Molecular epidemiology and antifungal susceptibility of Saprochaete capitata (Blastoschizomyces capitatus) isolates causing nosocomial infection in Kayseri/Turkey

2016 ◽  
Vol 48 (8) ◽  
pp. 596-603 ◽  
Author(s):  
A. Nedret Koç ◽  
M. Altay Atalay ◽  
Demet Timur ◽  
Gonca Demir ◽  
Leylagül Kaynar
2021 ◽  
Vol 7 (6) ◽  
pp. 419
Author(s):  
Maria Siopi ◽  
Ioanna Efstathiou ◽  
Konstantinos Theodoropoulos ◽  
Spyros Pournaras ◽  
Joseph Meletiadis

Trichophyton isolates with reduced susceptibility to antifungals are now increasingly reported worldwide. We therefore studied the molecular epidemiology and the in vitro antifungal susceptibility patterns of Greek Trichophyton isolates over the last 10 years with the newly released EUCAST reference method for dermatophytes. Literature was reviewed to assess the global burden of antifungal resistance in Trichophyton spp. The in vitro susceptibility of 112 Trichophyton spp. molecularly identified clinical isolates (70 T. rubrum, 24 T. mentagrophytes, 12 T. interdigitale and 6 T. tonsurans) was tested against terbinafine, itraconazole, voriconazole and amorolfine (EUCAST E.DEF 11.0). Isolates were genotyped based on the internal transcribed spacer (ITS) sequences and the target gene squalene epoxidase (SQLE) was sequenced for isolates with reduced susceptibility to terbinafine. All T. rubrum, T. interdigitale and T. tonsurans isolates were classified as wild-type (WT) to all antifungals, whereas 9/24 (37.5%) T. mentagrophytes strains displayed elevated terbinafine MICs (0.25–8 mg/L) but not to azoles and amorolfine. All T. interdigitale isolates belonged to ITS Type II, while T. mentagrophytes isolates belonged to ITS Type III* (n = 11), VIII (n = 9) and VII (n = 4). All non-WT T. mentagrophytes isolates belonged to Indian Genotype VIII and harbored Leu393Ser (n = 5) and Phe397Leu (n = 4) SQLE mutations. Terbinafine resistance rates ranged globally from 0–44% for T. rubrum and 0–76% for T. interdigitale/T. mentagrophytes with strong endemicity. High incidence (37.5%) of terbinafine non-WT T. mentagrophytes isolates (all belonging to ITS Type VIII) without cross-resistance to other antifungals was found for the first time in Greece. This finding must alarm for susceptibility testing of dermatophytes at a local scale particularly in non-responding dermatophytoses.


2020 ◽  
Author(s):  
Mohammad Kord ◽  
Mohammadreza Salehi ◽  
Seyed Jamal Hashemi ◽  
Sassan Rezaie ◽  
Ayda Maleki ◽  
...  

Abstract Background Candidemia is a major cause of morbidity and mortality among patients receiving immunosuppressive therapy and those hospitalized with serious underlying diseases despite the commencement of antifungal therapy. We investigated the molecular epidemiology, clinical characteristics, comorbidity risk factors, species distribution, antifungal susceptibility profile, and outcome of candidemia to provide appropriate perspectives in Tehran, Iran. Methods A prospective observational study of all patients diagnosed with candidemia was performed at two referral teaching hospitals in Tehran. Demographic characteristics, underlying diseases, risk factors, clinical symptoms, and laboratory analyses were mined. Results One-hundred and fifty-two Candida isolates from 89 patients with candidemia were recovered. The overall crude mortality was 47.2%. The most common underlying disease was sepsis (48.3%) followed by malignancy (46.1%), renal failure/ dialysis (43.8%), and Hypertension (40.0%). C. albicans (43.8%) was the most frequent causative agent followed by C. glabrata (21.3%), C. parapsilosis complex (15.7%), C. tropicalis (11.2%), and C. lusitaniae (3.4%). Result of antifungal susceptibility test show that activity of all the four azole antifungal agents was low against non-albicans Candida species, especially C. tropicalis. Conclusion Increase in non-albicans Candida species with reduced susceptibility to antifungal drugs might be alarming in high-risk patients. Therefore, accurate knowledge of predisposing factors and epidemiological patterns in candidemia are effective steps for managing and decreasing the mortality rate in candidemia.


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