ABSTRACT
BACKGROUND: The International Society for Human and Animal Mycology (ISHAM) working group proposed recommendations for managing allergic bronchopulmonary aspergillosis (ABPA) a decade ago. There is a need to update these recommendations due to advances in diagnostics and therapeutics. METHODS: An international expert group was convened to develop guidelines for managing ABPA (caused by Aspergillus spp.) and allergic bronchopulmonary mycosis (ABPM; caused by fungi other than Aspergillus spp.) in adults and children using a modified Delphi method (two online rounds and one in-person meeting). We defined consensus as ≥70% agreement or disagreement. The terms "recommend" and "suggest" are used when the consensus was ≥70% and <70%, respectively. RESULTS: We recommend screening for A. fumigatus sensitisation using fungus-specific IgE in all newly diagnosed asthmatic adults at tertiary care but only difficult-to-treat asthmatic children. We recommend diagnosing ABPA in those with predisposing conditions or compatible clinico-radiological presentation, with a mandatory demonstration of fungal sensitisation and serum total IgE ≥500â IU·mL-1 and two of the following: fungal-specific IgG, peripheral blood eosinophilia or suggestive imaging. ABPM is considered in those with an ABPA-like presentation but normal A. fumigatus-IgE. Additionally, diagnosing ABPM requires repeated growth of the causative fungus from sputum. We do not routinely recommend treating asymptomatic ABPA patients. We recommend oral prednisolone or itraconazole monotherapy for treating acute ABPA (newly diagnosed or exacerbation), with prednisolone and itraconazole combination only for treating recurrent ABPA exacerbations. We have devised an objective multidimensional criterion to assess treatment response. CONCLUSION: We have framed consensus guidelines for diagnosing, classifying and treating ABPA/M for patient care and research.
Subject(s)
Aspergillosis, Allergic Bronchopulmonary , Invasive Pulmonary Aspergillosis , Adult , Child , Humans , Aspergillosis, Allergic Bronchopulmonary/diagnosis , Aspergillosis, Allergic Bronchopulmonary/drug therapy , Immunoglobulin E , Invasive Pulmonary Aspergillosis/diagnosis , Invasive Pulmonary Aspergillosis/drug therapy , Itraconazole/therapeutic use , Mycology , PrednisoloneABSTRACT
A deficiency of the essential macronutrient sulfur leads to stunted plant growth and yield loss; however, an association with a symbiotic fungus can greatly improve nutrient uptake by the host plant. Here, we identified and functionally characterized a high-affinity sulfate transporter from the endophytic fungus Serendipita indica. SiSulT fulfills all the criteria expected of a functional sulfate transporter responding to sulfur limitation: SiSulT expression was induced when S. indica was grown under low-sulfate conditions, and heterologous expression of SiSulT complemented a yeast mutant lacking sulfate transport. We generated a knockdown strain of SiSulT by RNA interference to investigate the consequences of the partial loss of this transporter for the fungus and the host plant (maize, Zea mays) during colonization. Wild-type (WT) S. indica, but not the knockdown strain (kd-SiSulT), largely compensated for low-sulfate availability and supported plant growth. Colonization by WT S. indica also allowed maize roots to allocate precious resources away from sulfate assimilation under low-sulfur conditions, as evidenced by the reduction in expression of most sulfate assimilation genes. Our study illustrates the utility of the endophyte S. indica in sulfur nutrition research and offers potential avenues for agronomically sound amelioration of plant growth in low-sulfate environments.
