Fungal Infection
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2022 ◽  
Vol 46 (1) ◽  
Author(s):  
Humayun Kabir ◽  
Md. Kamrul Hasan ◽  
Mamunur Rahman ◽  
Shimpi Akter ◽  
Golam Ishraque Chowdhury ◽  
...  

Abstract Background Mucormycosis, a severe fungal infection, is an emerging public health concern during the COVID-19 pandemic. This study aimed to investigate the perception of mucormycosis among Bangladeshi healthcare workers. Results An exploratory cross-sectional study was carried out among the Bangladeshi healthcare workers from May 25, 2021, to June 5, 2021. The study found 422 responses from the healthcare workers of Bangladesh. Among the respondents, nearly half of them (45.26%) were doctors (n = 191). This study explored that the healthcare workers’ mucormycosis perception scores were significantly associated with their age, gender, profession, monthly income, marital status, job type, and death of friends and family members due to COVID-19. Conclusions This study emphasized the healthcare workers’ mucormycosis perception along with other associated factors. The findings could help policymakers to mitigate mucormycosis and related infectious diseases emergencies in the post-COVID-19 situation.


2022 ◽  
Author(s):  
Camille Danne ◽  
Chloe Michaudel ◽  
Jurate Skerniskyte ◽  
Julien Planchais ◽  
Aurelie Magniez ◽  
...  

Objectives: Inflammatory bowel disease (IBD) results from a combination of genetic predisposition, dysbiosis of the gut microbiota and environmental factors, leading to alterations in the gastrointestinal immune response and chronic inflammation. Caspase recruitment domain 9 (Card9), one of the IBD susceptibility genes, has been shown to protect against intestinal inflammation and fungal infection. However, the cell types and mechanisms involved in the CARD9 protective role against inflammation remain unknown. Design: We used dextran sulfate sodium (DSS)-induced and adoptive transfer colitis models in total and conditional CARD9 knock-out mice to uncover which cell types play a role in the CARD9 protective phenotype. The impact of Card9 deletion on neutrophil function was assessed by an in vivo model of fungal infection and various functional assays, including endpoint dilution assay, apoptosis assay by flow cytometry, proteomics and real time bioenergetic profile analysis (Seahorse). Results: Lymphocytes are not intrinsically involved in the CARD9 protective role against colitis. CARD9 expression in neutrophils, but not in epithelial or CD11c+ cells, protects against DSS-induced colitis. In the absence of CARD9, mitochondrial dysfunction in neutrophils leads to their premature death through apoptosis, especially in oxidative environment. The decrease of fonctional neutrophils in tissues could explain the impaired containment of fungi and increased susceptibility to intestinal inflammation. Conclusion: These results provide new insight into the role of CARD9 in neutrophil mitochondrial function and its involvement in intestinal inflammation, paving the way for new therapeutic strategies targeting neutrophils.


2022 ◽  
pp. 201010582210741
Author(s):  
Chee Yik Chang ◽  
Yi Lung Gan ◽  
Fatin Izni Zamri ◽  
Anuradha P. Radhakrishnan

Mucormycosis is an aggressive and potentially fatal fungal infection caused by fungi of the order Mucorales. There has been an increase in the number of cases of rhino-orbital mucormycosis in people with COVID-19, particularly in India. Rhino-orbital-cerebral mucormycosis is the most common manifestation of mucormycosis associated with COVID-19. We report the first case of rhino-orbital mucormycosis in a diabetic patient with SARS-CoV-2 infection in Malaysia. The diagnosis of mucormycosis was confirmed by histopathological examination, but the fungal culture and PCR results were negative. He was treated with antifungal therapy and had extensive debridement. Treatment of mucormycosis requires a multidisciplinary approach that includes addressing underlying risk factors, effective antifungal therapy, and surgical debridement.


