Aureobasidium pullulans place among human pathogens opportunistic infections (literature review)

Багирова, Н. С.

doi:10.17116/labs20187212-18

Cited by 3 publications

(2 citation statements)

References 18 publications

(30 reference statements)

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“…Most of the tested cultures of fungi of the genus Aureobasidium (Dr 9-1, Dr 9-30, Dr 11-12, MR-12, etc.) showed the most pronounced sensitivity to nystatin and ketoconazole but were resistant to fluconazole, amphotericin B, and itraconazole, which does not coincide with the data on 150 clinical isolates [48,50], where itraconazole is recommended as an effective drug against Aureobasidium cultures. Unlike other tested isolates, Meyerozyma guilliermondii (MR-58) and Vishniacozyma victoriae (MR-135) strains were additionally sensitive to fluconazole; V. (Cryptococcus) heimaeyensis (Dr 10-13 and Dr 11-13) strains were sensitive to amphotericin B, as is typical for cryptococci.…”

Section: Discussioncontrasting

confidence: 82%

“…It is known that the melanin-producing black fungi Aureobasidium are capable of causing diseases; they are increasingly recognized as the causative agents of a wide variety of forms of human mycoses that are difficult to treat [48]; they are included in the list of more than 80 fungal genera associated with allergic reactions; and they are assigned to the 4th pathogenicity group [49]. The range of species of opportunistic fungi and bacteria that can cause human diseases and have polyresistance to antibiotic drugs is constantly expanding.…”

Section: Discussionmentioning

confidence: 99%

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Composition and Concentration of the Biogenic Components of the Aerosols Collected over Vasyugan Marshes and Karakan Pine Forest at Altitudes from 500 to 7000 m

et al. 2023

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The purpose of this study was to compare the concentration of total protein, as well as the composition and abundance of culturable microorganisms in atmospheric aerosols collected over the Vasyugan marshes and the Karakan pine forest during a flight in September 2018 at altitudes from 500 to 7000 m. The determined concentrations of total protein in Karakan samples were on average much less than those for the same area in September of other years. The concentration and composition of microorganisms in aerosol samples were determined by cultural methods and isolate genotyping. Altitude dependences of concentrations of total protein and culturable microorganisms were revealed. A rather stable altitude profile of culturable microorganism concentration was found over the Vasyugan marshes. No microorganisms were found at altitudes 4000 and 5500 m over the Karakan pine forest. Non-spore-bearing and spore-forming bacteria, as well as molds and yeast-like fungi, were isolated from aerosol samples. A high concentration of cosmopolitan psychrotolerant yeast Aureobasidium, capable of causing severe mycoses, and opportunistic bacteria Acinetobacter were found. A great similarity of composition and an atypically high abundance of non-spore-bearing bacteria and psychrotolerant yeast-like fungi were revealed in samples taken at altitudes of 1000 and 500 m in both studied regions, which may be a consequence of large-scale horizontal transport of layers of atmospheric air contaminated with microorganisms.

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Section: Discussioncontrasting

confidence: 82%

Section: Discussionmentioning

confidence: 99%

Composition and Concentration of the Biogenic Components of the Aerosols Collected over Vasyugan Marshes and Karakan Pine Forest at Altitudes from 500 to 7000 m

et al. 2023

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Saprophytic and Pathogenic Yeasts in Atmospheric Aerosols of Southwestern Siberia

et al. 2020

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Fungal Keratitis. Part 1. Etiomorphology, Historical Aspects, Epidemiology, Risk Factors, Pathogenesis and Clinical Features

Shilovskikh,

Ponomarev,

Timofeev

2023

Oftalʹmologiâ

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Fungal keratitis (FK) is 8–30 % in the structure of infectious inflammation of the cornea. There are 2 main types of mushroom growth — mycelial and yeast. Mycelial (mold) fungi grow in the form of special branched microscopic tubes — hyphae. Yeast fungi form compact colonies of individual oval cells. Due to the peculiarities of the yeast structure, the tendency to rapid spread in the tissues is reduced, which determines the less aggressive clinical course of such keratomycosis compared to mold. Until the 50s of the 20th century, the occurrence of FK in the world was low. However, probably with the introduction of corticosteroid and antibacterial drugs into medicine, their prevalence began to grow. The highest frequency of occurrence of FK is in regions with a hot climate and high involvement of the population in agriculture. The main provoking factor for the appearance of FK is corneal injury with damage to the epithelium and adhesion to the Bowman’s membrane or stroma components. Highly adhesive fungi (Aspergillus spp., Candida spp.) trigger a cascade of immune inflammatory reactions, production of reactive oxygen species and matrix metalloproteases-9, which leads to the destruction of lamellae. Fungi with low adhesive ability (Fusarium spp.) can grow parallel to lamellae for a long time and indefinitely without inducing pronounced inflammation. Symptoms of FC are similar to those observed in other forms of infectious keratitis, but more often they develop more slowly (5–10 days) and are less acute. A defect against the background of mycelial FC is more often characterized by jagged edges, a raised slough, and a non-yellow color. Yeast FK is manifested by oval ulceration of the epithelium with expanding, more sharply demarcated, densely focal suppuration.

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Aureobasidium pullulans place among human pathogens opportunistic infections (literature review)

Cited by 3 publications

References 18 publications

Composition and Concentration of the Biogenic Components of the Aerosols Collected over Vasyugan Marshes and Karakan Pine Forest at Altitudes from 500 to 7000 m

Composition and Concentration of the Biogenic Components of the Aerosols Collected over Vasyugan Marshes and Karakan Pine Forest at Altitudes from 500 to 7000 m

Saprophytic and Pathogenic Yeasts in Atmospheric Aerosols of Southwestern Siberia

Fungal Keratitis. Part 1. Etiomorphology, Historical Aspects, Epidemiology, Risk Factors, Pathogenesis and Clinical Features

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