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Alajmi S, Koratum RM, Khan Z, Ahmad S, Jeragh A, Ibrahim H, Joseph L, Varghese S. Allergic Fungal Sinusitis Caused by Exserohilum rostratum and Literature Review. Mycopathologia 2018; 184:89-96. [PMID: 30168078 DOI: 10.1007/s11046-018-0288-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Accepted: 07/06/2018] [Indexed: 12/25/2022]
Abstract
A case of allergic fungal sinusitis (AFS) caused by Exserohilum rostratum, proven by culture and histopathology of the biopsy material, is described. The identity of the isolate was confirmed by sequencing of ITS region of rDNA. To the best of our knowledge, this is the first report of allergic E. rostratum sinusitis from Kuwait and Arabian Peninsula. Ten previously described cases of AFS have been reviewed. The report highlights the emerging importance of E. rostratum as a human pathogen in this region and role of molecular methods in its accurate identification.
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Affiliation(s)
- Salma Alajmi
- Department of Microbiology, Al-Adan Hospital, Hadiya, Kuwait
| | | | - Ziauddin Khan
- Department of Microbiology, Faculty of Medicine, Kuwait University, P. O. Box 24923, Safat, 1311, Kuwait.
| | - Suhail Ahmad
- Department of Microbiology, Faculty of Medicine, Kuwait University, P. O. Box 24923, Safat, 1311, Kuwait
| | - Ahlam Jeragh
- Department of Microbiology, Al-Adan Hospital, Hadiya, Kuwait
| | - Hany Ibrahim
- Department of Pathology, Al-Adan Hospital, Hadiya, Kuwait
| | - Leena Joseph
- Department of Microbiology, Faculty of Medicine, Kuwait University, P. O. Box 24923, Safat, 1311, Kuwait
| | - Soumya Varghese
- Department of Microbiology, Faculty of Medicine, Kuwait University, P. O. Box 24923, Safat, 1311, Kuwait
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Moulds associated with contaminated ocular and injectable drugs: FDA recalls, epidemiology considerations, drug shortages, and aseptic processing. Med Mycol 2017; 56:389-394. [DOI: 10.1093/mmy/myx070] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Accepted: 08/26/2017] [Indexed: 12/24/2022] Open
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McCarthy MW, Walsh TJ. Drug development challenges and strategies to address emerging and resistant fungal pathogens. Expert Rev Anti Infect Ther 2017; 15:577-584. [PMID: 28480775 DOI: 10.1080/14787210.2017.1328279] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
INTRODUCTION Invasive fungal infections represent an expanding threat to public health. The recent emergence of Candida auris, which is often resistant to existing antifungal agents and is associated with a high mortality rate, underscores the urgent need for novel drug development strategies. Areas covered: In this paper, we examine both challenges and opportunities associated with antifungal drug development and explore potential avenues to accelerate the development pipeline, including data sharing, surrogate endpoints, and the role of historical controls in clinical trials. Expert commentary: We review important lessons learned from the study of other rare diseases, including mitochondrial storage diseases and certain forms of cancer that may inform strategies to develop new antifungal agents while highlighting promising new compounds such as SCY-078 for the treatment of invasive fungal infections.
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Affiliation(s)
- Matthew W McCarthy
- a Department of Medicine, Joan and Sanford I Weill Medical College of Cornell University , New York , NY , USA
| | - Thomas J Walsh
- b Weill Cornell Medical Center , Transplantation-Oncology Infectious Diseases Program , New York , NY , USA
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Ho J, Fowler P, Heidari A, Johnson RH. Intrathecal Amphotericin B: A 60-Year Experience in Treating Coccidioidal Meningitis. Clin Infect Dis 2017; 64:519-524. [PMID: 27927853 DOI: 10.1093/cid/ciw794] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Accepted: 11/22/2016] [Indexed: 12/14/2022] Open
Abstract
Coccidioidal meningitis (CM) is a devastating complication of coccidioidomycosis. Since the late 1950s, intrathecal (IT) amphotericin B deoxycholate (AmBd) has been successfully used to treat and often cure this disease, reducing mortality rates from 100% to approximately 30%. The introduction of azoles further revolutionized the treatment of coccidioidal infections. However, IT AmBd remains the only known curative option in the management of CM. While the use of IT AmBd is well described in many articles, few discuss the actual methods behind preparation, titration, and dosing strategies utilized. The practitioners at Kern Medical (Bakersfield, California) have >60 years of experience in the utilization of IT AmBd and the treatment of CM. This article describes the practice experience in the treatment of CM, preparation of IT AmBd, and the different dosing strategies used in regard to route of administration (ie, cisternal, lumbar, ventricular).