Subject(s)
Basidiomycota/physiology , Sulfate Transporters/metabolism , Sulfur/metabolism , Zea mays/growth & development , Zea mays/microbiology , Axenic Culture , Basidiomycota/metabolism , Biological Transport , Chromates/metabolism , Fungal Proteins/genetics , Fungal Proteins/metabolism , Gene Expression Regulation, Fungal , Gene Expression Regulation, Plant , Mutation , Mycology/methods , Phylogeny , RNA Interference , Sulfate Transporters/genetics , Sulfates/metabolism , Yeasts/genetics , Zea mays/metabolismABSTRACT
The success of the clinical management of invasive fungal diseases (IFD) is highly dependent on suitable tools for timely and accurate diagnosis for effective treatment. An in-depth analysis of the ability of European institutions to promptly and accurately diagnose IFD was previously conducted to identify limitations and aspects to improve. Here, we evaluated and discussed the specific case of Portugal, for which, to our knowledge, there are no reports describing the national mycological diagnostic capacity and access to antifungal treatment. Data from 16 Portuguese medical institutions were collected via an online electronic case report form covering different parameters, including institution profile, self-perceived IFD incidence, target patients, diagnostic methods and reagents, and available antifungals. The majority of participating institutions (69%) reported a low-very low incidence of IFD, with Candida spp. indicated as the most relevant fungal pathogen, followed by Aspergillus spp. and Cryptococcus spp. All institutions had access to culture and microscopy, whereas 94 and 88% were able to run antigen-detection assays and molecular tests, respectively. All of the institutions capable of providing antifungal therapy declared to have access to at least one antifungal. However, echinocandins were only available at 85% of the sites. Therapeutic drug monitoring (TDM) was reported to remain a very restricted practice in Portugal, being available in 19% of the institutions, with the TDM of itraconazole and posaconazole performed in only 6% of them. Importantly, several of these resources are outsourced to external entities. Except for TDM, Portugal appears to be well-prepared concerning the overall capacity to diagnose and treat IFD. Future efforts should focus on promoting the widespread availability of TDM and improved access to multiple classes of antifungals, to further improve patient outcomes.
Subject(s)
Antifungal Agents , Invasive Fungal Infections , Humans , Portugal , Mycology , Itraconazole , EchinocandinsABSTRACT
The European Confederation of Medical Mycology (ECMM), formed due to the surge in invasive fungal infections (IFI), initiated the Excellence Centers program in 2016 to guide stakeholders to leading medical mycology sites. This report focuses on the Cologne ECMM Excellence Center, recognized with Diamond status for active global involvement in 2017. The center offers free consultation via email and phone, responding within 24 h for life-threatening IFI, collecting data on origin, pathogens, infection details, and more. Over two years, 189 requests were received globally, predominantly from Germany (85%), mainly involving Aspergillus spp., Mucorales, and Candida spp. Fungal mixed infections occurred in 4% of cases. The center's service effectively addresses IFI challenges, advocating for a comprehensive study encompassing all ECMM Excellence Centers to enhance global mycological care. Proactive expansion of consultancy platforms is crucial, with future analyses needed to assess expert advice's impact on patient outcomes.
Subject(s)
Invasive Fungal Infections , Mycoses , Humans , Mycology , Invasive Fungal Infections/diagnosis , Invasive Fungal Infections/drug therapy , Mycoses/drug therapy , Aspergillus , Referral and Consultation , Antifungal Agents/therapeutic useABSTRACT
BACKGROUND: Conventional testing methods for dermatophytes are time-consuming, and resource limitations in our institution have prompted curtailed access to these diagnostics. OBJECTIVES: Evaluation of our hospital's dermatological mycology diagnostic services and similar services nationally. METHODS: This was a retrospective observational study on skin, hair and nail mycology samples in our institution comparing twenty five-year periods (2011-2015 and 2016-2021), including analysis of dermatology clinic data and correspondence related to fungal infection. A survey of national public hospitals' laboratories was conducted to evaluate their mycology testing capabilities. RESULTS: The total 5 year test count prior to curtailment was 4851 specimens comprising 90% (n = 4344) from general practice and 6% (n = 290) from dermatology clinics. For the 5 years post curtailment, 64.5% (582/903) of specimens were from dermatology clinics. Dermatology clinic data demonstrated doubling of attendances (for all conditions) and of correspondence related to fungal infection. During this time also, national dermatological antifungal purchasing increased 11%. Ten of 28 Irish public hospital laboratories reported the provision of in-house dermatological mycology testing, and none had routine availability of susceptibility or molecular testing of dermatophytes. CONCLUSION: This study is the first to report an appraisal of dermatological fungal diagnostic services in Ireland. Insufficient testing capacity implies that patients are either being treated for fungal infection without appropriate diagnostic confirmation, or being left untreated because of the lack of access to diagnostics. The introduction of molecular detection methods and susceptibility systems would enhance testing capabilities and reduce the requirement for the external referral.