2022 ◽  
Vol 8 ◽  
Author(s):  
Katarzyna Guziejko ◽  
Katarzyna Klukowska ◽  
Urszula Budzińska ◽  
Robert Marek Mróz

Background: Chronic pulmonary aspergillosis (CPA) is a rare complication of radiochemotherapy for lung cancer. It may develop months or years after radical treatment. The diagnosis of CPA is challenging and complex. Not only fungal infection but also cancer relapse always have to be taken under consideration. Antifungal therapy is the base treatment, especially in the case when a surgical procedure is not possible. Standard treatment for at least 6 months is recommended but the optimal duration of the antifungal therapy is unknown. We present the clinical case of CPA, in which we had to perform multidirectional diagnostic tests to confirm the diagnosis and modified treatment due to the recurrence of the disease.Case Presentation: We report a patient who developed CPA three and a half years after concurrent radiochemotherapy for locally advanced non-small-cell lung cancer. Non-specific symptoms were the cause of delayed diagnosis of fungal infection. Samples collected during bronchoscopy allowed to exclude the recurrence of lung cancer and establish the diagnosis of CPA. The patient was treated with itraconazole for 6 months. A few months later, controlled chest CT scans revealed the progression of CPA. Initially, retreatment with itraconazole was implemented. Due to the progression of fungal infection, voriconazole was used in the second line of treatment. Unfortunately, this therapy was complicated by the side effects and deterioration of the patient's condition. The reintroduction of itraconazole resulted in clinical and radiological improvement. Treatment is scheduled for at least 12 months.Conclusion: Chronic pulmonary aspergillosis (CPA) was the cause of clinical deterioration and radiological progression in a patient after the radical treatment of lung cancer. In the described case, the diagnosis of CPA was delayed because of the suspicion of the recurrence of lung cancer. As the surgery was not possible, antifungal therapy with itraconazole was implemented and the proper dosage and duration led to significant clinical improvement.


2022 ◽  
Author(s):  
Rajesh Verma ◽  
Rajarshi Chakraborty ◽  
Keerthiraj DB

Abstract Rhino-orbital cerebral mucormycosis has increased in the recent second wave of post-Covid-19 illness, mainly in tropical countries like India. The burden of diabetes mellitus and rampant use of corticosteroid, environmental factors, post-covid-19 immunological derangement might be contributory factors to the development of extensive outbreak of ROCM. Cerebrospinal fluid rhinorrhea is rarely documented with such fungal infection in literature. This case report described a 45-year diabetic woman in the post-Covid-19 phase,who developed rhino-orbital cerebral mucormycosis, presenting with spontaneous cerebrospinal fluid rhinorrhea.


2022 ◽  
Author(s):  
xiaopo wang ◽  
Shiqi Ling ◽  
Guanzhao Liang ◽  
Jianfang Sun

Abstract Diabetes mellitus considered to represent an immunodeficient state significantly predisposes patients to all types of opportunistic invasive fungal infection. However, very few cases of cutaneous alternariosis associated with diabetes have been reported previously. Herein, we describe a rare case of cutaneous alternariosis in an elderly diabetic patient with antecedent local trauma.


Antibiotics ◽  
2022 ◽  
Vol 11 (1) ◽  
pp. 72
Author(s):  
Laura Mena ◽  
Muriel Billamboz ◽  
Rogatien Charlet ◽  
Bérangère Desprès ◽  
Boualem Sendid ◽  
...  

Candidiasis, caused by the opportunistic yeast Candida albicans, is the most common fungal infection today. Resistance of C. albicans to current antifungal drugs has emerged over the past decade leading to the need for novel antifungal agents. Our aim was to select new antifungal compounds by library-screening methods and to assess their antifungal effects against C. albicans. After screening 90 potential antifungal compounds from JUNIA, a chemical library, two compounds, 1-(4-chlorophenyl)-4-((4-chlorophenyl)amino)-3,6-dimethylpyridin-2(1H)-one (PYR) and (Z)-N-(2-(4,6-dimethoxy-1,3,5-triazin-2-yl)vinyl)-4-methoxyaniline (TRI), were identified as having potential antifungal activity. Treatment with PYR and TRI resulted in a significant reduction of C. albicans bioluminescence as well as the number of fungal colonies, indicating rapid fungicidal activity. These two compounds were also effective against clinically isolated fluconazole- or caspofungin-resistant C. albicans strains. PYR and TRI had an inhibitory effect on Candida biofilm formation and reduced the thickness of the mannan cell wall. In a Caenorhabditis elegans infection model, PYR and TRI decreased the mortality of nematodes infected with C. albicans and enhanced the expression of antimicrobial genes that promote C. albicans elimination. Overall, PYR and TRI showed antifungal properties against C. albicans by exerting fungicidal activities and enhancing the antimicrobial gene expression of Caenorhabditis elegans.


