Magnusiomyces capitatus, an Unusual Cause of Invasive Fungal Infections in Neutropenic Patients: Case Reports and Outbreak Investigation.

Magnusiomyces capitatus is an environmental fungus found in soil, water, air, plants, and dairy products which may cause opportunistic infections in patients with haematological disorders resulting in high mortality rates. This series of the first reported cases in Ireland discusses investigation of two patients with underlying haematological disorders, hospitalised in the Irish National Adult Stem Cell Transplant Unit (NASCTU), who developed line-related fungaemias with M. capitatus within a three-month period.

Serum antigen tests for the diagnosis of invasive aspergillosis: a retrospective comparison of five antigen assays and one beta-D-glucan assay.

Invasive aspergillosis (IA) is a life-threatening infection. Early and specific diagnosis is pivotal to ensure adequate therapy. Antigen testing from blood is a widespread and convenient diagnostic approach.

Toxic eburicol accumulation drives the antifungal activity of azoles against Aspergillus fumigatus.

Azole antifungals inhibit the sterol C14-demethylase (CYP51/Erg11) of the ergosterol biosynthesis pathway. Here we show that the azole-induced synthesis of fungicidal cell wall carbohydrate patches in the pathogenic mold Aspergillus fumigatus strictly correlates with the accumulation of the CYP51 substrate eburicol. A lack of other essential ergosterol biosynthesis enzymes, such as sterol C24-methyltransferase (Erg6A), squalene synthase (Erg9) or squalene epoxidase (Erg1) does not trigger comparable cell wall alterations.

Only One of Three Bcs1 Homologs in Confers Respiratory Growth.

The mitochondrial translocase Bcs1 is required for the correct assembly of complex III of the mitochondrial respiratory chain. Because of its importance, Bcs1 was recently proposed as a target for antifungal agents. The function of this AAA (ATPase Associated with diverse cellular Activities) protein has been extensively characterized in .

Investigation of genomic mutations and their association with phenotypic resistance to new and repurposed drugs in Mycobacterium tuberculosis complex clinical isolates.

Background: WGS has the potential to detect resistance-associated mutations and guide treatment of MDR TB. However, the knowledge base to confidently interpret mutations associated with the new and repurposed drugs is sparse, and phenotypic drug susceptibility testing is required to detect resistance.

Methods: We screened 900 Mycobacterium tuberculosis complex genomes from Ireland, a low TB incidence country, for mutations in 13 candidate genes and assessed their association with phenotypic resistance to bedaquiline, clofazimine, linezolid, delamanid and pretomanid.