Subject(s)
Dermatology , Mycoses , Humans , Mycology/methods , Ireland/epidemiology , Mycoses/microbiology , Skin/microbiologyABSTRACT
Online social media networks are an integral part of modern life. Microblogging sites such as Twitter have hundreds of millions of active users globally and have been enthusiastically adopted by many in the medical profession. For advancing a relatively neglected field such as fungal infection, this can be especially advantageous. Education, research networking, case discussions and public and patient engagement can all be greatly enhanced through the use of social media networks. This review highlights the ways in which this can work successfully in the case of aspergillosis and fungal infection in general, as well as highlighting the dangers and pitfalls of social media medicine.
Subject(s)
Aspergillosis , Mycoses , Social Media , Humans , Mycology , Aspergillosis/drug therapyABSTRACT
Italian mycologist Pier Andrea Saccardo is best remembered for his monumental Sylloge Fungorum, the first 'modern' effort to compile all identified fungi within a single classification scheme. The existing history of mycology is limited and has primarily focused on developments within England, but this article argues that Saccardo and his collaborators on the Sylloge supported a vital transnational expansion of mycological knowledge exchange and played a crucial role in stabilizing the tangled knot of local naming and identification among the world's amateur and professional mycologists. Written in the 'universal' scientific language of Latin, the Sylloge served as an early database of fungal knowledge and symbolized a broader unification of mycological inquiry in a moment of expanded scientific correspondence. The article situates this proto-database in broader histories of big data in biology and shows how the Sylloge formed a globalizing foundation for the twentieth century's major collecting and taxonomic advances in mycology.
Subject(s)
Fungi , Mycology , Humans , Spores, Fungal , Italy , AthletesABSTRACT
Critically ill patients with coronavirus disease 2019 (COVID-19) may develop COVID-19-associated pulmonary aspergillosis (CAPA), which impacts their chances of survival. Whether positive bronchoalveolar lavage fluid (BALF) mycological tests can be used as a survival proxy remains unknown. We conducted a post hoc analysis of a previous multicenter, multinational observational study with the aim of assessing the differential prognostic impact of BALF mycological tests, namely, positive (optical density index of ≥1.0) BALF galactomannan (GM) and positive BALF Aspergillus culture alone or in combination for critically ill patients with COVID-19. Of the 592 critically ill patients with COVID-19 enrolled in the main study, 218 were included in this post hoc analysis, as they had both test results available. CAPA was diagnosed in 56/218 patients (26%). Most cases were probable CAPA (51/56 [91%]) and fewer were proven CAPA (5/56 [9%]). In the final multivariable model adjusted for between-center heterogeneity, an independent association with 90-day mortality was observed for the combination of positive BALF GM and positive BALF Aspergillus culture in comparison with both tests negative (hazard ratio, 2.53; 95% CI confidence interval [CI], 1.28 to 5.02; P = 0.008). The other independent predictors of 90-day mortality were increasing age and active malignant disease. In conclusion, the combination of positive BALF GM and positive BALF Aspergillus culture was associated with increased 90-day mortality in critically ill patients with COVID-19. Additional study is needed to explore the possible prognostic value of other BALF markers.
Subject(s)
COVID-19 , Invasive Pulmonary Aspergillosis , Pulmonary Aspergillosis , Aspergillus , Bronchoalveolar Lavage Fluid , COVID-19/complications , Critical Illness , Galactose/analogs & derivatives , Humans , Intensive Care Units , Invasive Pulmonary Aspergillosis/complications , Invasive Pulmonary Aspergillosis/diagnosis , Mannans , Mycology , Prognosis , Sensitivity and SpecificityABSTRACT
Invasive fungal disease (IFD) remains a common and serious complication in children treated for leukaemia. Antifungal prescription in children with leukaemia presents unique challenges, particularly due to variation in IFD risk between and within leukaemia treatment protocols, drug toxicities and interactions between antifungals and chemotherapeutic agents. With recent advances in the understanding of IFD epidemiology and large clinical trials in adults assessing antifungals for IFD treatment and prophylaxis, together with paediatric clinical and pharmacokinetic studies, there is a growing body of data to inform optimal antifungal use in children. A panel of infectious diseases and haematology-oncology clinicians with expertise in IFD management compiled a list of 10 key clinical questions following development of the 2021 Australia and New Zealand Mycology Antifungal Consensus Guidelines. A focused literature review was conducted to explore available evidence and identify gaps in knowledge to direct future research. With the changing epidemiology of IFD globally, the ongoing evolution of paediatric leukaemia treatment and the increasing availability of novel antifungal agents, advocacy for paediatric clinical studies will remain vital to optimize IFD prevention and treatment in children with leukaemia.