Author(s):  
Maria Eduarda Farias ◽  
Monique Freire Santana ◽  
Luiz Ferreira ◽  
Mayla Borba ◽  
João Silva-Neto ◽  
...  

Between April and July 2020, and, therefore, prior to the broad recommendation of corticosteroids for severe COVID-19, a total of 50 full autopsies were performed in Manaus. We confirmed two invasive cases of aspergillosis through histopathology and gene sequencing (4%) in our autopsy series. The confirmed invasive aspergillosis incidence seems much lower than expected based on the “probable and possible” definitions, and an individualized approach should be considered for each country scenario. Interestingly, a prolonged length of stay in the intensive care unit was not observed in any of the cases. Timely diagnosis and treatment of fungal infection can reduce mortality rates.


ADMET & DMPK ◽  
2022 ◽  
Author(s):  
Balbina Plotkin ◽  
Monika Konaklieva

An obstacle to drug development, particularly in this era of multiple drug resistance, is the under-appreciation for the role the host environment plays in microbial response to drugs. With the rise in fungal infection and drug resistance, particularly in individuals with co-morbidities, the influence serum and its components have on antimicrobial susceptibility requires assessment. This study examined the impact of physiologically relevant glucose and insulin levels in the presence and absence of 50 % human plasma on MICs for clinical isolates of Candida lusitaniae, Candida parapsilosis, Candida albicans, Candida tropicalis, Candida glabrata, Candida krusei and Cryptococcus neoformans. The addition of insulin or glucose at physiologic levels in RPMI medium alone altered the MIC in either a positive or negative fashion, depending on the organisms and drug tested, with C. glabrata most significantly altered with a 40, >32- and 46-fold increase in MIC for amphotericin B, itraconazole and miconazole, respectively. The addition of candida-antibody negative plasma also affected MIC, with the addition of glucose and insulin having a tandem effect on MIC. These findings indicate that phenotypic resistance of Candida and Cryptococcus can vary depending on the presence of insulin with glucose and plasma. This modulation of resistance may help explain treatment failures in the diabetic population and facilitate the development of stable drug-resistant strains. Furthermore, these findings indicate the need for a precision approach in the choice of drug treatment and drug development.


Author(s):  
Roopak Dubey ◽  
Kamal Kumar Sen ◽  
Sudhansu Sekhar Mohanty ◽  
Sangram Panda ◽  
Mayank Goyal ◽  
...  

Abstract Background The occurrence of invasive fungal infections in COVID-19 patients is on surge in countries like India. Several reports related to rhino-nasal-sinus mucormycosis in COVID patients have been published in recent times; however, very less has been reported about invasive pulmonary fungal infections caused mainly by mucor, aspergillus or invasive candida species. We aimed to present 6 sputum culture proved cases of invasive pulmonary fungal infection (four mucormycosis and two invasive candidiasis) in COVID patients, the clues for the diagnosis of fungal invasion as well as difficulties in diagnosing it due to superimposed COVID imaging features. Case presentation The HRCT imaging features of the all 6 patients showed signs of fungal invasion in the form of cavities formation in the pre-existing reverse halo lesions or development of new irregular margined soft tissue attenuating growth within the pre-existing or in newly formed cavities. Five out of six patients were diabetics. Cavities in cases 1, 2, 3 and 4 of mucormycosis were aggressive and relatively larger and showed relatively faster progression into cavities in comparison with cases 5 and 6 of invasive candidiasis. Conclusion In poorly managed diabetics or with other immunosuppressed conditions, invasive fungal infection (mucormycosis, invasive aspergillosis and invasive candidiasis) should be considered in the differential diagnosis of cavitary lung lesions.


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