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The Lancet. Infectious Diseases Sep 2004Tropical eumycetoma is frequently caused by the fungus Madurella mycetomatis. The disease is characterised by extensive subcutaneous masses, usually with sinuses... (Review)
Review
Tropical eumycetoma is frequently caused by the fungus Madurella mycetomatis. The disease is characterised by extensive subcutaneous masses, usually with sinuses draining pus, blood, and fungal grains. The disease affects individuals of all ages, although disability is most severe in adults who work outdoors. Compared with major diseases such as tuberculosis, malaria, and HIV, disease from M mycetomatis is underestimated but socioeconomically important. Many scientific case reports on mycetoma exist, but fundamental research was lacking until recently. We present a review on developments in the clinical, epidemiological, and diagnostic management of M mycetomatis eumycetoma. We describe newly developed molecular diagnostic and gene typing procedures, and their application for management of patients and environmental research. Fungal susceptibility tests have been developed as well as a mouse model of infection. These advances should greatly further our understanding of the molecular basis of eumycetoma.
Topics: Animals; Antifungal Agents; Humans; Immunocompetence; Madurella; Microbial Sensitivity Tests; Mycetoma; Risk Factors; Soil Microbiology
PubMed: 15336224
DOI: 10.1016/S1473-3099(04)01131-4 -
Chemistry & Biodiversity May 2023Eumycetoma, the fungal form of the neglected tropical disease mycetoma, is a crippling infectious disease with low response rates to currently available antifungal...
Eumycetoma, the fungal form of the neglected tropical disease mycetoma, is a crippling infectious disease with low response rates to currently available antifungal drugs. In this study, a series of natural naphthoquinones and anthraquinones was evaluated for their activity against Madurella mycetomatis, which is the most common causative agent of eumycetoma. The metabolic activity of Madurella mycetomatis as well as the viability of Galleria mellonella larvae upon treatment with quinones was investigated. Several hydroxy-substituted naphthoquinones exhibited activity against Madurella mycetomatis. In particular, naphthazarin (5,8-dihydroxy-1,4-naphthoquinone) was identified as a considerably active antifungal compound against Madurella mycetomatis (IC =1.4 μM), while it showed reduced toxicity to Galleria mellonella larvae, which is a well-established in vivo invertebrate model for mycetoma drug studies.
Topics: Animals; Antifungal Agents; Mycetoma; Madurella; Anthraquinones; Larva; Moths; Naphthoquinones; Coleoptera
PubMed: 37067830
DOI: 10.1002/cbdv.202300151 -
Revista Espanola de Quimioterapia :... Dec 2022
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PLoS Neglected Tropical Diseases Jun 2014The current treatment of eumycetoma utilizing ketoconazole is unsatisfactory because of high recurrence rates, which often leads to complications and unnecessary... (Comparative Study)
Comparative Study
The current treatment of eumycetoma utilizing ketoconazole is unsatisfactory because of high recurrence rates, which often leads to complications and unnecessary amputations, and its comparatively high cost in endemic areas. Hence, an effective and affordable drug is required to improve therapeutic outcome. E1224 is a potent orally available, broad-spectrum triazole currently being developed for the treatment of Chagas disease. E1224 is a prodrug that is rapidly converted to ravuconazole. Plasma levels of E1224 are low and transient, and its therapeutically active moiety, ravuconazole is therapeutically active. In the present study, the in vitro activity of ravuconazole against Madurella mycetomatis, the most common etiologic agent of eumycetoma, was evaluated and compared to that of ketoconazole and itraconazole. Ravuconazole showed excellent activity with MICs ranging between ≤ 0.002 and 0.031 µg/ml, which were significantly lower than the MICs reported for ketoconazole and itraconazole. On the basis of our findings, E1224 with its resultant active moiety, ravuconazole, could be an effective and affordable therapeutic option for the treatment of eumycetoma.
Topics: Antifungal Agents; Itraconazole; Ketoconazole; Madurella; Microbial Sensitivity Tests; Thiazoles; Triazoles
PubMed: 24945848
DOI: 10.1371/journal.pntd.0002942 -
Transactions of the Royal Society of... May 2016Though serodiagnosis of actinomycetoma is established, that of eumycetoma due to Madurella mycetomatis is limited because of lack of pure antigen. Reliable rapid tests...