Subject(s)
Hematology , Invasive Fungal Infections , Leukemia, Myeloid, Acute , Antifungal Agents/therapeutic use , Child , Humans , Invasive Fungal Infections/drug therapy , Invasive Fungal Infections/epidemiology , Invasive Fungal Infections/prevention & control , Leukemia, Myeloid, Acute/drug therapy , MycologyABSTRACT
Fungal pathogens represent a major human threat affecting more than a billion people worldwide. Invasive infections are on the rise, which is of considerable concern because they are accompanied by an escalation of antifungal resistance. Deciphering the mechanisms underlying virulence traits and drug resistance strongly relies on genetic manipulation techniques such as generating mutant strains carrying specific mutations, or gene deletions. However, these processes have often been time-consuming and cumbersome in fungi due to a number of complications, depending on the species (e.g., diploid genomes, lack of a sexual cycle, low efficiency of transformation and/or homologous recombination, lack of cloning vectors, nonconventional codon usage, and paucity of dominant selectable markers). These issues are increasingly being addressed by applying clustered regularly interspaced short palindromic repeats (CRISPR)-Cas9 mediated genetic manipulation to medically relevant fungi. Here, we summarize the state of the art of CRISPR-Cas9 applications in four major human fungal pathogen lineages: Candida spp., Cryptococcus neoformans, Aspergillus fumigatus, and Mucorales. We highlight the different ways in which CRISPR has been customized to address the critical issues in different species, including different strategies to deliver the CRISPR-Cas9 elements, their transient or permanent expression, use of codon-optimized CAS9, and methods of marker recycling and scarless editing. Some approaches facilitate a more efficient use of homology-directed repair in fungi in which nonhomologous end joining is more commonly used to repair double-strand breaks (DSBs). Moreover, we highlight the most promising future perspectives, including gene drives, programmable base editors, and nonediting applications, some of which are currently available only in model fungi but may be adapted for future applications in pathogenic species. Finally, this review discusses how the further evolution of CRISPR technology will allow mycologists to tackle the multifaceted issue of fungal pathogenesis.
Subject(s)
CRISPR-Cas Systems , Mycology/methods , Aspergillus fumigatus/genetics , Cryptococcus neoformans/genetics , Forecasting , Gene Editing , Humans , Mucorales/geneticsABSTRACT
The gold standard for diagnosis of invasive fungal infections caused by filamentous fungi remains the visualization of fungal elements in fluids, and biopsy/tissue collected from a normally sterile body site. Parallel recovery of viable fungus from the sample subsequently permits antifungal susceptibility testing of the individual isolate. Central to both processes is the appropriate processing of tissue specimens to avoid damaging fungal elements and optimize viable organism recovery. Historically, mycologists have proposed that homogenization (grinding or bead-beating) of tissue should be avoided in cases of suspected fungal infection as it likely damages hyphae, instead preferring to chop tissue into small portions (dicing) for direct microscopic examination and culture. Here, we have compared the two processes directly on material from clinical patient cases of mucoromycosis and invasive aspergillosis. Representative portions of fresh biopsy samples were processed in parallel either by chopping (dicing) in the mycology reference laboratory or by bead-beating in the adjoining general microbiology laboratory. Aliquots of the samples were then cultured under identical conditions and subjected to direct microscopic examination. The results demonstrated that tissue homogenization significantly reduced (i) organism recovery rates in cases of both mucoromycosis and invasive aspergillosis and (ii) the number of fungal elements detectable upon direct microscopic examination. To our knowledge, this is the first study to directly compare these alternative processing methods and despite only employing a limited number of samples the data presented here, provide support for the perceived mycological wisdom that homogenization of tissue samples should be avoided when filamentous fungal infections are suspected.