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Affiliation(s)
- Jackie Ho
- Department of Pharmacy, Kern Medical, Bakersfield, California, USA
| | - Pete Fowler
- Department of Pharmacy, Kern Medical, Bakersfield, California, USA
| | - Arash Heidari
- Department of Medicine, Kern Medical, Bakersfield, California, USA.,David Geffen School of Medicine, University of California, Los Angeles, California, USA
| | - Royce H Johnson
- Department of Medicine, Kern Medical, Bakersfield, California, USA.,David Geffen School of Medicine, University of California, Los Angeles, California, USA
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The Carbohydrate Lectin Receptor Dectin-1 Mediates the Immune Response to Exserohilum rostratum. Infect Immun 2017; 85:IAI.00903-16. [PMID: 28031265 DOI: 10.1128/iai.00903-16] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Accepted: 12/22/2016] [Indexed: 12/16/2022] Open
Abstract
Dematiaceous molds are found ubiquitously in the environment and cause a wide spectrum of human disease, including infections associated with high rates of mortality. Despite this, the mechanism of the innate immune response has been less well studied, although it is key in the clearance of fungal pathogens. Here, we focus on Exserohilum rostratum, a dematiaceous mold that caused 753 infections during a multistate outbreak due to injection of contaminated methylprednisolone. We show that macrophages are incapable of phagocytosing Exserohilum Despite a lack of phagocytosis, macrophage production of tumor necrosis factor alpha is triggered by hyphae but not spores and depends upon Dectin-1, a C-type lectin receptor. Dectin-1 is specifically recruited to the macrophage-hyphal interface but not the macrophage-spore interface due to differences in carbohydrate antigen expression between these two fungal forms. Corticosteroid and antifungal therapy perturb this response, resulting in decreased cytokine production. In vivo soft tissue infection in wild-type mice demonstrated that Exserohilum provokes robust neutrophilic and granulomatous inflammation capable of thwarting fungal growth. However, coadministration of methylprednisolone acetate results in robust hyphal tissue invasion and a significant reduction in immune cell recruitment. Our results suggest that Dectin-1 is crucial for macrophage recognition and the macrophage response to Exserohilum and that corticosteroids potently attenuate the immune response to this pathogen.
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Miceli MH, Churay T, Braun T, Kauffman CA, Couriel DR. Risk Factors and Outcomes of Invasive Fungal Infections in Allogeneic Hematopoietic Cell Transplant Recipients. Mycopathologia 2017; 182:495-504. [PMID: 28124219 DOI: 10.1007/s11046-017-0115-y] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Accepted: 01/11/2017] [Indexed: 01/12/2023]
Abstract
Allogeneic hematopoietic cell transplant (HCT) recipients are at increased risk of invasive fungal infections (IFI), which are associated with a high mortality rate. We evaluated the impact of IFI in allogeneic HCT patients. In total, 541 consecutive allogeneic HCT recipients were included. The cumulative incidence of any IFI and mold infections at 1-year post-HCT was 10 and 7%, respectively. Median times to IFI and mold infection were 200 and 210 days, respectively. There was a trend toward fewer IFI and mold infections in the last several years. Both acute graft-versus-host disease (GVHD) (OR 1.83, p = 0.05) and corticosteroid duration (OR 1.0, p = 0.026) were significantly associated with increased risk of IFI, acute GVHD (OR 2.3, p = 0.027) emerged as the most important association with mold infections. Any IFI [HR 4.1 (2.79-6.07), p < 0.0001] and mold infections [HR 3.34 (2.1-5.1), p < 0.0001] were independently associated with non-relapse mortality (NRM). This association persisted in the setting of both acute and chronic GVHD. Corticosteroid treatment for >90 days was also significantly associated with higher NRM [HR 1.9 (1.3-2.6), p < 0.0001]. This study highlights the impact of IFI on NRM among HCT patients. The decrease in number of IFI and mold infections over the last several years may reflect the benefit of prophylaxis with mold-active antifungal agents.