BACKGROUND
Though serodiagnosis of actinomycetoma is established, that of eumycetoma due to Madurella mycetomatis is limited because of lack of pure antigen. Reliable rapid tests are needed to make an accurate timely diagnosis. The purpose of this study is to detect antigen parts of M. mycetomatis, which act specifically with M. mycetomatis antibodies.
METHODS
Cytoplasmic antigen was prepared from molecularly identified cultures of M. mycetomatis by sonication, ultracentrifugation, dried, weighed and appropriately reconstituted. M. mycetomatis cytoplasmic antigen were separated using 12% sodium dodecyl sulfate-polyacrylamide gel, and immunoblotting to detect the reactive ones.Immunoblotting was carried out in nitrocellulose strips containing different molecular size. Sera from patients and co-patients as control were used.
RESULTS
When stained with Coomassie brilliant blue R 250 seven molecular weights appeared but only three, 45, 60, 95 kDa reacted with M. mycetomatis patients few from control group, one from a malaria patient. No reactive band was observed with sera from actinomycetoma, Aspergillus flavus-associated aspergillosis, schistosomiasis, leishmaniasis, fungal sinusitis nor healthy controls.
CONCLUSIONS
Specific fractions of M. mycetomatis antigen which were demonstrated by immunoblotting showed 75% sensitivity and 95% specificity. The true negative tests were 14 patients (32.5%). This also means that immunoblotting is reasonably reliable in diagnosis and follow-up of eumycetoma patients.
Topics: Antibodies, Fungal; Antigens, Fungal; Collodion; Humans; Immunoblotting; Madurella; Molecular Weight; Mycetoma; Mycoses; Rosaniline Dyes; Sensitivity and Specificity; Serotyping
PubMed: 27198216
DOI: 10.1093/trstmh/trw023 -
PLoS Neglected Tropical Diseases Mar 2021Mycetoma is a neglected tropical disease which is endemic in Senegal. Although this subcutaneous mycosis is most commonly found on the foot, extrapodal localisations...
Mycetoma is a neglected tropical disease which is endemic in Senegal. Although this subcutaneous mycosis is most commonly found on the foot, extrapodal localisations have also been found, including on the leg, knee, thigh, hand, and arm. To our knowledge, no case of blood-spread eumycetoma has been reported in Senegal. Here, we report a case of pulmonary mycetoma secondary to a Madurella mycetomatis knee eumycetoma. The patient was a 41-year-old farmer living in Louga, Senegal, where the Sudano-Sahelian climate is characterised by a short and unstable rainy season and a steppe vegetation. He suffered a trauma to the right more than 20 years previously and had received treatment for more than 10 years with traditional medicine. He consulted at Le Dantec University Hospital in Dakar for treatment of a right knee mycetoma which had been diagnosed more than 10 years ago. He had experienced a chronic cough for more than a year; tuberculosis documentation was negative. Grains collected from the knee and the sputum isolated M. mycetomatis, confirmed by the rRNA gene ITS regions nucleotide sequence analysis. An amputation above the knee was performed, and antibacterial and antifungal therapy was started with amoxicillin-clavulanic acid and terbinafine. The patient died within a month of his discharge from hospital.
Topics: Adult; Fatal Outcome; Humans; Knee; Knee Injuries; Lung Diseases, Fungal; Madurella; Mycetoma; Senegal
PubMed: 33764976
DOI: 10.1371/journal.pntd.0009238 -
PLoS Neglected Tropical Diseases Nov 2022Madurella mycetomatis is one of the main causative agents of mycetoma, a debilitating neglected tropical disease. Improved understanding of the genomic diversity of the...
Madurella mycetomatis is one of the main causative agents of mycetoma, a debilitating neglected tropical disease. Improved understanding of the genomic diversity of the fungal and bacterial causes of mycetoma is essential to advances in diagnosis and treatment. Here, we describe a high-quality genome assembly of M. mycetomatis and results of the whole genome sequence analysis of 26 isolates from Sudan. We demonstrate evidence of at least seven genetically diverse lineages and extreme clonality among isolates within these lineages. We also performed shotgun metagenomic analysis of DNA extracted from mycetoma grains and showed that M. mycetomatis reads were detected in all sequenced samples with the average of 11,317 reads (s.d. +/- 21,269) per sample. In addition, 10 (12%) of the 81 tested grain samples contained bacterial reads including Streptococcus sp., Staphylococcus sp. and others.