The gold standard for diagnosis of fungal infections remains the visualization of fungal elements in samples from usually sterile sites. Here we show that certain methods employed for processing biopsy samples significantly impact the ability to detect and grow fungi from genuine cases of infection.
Subject(s)
Microscopy , Mycology , Animals , Microscopy/veterinaryABSTRACT
Invasive fungal infections (IFIs) and medical mycology receive little attention in Ghana. However, the present evolution of biomarker assays for IFIs, offers an opportunity for an increased access to fungal laboratory testing in resource-limited settings, and probably make a case for availability of essential antifungal agents. Using surveys and personal communications, the state of medical mycology and IFI in Ghana were highlighted. Inadequate awareness and insufficient access to fungal diagnostics and therapeutics were identified as the key challenges, the establishment of the Ghana Medical Mycology Society was discussed, and recommendations were made to improve the status quo.
Invasive fungal infections (IFIs) receive little attention in Ghana, despite its growing relevance globally. Using surveys and personal communications, the main challenges were identified, and the formation of the Ghana Medical Mycology Society was discussed as a tool to improve the status quo.
Subject(s)
Invasive Fungal Infections , Mycology , Animals , Antifungal Agents/therapeutic use , Ghana , Invasive Fungal Infections/diagnosis , Invasive Fungal Infections/drug therapy , Invasive Fungal Infections/microbiology , Invasive Fungal Infections/veterinary , Surveys and QuestionnairesABSTRACT
The ability of medical centers in Eastern and South-Eastern Europe to diagnose and treat fungal infections remains unknown. In order to investigate that, here we conducted a cross-sectional online survey, released at both The International Society for Human & Animal Mycology (ISHAM) and European Confederation of Medical Mycology (ECMM) websites. A total of 31 institutions responded to the questionnaire. Most centers (87.1%, n = 27) had access to Aspergillus spp. ELISA galactomannan testing as well as to Cryptococcus spp. antigen testing (83.9%, n = 26). Serological tests were mostly available for Aspergillus species (80.6%, n = 25); and most institutions reported access to mold-active antifungal drugs (83.9%; n = 26), but 5-flucytosine was available to only 29% (n = 9) of the participant centers. In conclusion, this study represents the first attempt to document the strengths and limitations of the Eastern and South-Eastern European region for diagnosing and treating fungal diseases. LAY SUMMARY: Our article is about the availability of diagnostic and treatments tools related to fungal infections in the countries of Eastern and South-Eastern region. Surveys like these are important to understand the gaps and point towards the fungal infections as a global health issue.
Subject(s)
Mycology , Mycoses , Animals , Antifungal Agents/therapeutic use , Cross-Sectional Studies , Europe , Europe, Eastern , Humans , Mycoses/diagnosis , Mycoses/drug therapy , Mycoses/microbiology , Mycoses/veterinaryABSTRACT
BACKGROUND: Invasive pulmonary aspergillosis (IPA) is seen during coronavirus-2019 (COVID-19), has been reported in different incidences, and is defined as COVID-19-associated pulmonary aspergillosis (CAPA). Detection of galactomannan antigen is an important diagnostic step in diagnosing IPA. Enzyme-linked immunoassay (ELISA) is the most frequently used method, and lateral flow assay (LFA) is increasingly used with high sensitivity and specificity for rapid diagnosis. The present study aimed to compare the sensitivity of LFA and ELISA in the diagnosis of CAPA in COVID-19 patients followed in our hospital's ICU for pandemic (ICU-P). METHODS: This study included patients with a diagnosis of COVID-19 cases confirmed by polymerase chain reaction and were followed up in ICU-P between August 2021 and February 2022 with acute respiratory failure. The diagnosis of CAPA was based on the European Confederation of Medical Mycology (ECMM) and the International Society for Human and Animal Mycology 2020 (ECMM/ ISHAM) guideline. Galactomannan levels were determined using LFA and ELISA in serum samples taken simultaneously from the patients. RESULTS: Out of the 174 patients followed in the ICU-P, 56 did not meet any criteria for CAPA and were excluded from the analysis. The rate of patients diagnosed with proven CAPA was 5.7% (10 patients). A statistically significant result was obtained with LFA for the cut-off value of 0.5 ODI in the diagnosis of CAPA (p < 0.001). The same significant statistical relationship was found for the cut-off value of 1.0 ODI for the ELISA (p < 0.01). The sensitivity of LFA was 80% (95% CI: 0.55-1.05, p < 0.05), specificity 94% (95% CI: 0.89-0.98, p < 0.05); PPV 53% (95% CI: 0.28-0.79, p > 0.05) and NPV was 98% (95% CI: 0.95-1.01, p < 0.05). The risk of death was 1.66 (HR: 1.66, 95% CI: 1.02-2.86, p < 0.05) times higher in patients with an LFA result of ≥ 0.5 ODI than those with < 0.5 (p < 0.05). CONCLUSIONS: It is reckoned that LFA can be used in future clinical practice, particularly given its effectiveness in patients with hematological malignancies and accuracy in diagnosing CAPA.