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Affiliation(s)
- Marisa H Miceli
- Division of Infectious Diseases, Department of Internal Medicine, University of Michigan Health System, 3119 Taubman Center, Ann Arbor, MI, 48109, USA.
| | - Tracey Churay
- Adult Blood and Marrow Transplantation Program, Ann Arbor, MI, USA
| | - Thomas Braun
- Department of Biostatistics, University of Michigan Health System, Ann Arbor, MI, USA
| | - Carol A Kauffman
- Division of Infectious Diseases, Department of Internal Medicine, University of Michigan Health System, 3119 Taubman Center, Ann Arbor, MI, 48109, USA.,Division of Infectious Diseases, Department of Internal Medicine, Veterans Affairs Ann Arbor Healthcare System, Ann Arbor, MI, USA
| | - Daniel R Couriel
- Huntsman Cancer Center, University of Utah, Salt Lake City, UT, USA
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Bellanger AP, Minetos YD, Albert N, Shirazi F, Walsh TJ, Kontoyiannis DP. Glucocorticosteroids do not impact directly growth rate and biomass of Rhizopus arrhizus (syn. R. oryzae) in vitro. Virulence 2016; 6:441-3. [PMID: 25942104 DOI: 10.1080/21505594.2015.1039762] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Abstract
Glucocorticoid (GC) use is a common risk factor for invasive fungal infections. This is attributed to the complex dysregulation of immunity caused by GCs. However, studies have demonstrated increased growth with GC exposure for some molds, such as Aspergillus fumigatus and Exserohilum rostratum. No such data exist for Mucorales. Therefore, we investigated the influence of GC exposure on the growth of Rhizopus arrhizus (syn. R. oryzae) in different culture media and in different atmospheres. We measured continuous spore growth using spectrophotometry and biomass variations using XTT assay. We did not observe enhanced growth or biomass variation with any of the GCs regardless of the medium or conditions. These results support the existence of fungus-specific differences in the effect of GCs on fungal biology.
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Affiliation(s)
- A P Bellanger
- a Infectious Disease Department; MD Anderson Cancer Center , Houston , Texas
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Shirazi F, Ferreira JAG, Stevens DA, Clemons KV, Kontoyiannis DP. Biofilm Filtrates of Pseudomonas aeruginosa Strains Isolated from Cystic Fibrosis Patients Inhibit Preformed Aspergillus fumigatus Biofilms via Apoptosis. PLoS One 2016; 11:e0150155. [PMID: 26930399 PMCID: PMC4773012 DOI: 10.1371/journal.pone.0150155] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2015] [Accepted: 02/10/2016] [Indexed: 01/08/2023] Open
Abstract
Pseudomonas aeruginosa (Pa) and Aspergillus fumigatus (Af) colonize cystic fibrosis (CF) patient airways. Pa culture filtrates inhibit Af biofilms, and Pa non-CF, mucoid (Muc-CF) and nonmucoid CF (NMuc-CF) isolates form an ascending inhibitory hierarchy. We hypothesized this activity is mediated through apoptosis induction. One Af and three Pa (non-CF, Muc-CF, NMuc-CF) reference isolates were studied. Af biofilm was formed in 96 well plates for 16 h ± Pa biofilm filtrates. After 24 h, apoptosis was characterized by viability dye DiBAc, reactive oxygen species (ROS) generation, mitochondrial membrane depolarization, DNA fragmentation and metacaspase activity. Muc-CF and NMuc-CF filtrates inhibited and damaged Af biofilm (p<0.0001). Intracellular ROS levels were elevated (p<0.001) in NMuc-CF-treated Af biofilms (3.7- fold) compared to treatment with filtrates from Muc-CF- (2.5- fold) or non-CF Pa (1.7- fold). Depolarization of mitochondrial potential was greater upon exposure to NMuc-CF (2.4-fold) compared to Muc-CF (1.8-fold) or non-CF (1.25-fold) (p<0.0001) filtrates. Exposure to filtrates resulted in more DNA fragmentation in Af biofilm, compared to control, mediated by metacaspase activation. In conclusion, filtrates from CF-Pa isolates were more inhibitory against Af biofilms than from non-CF. The apoptotic effect involves mitochondrial membrane damage associated with metacaspase activation.