Topics: Humans; Madurella; Mycetoma; Sudan; Metagenomics; Genomics; Neglected Diseases
PubMed: 36322569
DOI: 10.1371/journal.pntd.0010787 -
Madurella mycetomatis infection of the buttock in an Eritrean refugee in Switzerland: a case report.Journal of Medical Case Reports Feb 2019Mycetoma is a neglected infectious disease caused by a fungus (eumycetoma) or bacteria (actinomycetoma); it is characterized by chronic local inflammation with sinus...
BACKGROUND
Mycetoma is a neglected infectious disease caused by a fungus (eumycetoma) or bacteria (actinomycetoma); it is characterized by chronic local inflammation with sinus formation and purulent discharge. Its course can be quite devastating because of the difficulty in diagnosing the infection and in eliminating the causative agent. Although endemic in many countries in the tropics and subtropics, the migration of Africans to Europe may increase the presence of this neglected disease in European countries. We present a case of an Eritrean patient living in a non-endemic country who was diagnosed as having an infection of Madurella mycetomatis in an atypical location in his body.
CASE PRESENTATION
We report the case of a 35-year-old African male refugee from Eritrea, living in Switzerland since 2015, who presented with a 1-year history of a painful soft tissue swelling associated with dark nodules in his right buttock. He mentioned having several previous surgeries after 2001 while he was in Eritrea due to recurrent abscess formation on this body area. In the previous months, the swelling had become more significant and nodules started draining a purulent fluid. An initial diagnostic hypothesis of buttock abscess was made and he was referred to a dermatologist for diagnostic confirmation and further specialist care due to the size and atypical presentation. After a punch biopsy, the diagnosis of eumycetoma was confirmed and cultures developed Madurella mycetomatis. The initial treatment approach consisted of oral treatment by itraconazole; however, a surgical resection of the lesions was finally needed.
CONCLUSIONS
Although rare, mycetoma should be diagnosed as early as possible to avoid long-lasting complications. Primary care physicians in European countries are frequently in the first line of care of migrant patients and therefore should be aware of the common and uncommon clinical presentations of mycetoma.
Topics: Adult; Antifungal Agents; Biopsy; Buttocks; Eritrea; Humans; Itraconazole; Madurella; Male; Mycetoma; Refugees; Switzerland
PubMed: 30755254
DOI: 10.1186/s13256-018-1962-y -
PLoS Neglected Tropical Diseases 2015Eumycetoma is a chronic granulomatous subcutaneous infectious disease, endemic in tropical and subtropical regions and most commonly caused by the fungus Madurella...
Eumycetoma is a chronic granulomatous subcutaneous infectious disease, endemic in tropical and subtropical regions and most commonly caused by the fungus Madurella mycetomatis. Interestingly, although grain formation is key in mycetoma, its formation process and its susceptibility towards antifungal agents are not well understood. This is because grain formation cannot be induced in vitro; a mammalian host is necessary to induce its formation. Until now, invertebrate hosts were never used to study grain formation in M. mycetomatis. In this study we determined if larvae of the greater wax moth Galleria mellonella could be used to induce grain formation when infected with M. mycetomatis. Three different M. mycetomatis strains were selected and three different inocula for each strain were used to infect G. mellonella larvae, ranging from 0.04 mg/larvae to 4 mg/larvae. Larvae were monitored for 10 days. It appeared that most larvae survived the lowest inoculum, but at the highest inoculum all larvae died within the 10 day observation period. At all inocula tested, grains were formed within 4 hours after infection. The grains produced in the larvae resembled those formed in human and in mammalian hosts. In conclusion, the M. mycetomatis grain model in G. mellonella larvae described here could serve as a useful model to study the grain formation and therapeutic responses towards antifungal agents in the future.
Topics: Animals; Disease Models, Animal; Female; Humans; Hyphae; Larva; Madurella; Male; Moths; Mycetoma
PubMed: 26173126
DOI: 10.1371/journal.pntd.0003926