Subject(s)
COVID-19 , Invasive Pulmonary Aspergillosis , Pulmonary Aspergillosis , Humans , COVID-19/diagnosis , Bronchoalveolar Lavage Fluid , Invasive Pulmonary Aspergillosis/diagnosis , Pandemics , Mycology , Pulmonary Aspergillosis/diagnosisABSTRACT
The article presents an AI-based fungi species recognition system for a citizen-science community. The system's real-time identification too - FungiVision - with a mobile application front-end, led to increased public interest in fungi, quadrupling the number of citizens collecting data. FungiVision, deployed with a human-in-the-loop, reaches nearly 93% accuracy. Using the collected data, we developed a novel fine-grained classification dataset - Danish Fungi 2020 (DF20) - with several unique characteristics: species-level labels, a small number of errors, and rich observation metadata. The dataset enables the testing of the ability to improve classification using metadata, e.g., time, location, habitat and substrate, facilitates classifier calibration testing and finally allows the study of the impact of the device settings on the classification performance. The continual flow of labelled data supports improvements of the online recognition system. Finally, we present a novel method for the fungi recognition service, based on a Vision Transformer architecture. Trained on DF20 and exploiting available metadata, it achieves a recognition error that is 46.75% lower than the current system. By providing a stream of labeled data in one direction, and an accuracy increase in the other, the collaboration creates a virtuous cycle helping both communities.
Subject(s)
Deep Learning , Mobile Applications , Fungi , Humans , Mycology , Neural Networks, ComputerABSTRACT
The incidence of fungal infections particularly Candida species, is increasing gradually as a result of the increased life expectancy associated with the advances in the diagnosis and treatment of diseases, and increased number of patients in the risk group over the years. In addition, the incidence of fungal infection types that are resistant to antifungal drugs has been increasing, and rare fungal species have been reported to be isolated more frequently. For this reason, it is indicated that identification to the species level will contribute to the early initiation of an accurate and effective treatment. In this study, it was aimed to define the Candida species isolated from various clinical specimens and to document the performance of antifungal sensitivity tests. The Candida isolates sent to the central mycology laboratory in 2019 for identification and antifungal susceptibility tests were included in the study. The definition of the fungi to the species level was carried out using matrix-assisted laser desorption ionization-time of fl ight mass spectrometry (MALDI-TOF MS) and conventional methods. In vitro antifungal drug susceptibilities were analyzed using the The Clinical and Laboratory Standarts Institute (CLSI, M27-A3) reference broth microdilution method. The minimum inhibitory concentration (MIC) results were interpreted in accordance with the species-specific clinical breakpoints (CBPs) cited in the CLSI-M60 guidelines, and according to the epidemiological cut-off value (ECV) when no CBP was mentioned. The distribution of the species of the total 813 Candida isolates included in the study were as follows: Candida albicans (n= 312 ), Candida parapsilosis (n= 202), Candida tropicalis (n= 92), Candida glabrata (n= 71), Candida dubliniensis (n=28), Candida lusitaniae (n= 26), Candida kefyr (n= 22), Candida utilis (n= 17), Candida krusei (n= 14), Candida orthopsilosis (n= 7), Candida inconspicua (n= 7), Candida guilliermondii (n= 5), Candida metapsilosis (n= 4), Candida norvegensis (n= 4), Candida lambica (n= 1) and Candida lipolytica (n= 1). The evaluation of the results of the antifungal susceptibility tests according to the CBPs revealed that one C.albicans isolate and 60 C.parapsilosis (29.7%) isolates were resistant, and seven C.parapsilosis (3.5%) isolates were dose-dependent susceptible to fluconazole; 32 C.parapsilosis (15.8%) isolates were intermediately susceptible to voriconazole; one C.parapsilosis (0.5%) was resistant and one C.krusei (7.1%) was intermediately susceptible to anidulafungin; and one C.parapsilosis (0.5%) was resistant and one C.krusei (7.1%) isolate was intermediately susceptible to micafungin. In terms of ECVs, one