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Affiliation(s)
- Fazal Shirazi
- Department of Infectious Diseases, Infection Control and Employee Health, The University of Texas M D Anderson Cancer Center, Houston, TX, 77030, United States of America
| | - Jose A. G. Ferreira
- Div. of Infectious Diseases and Geographic Medicine, Stanford University School of Medicine, Stanford, California, 94305, United States of America
- California Institute for Medical Research, San Jose, California, 95128, United States of America
| | - David A. Stevens
- Div. of Infectious Diseases and Geographic Medicine, Stanford University School of Medicine, Stanford, California, 94305, United States of America
- California Institute for Medical Research, San Jose, California, 95128, United States of America
| | - Karl V. Clemons
- Div. of Infectious Diseases and Geographic Medicine, Stanford University School of Medicine, Stanford, California, 94305, United States of America
- California Institute for Medical Research, San Jose, California, 95128, United States of America
| | - Dimitrios P. Kontoyiannis
- Department of Infectious Diseases, Infection Control and Employee Health, The University of Texas M D Anderson Cancer Center, Houston, TX, 77030, United States of America
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Hodge G, Cohen SH, Thompson GR. In vitro interactions between amphotericin B and hydrocortisone: potential implications for intrathecal therapy. Med Mycol 2015; 53:749-53. [PMID: 26162473 DOI: 10.1093/mmy/myv047] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2015] [Accepted: 05/17/2015] [Indexed: 12/19/2022] Open
Abstract
Fungal meningitis remains a severe and often lethal infection requiring aggressive antifungal therapy and in refractory cases the use of intrathecal amphotericin B (AmB). Administration of amphotericin B by this method may result in clinically apparent adverse reactions such as paresthesias, radiculitis, or myelopathy. Coadministration of hydrocortisone is therefore often given in an attempt to avoid these effects; however, the potential consequences of this approach on fungal growth or on drug synergy/antagonism had not previously been assessed. We used the checkerboard titration broth microdilution method to analyze interactions by fractional inhibitory concentration indices (FICIs). The combination of amphotericin B and hydrocortisone resulted in synergy or indifference against all isolates (Candida, Cryptococcus, and Coccidioides) during in vitro testing at low concentrations. Antagonism was observed using higher hydrocortisone concentrations (those not observed in vivo) suggesting possible steric hindrance or binding to AmB may occur at doses unlikely to be present during clinical care. Concurrent hydrocortisone and AmB administration should not be avoided due to in vitro antagonism concerns.
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Affiliation(s)
- Greg Hodge
- Department of Medical Microbiology and Immunology, University of California-Davis
| | - Stuart H Cohen
- Department of Internal Medicine, Division of Infectious Diseases, University of California Davis Medical Center
| | - George R Thompson
- Department of Medical Microbiology and Immunology, University of California-Davis Department of Internal Medicine, Division of Infectious Diseases, University of California Davis Medical Center
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Outbreak of fungal infections associated with contaminated methylprednisolone acetate: an update. Curr Infect Dis Rep 2014; 17:441. [PMID: 25416847 DOI: 10.1007/s11908-014-0441-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
In September 2012, an unprecedented outbreak of fungal infections due to preservative-free, injectable methylprednisolone acetate (MPA) was identified. Exserohilum rostratum was quickly identified as the predominant organism involved in disease cases. Prior to this outbreak, little was known about the pathogenesis, treatment, and prognosis of infections due to this unusual brown-black mold. Almost 2 years after the onset of this outbreak, numerous epidemiologic and basic science studies have provided some guidance in understanding the epidemiology, clinical findings, diagnosis, and treatment of patients exposed to the contaminated medication. Additionally, this outbreak has directly led to the passage of legislation supporting increased regulation in the industry of pharmaceutical compounding. Many unanswered questions, particularly surrounding the long-term prognosis and outcomes for affected patients remain. However, it is clear that a strong relationship between clinicians caring for patients and public health as well as a rapid, effective public health response was critical in preventing additional cases of disease.
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