-to-promote-clearance-of%C3%A2-cryptococcus-neoformans%C3%A2-infection-in-a-mouse-model
#19
Cecilia Li, Sophie Lev, Desmarini Desmarini, Keren Kaufman-Francis, Adolfo Saiardi, Ana P G Silva, Joel P Mackay, Philip E Thompson, Tania C Sorrell, Julianne T Djordjevic
We previously identified a series of inositol polyphosphate kinases (IPKs), Arg1, Ipk1, Kcs1 and Asp1, in the opportunistic fungal pathogen Cryptococcus neoformans. Using gene deletion analysis, we characterized Arg1, Ipk1 and Kcs1 and showed that they act sequentially to convert IP3 to PP-IP5 (IP7), a key metabolite promoting stress tolerance, metabolic adaptation and fungal dissemination to the brain. We have now directly characterized the enzymatic activity of Arg1, demonstrating that it is a dual specificity (IP3/IP4) kinase producing IP5...
October 4, 2017: Virulence
https://www.readbyqxmd.com/read/28974618/disarming-fungal-pathogens-bacillus-safensis-inhibits-virulence-factor-production-and-biofilm-formation-by-cryptococcus-neoformans-and-candida-albicans
#20
François L Mayer, James W Kronstad
Bacteria interact with each other in nature and often compete for limited nutrient and space resources. However, it is largely unknown whether and how bacteria also interact with human fungal pathogens naturally found in the environment. Here, we identified a soil bacterium, Bacillus safensis, which potently blocked several key Cryptococcus neoformans virulence factors, including formation of the antioxidant pigment melanin and production of the antiphagocytic polysaccharide capsule. The bacterium also inhibited de novo cryptococcal biofilm formation but had only modest inhibitory effects on already formed biofilms or planktonic cell growth...
October 3, 2017: MBio
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