C.lusitaniae isolate for fluconazole and one of each C.lusitaniae and C.kefyr isolates were evaluated as a non-wild type. In the present study, 61 of 813 isolates were found to be resistant to fluconazole and seven were dose dependently susceptible, 32 were intermediately susceptible to voriconazole, one was resistant to anidulafungin, one was intermediately susceptible, and one was resistant to micafungin and one was intermediately susceptible to micafungin. In conclusion, the increased number of non- albicans Candida species and increased levels of resistance to antifungal drugs further establish the importance of early diagnosis at a species level alongside antifungal susceptibility tests.
Subject(s)
Antifungal Agents , Fluconazole , Anidulafungin/pharmacology , Antifungal Agents/pharmacology , Candida , Drug Resistance, Fungal , Fluconazole/pharmacology , Humans , Micafungin , Microbial Sensitivity Tests , Mycology , Voriconazole/pharmacologyABSTRACT
Arthropod-fungus interactions involving the Laboulbeniomycetes have been pondered for several hundred years. Early studies of Laboulbeniomycetes faced several uncertainties. Were they parasitic worms, red algal relatives, or fungi? If they were fungi, to which group did they belong? What was the nature of their interactions with their arthropod hosts? The historical misperceptions resulted from the extraordinary morphological features of these oddly constructed ectoparasitic fungi. More recently, molecular phylogenetic studies, in combination with a better understanding of life histories, have clearly placed these fungi among filamentous Ascomycota (subphylum Pezizomycotina). Species discovery and research on the classification of the group continue today as arthropods, and especially insects, are routinely collected and examined for the presence of Laboulbeniomycetes. Newly armed with molecular methods, mycologists are poisedto use Laboulbeniomycetes-insect associations as models for the study of a variety of basic evolutionary and ecological questions involving host-parasite relationships, modes of nutrient intake, population biology, host specificity, biological control, and invasion biology. Collaboration between mycologists and entomologists is essential to successfully advance knowledge of Laboulbeniomycetes and their intimate association with their hosts.
Subject(s)
Arthropods/microbiology , Ascomycota/physiology , Host-Parasite Interactions , Animals , Ascomycota/classification , Mycology , PhylogenyABSTRACT
BACKGROUND: Invasive scedosporiosis and lomentosporiosis are life-threatening fungal infections in immunocompromised patients with complex diagnostic and treatment patterns. OBJECTIVES: To develop a scoring tool to facilitate and quantify adherence to current guideline recommendations for diagnosis, treatment and follow-up of invasive scedosporiosis and lomentosporiosis. METHODS: Experts from European Confederation of Medical Mycology (ECMM) excellence centres reviewed current guidelines for scedosporiosis and lomentosporiosis. Recommendations for diagnosis, treatment and follow-up were summarized, assembled and weighted according to their strength of recommendation and level of evidence (strongly recommendedâ=â3 points; moderately recommendedâ=â2 points; marginally recommendedâ=â1 point; recommended againstâ=â0 points). Additional items considered of high importance for clinical management were also weighted. RESULTS: A total of 170 recommendations were identified. A 21-item tool was developed and embedded into the EQUAL score card. Nine items for diagnosis with 18 achievable points were assembled. For treatment, three general recommendation items with a maximal score of 9 were identified, while for specific antifungal treatment the two fungal pathogens were separated. Three and four items were established for scedosporiosis and lomentosporiosis, respectively, with a maximum achievable score of 3 due to the separation of different treatment options with the maximum point value of 3 for voriconazole-based treatment. Follow-up comprised two items (4 points maximum). Key recommendations for clinical outcome were weighted accordingly. CONCLUSIONS: We propose the EQUAL Score Scedosporiosis/Lomentosporiosis to quantify adherence to current guideline recommendations for management of these rare infections. The score remains to be validated in real-life patient cohorts and correlated with patient outcome.
Subject(s)
Invasive Fungal Infections , Mycology , Antifungal Agents/therapeutic use , Guideline Adherence , Humans , Invasive Fungal Infections/drug therapyABSTRACT
Starting late 2019, severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has caused a devastating global pandemic of coronavirus-19 disease (COVID-19) with â¼179 million cases and â¼3.9 million deaths to date. COVID-19 ranges from asymptomatic infection to severe illness with acute respiratory distress requiring critical care in up to 40% of hospitalized patients. Numerous reports have identified COVID-19-associated pulmonary aspergillosis (CAPA) as an important infective complication of COVID-19. In the UK, the pandemic has had unprecedented impacts on the National Health Service (NHS'): each wave of infections required hospitals to reconfigure for large surges in patients requiring intensive care, to the detriment of most aspects of non-COVID care including planned operations, outpatient appointments, general practitioner consultations and referrals. The UK National Mycology Reference Laboratory (MRL) offers a comprehensive service for the diagnosis and management of fungal disease nationwide, with a test portfolio that includes: diagnosis of allergies to fungal and other respiratory allergens; diagnosis of superficial and invasive/systemic fungal infections using traditional mycological, serological and molecular approaches; identification and susceptibility testing of the causative fungi; therapeutic drug monitoring of patients receiving antifungal therapy. Here, we describe the impact of the first 14 months of the COVID-19 pandemic on MRL activities. Changes to MRL workload closely mirrored many of the NHS-wide challenges, with marked reductions in 'elective' mycological activities unrelated to the pandemic and dramatic surges in tests that contributed to the diagnosis and management of COVID-19-related secondary fungal infections, in particular CAPA and candidemia in COVID-19 patients in intensive care. LAY SUMMARY: The COVID-19 pandemic has had an unprecedented impact on the UK National Health Service, with hospitals forced to repeatedly reconfigure to prepare for large surges in COVID-19 patients. Here we describe the impact of the first 14 months of the UK pandemic on the workload of the National Mycology Reference Laboratory.
Subject(s)
COVID-19 , Laboratories/statistics & numerical data , Mycology , Workload , Humans , Pandemics , State Medicine , United KingdomABSTRACT
Fungi critically impact the health and function of global ecosystems and economies. In Canada, fungal researchers often work within silos defined by subdiscipline and institutional type, complicating the collaborations necessary to understand the impacts fungi have on the environment, economy, and plant and animal health. Here, we announce the establishment of the Canadian Fungal Research Network (CanFunNet, https://fungalresearch.ca), whose mission is to strengthen and promote fungal research in Canada by facilitating dialogue among scientists. We summarize the challenges and opportunities for Canadian fungal research that were discussed at CanFunNet's inaugural meeting in 2019, and identify 4 priorities for our community: (i) increasing collaboration among scientists, (ii) studying diversity in the context of ecological disturbance, (iii) preserving culture collections in the absence of sustained funding, and (iv) leveraging diverse expertise to attract trainees. We have gathered additional information to support our recommendations, including a survey identifying underrepresentation of fungal-related courses at Canadian universities, a list of Canadian fungaria and culture collections, and a case study of a human fungal pathogen outbreak. We anticipate that these discussions will help prioritize fungal research in Canada, and we welcome all researchers to join this nationwide effort to enhance knowledge dissemination and funding advocacy.