Water quality and diversity of yeasts from tropical lakes and rivers from the Rio Doce basin in Southeastern Brazil

Medeiros, Adriana O.; Missagia, Beatriz S.; Brandão, Luciana R.; Callisto, Marcos; Barbosa, Francisco A. R.; Rosa, Carlos A.

doi:10.1590/s1517-83822012000400043

Cited by 38 publications

(19 citation statements)

References 11 publications

(15 reference statements)

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“…Studies by Biedunkiewicz et al conducted in lake pools in Szczecin and its surroundings, in Olsztyn and in an urban water main in Olsztyn confirm the necessity to use fungi as indicators, not only of water purity, but also as bioindicators of potential sanitary and epidemiological hazards . It is undisputed that yeast‐like fungi found in recreational waters may be harmful to human health . As potential aetiological factors of many mycoses, they present a direct risk to the users of water pools.…”

Section: Discussionmentioning

confidence: 99%

Microfungi Potentially Pathogenic for Humans Reported in Surface Waters Utilized for Recreation

Biedunkiewicz

Góralska

2016

CLEAN Soil Air Water

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Fungal infections are commonly reported among outdoor bathers. Recreational water reservoirs are an important element of the mycosis epidemiological chain in the biosphere because they can be a source of fungi from municipal wastes, of asymptomatic carriers or bathers carrying mycoses. Yeast-like fungi and moulds were isolated from samples of four surface water baths and five swimming pools in 2011-2012. Membrane filters and standard laboratory-based protocols were used to identify the isolated fungi. In total, 51 saprotrophic and potentially pathogenic species classified in the biosafety level-2 group were found. In one of the eutrophic lakes, a positive correlation was observed between the frequency of trading and the presence of coliform yeasts, while in the second, a correlation was found between the number of species of fungi and the presence of faecal streptococci. In swimming pool waters, the key factors that determined higher numbers of fungi were increased temperature, followed by low concentrations of chlorine ions. Together with the bacteriological and physicochemical analysis, constant mycological monitoring of recreational water (lake pools and swimming pools) should be a standard inspection element to reduce sanitary and epidemiologic risks to people using these water reservoirs for recreational purposes.

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Section: Discussionmentioning

confidence: 99%

Microfungi Potentially Pathogenic for Humans Reported in Surface Waters Utilized for Recreation

Biedunkiewicz

Góralska

2016

CLEAN Soil Air Water

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“…During the last 10 years, different water sources were identified as vectors for C. parapsilosis. Raw natural water, contaminated with C. parapsilosis, included streams [2], rivers [3], and groundwater [4]. Its presence positively correlated with the occurrence of dry season [3], the presence of middle-hard water type and nitrates [4,18,20].…”

Section: Water As a Vector For Transmission Of Candida Parapsilosis Imentioning

confidence: 99%

“…Raw natural water, contaminated with C. parapsilosis, included streams [2], rivers [3], and groundwater [4]. Its presence positively correlated with the occurrence of dry season [3], the presence of middle-hard water type and nitrates [4,18,20]. Due to its ability to withstand filtration and chlorination process [21], C. parapsilosis is one of the building blocks in biofilms within municipal water systems, with the number of yeast cells in a range of 3.1-4.6 CFU/cm 2 [22].…”

Section: Water As a Vector For Transmission Of Candida Parapsilosis Imentioning

confidence: 99%

“…Yeast Candida parapsilosis sensu stricto (Ascomycota, Saccharomycetes, Saccharomycetales, Debaryomycetaceae) is the most commonly isolated species from C. parapsilosis complex, followed by its closest relative C. orthopsilosis and C. metapsilosis [1]. Its primary natural habitat remains undefined to date although it was recently reported from different fresh water sources [2][3][4] as well as from pine trees [5]. On the other hand, the presence of C. parapsilosis in relation to humans is well documented [1,6].…”

Section: Introductionmentioning

confidence: 99%

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High Incidence of an Emerging Opportunistic PathogenCandida parapsilosisin Water-Related Domestic Environments

Zupančič¹,

Babič²,

Gunde‐Cimerman³

2019

Fungal Infection

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Candidiasis is one of the common fungal opportunistic infections, usually associated with diverse Candida species. Candida albicans, C. glabrata complex, C. parapsilosis complex, C. tropicalis and C. auris are often identified in affected patients. Candida parapsilosis sensu stricto is an emerging cause of hospital-acquired Candida infections, predominantly in Southern Europe, South America and Asia. Home environment is a less known source of infection despite frequent isolation of C. parapsilosis from kitchen surfaces and household appliances such as dishwashers, washing machines and refrigerators. C. parapsilosis is one of the first colonisers of novel dishwashers and a member of stable fungal communities on rubber seals worldwide in concentrations up to 10 2 CFU/cm 2. It colonises also drawers for detergents in washing machines and drainage channels in refrigerators. Tap water and groundwater act as vector for entrance of C. parapsilosis in the indoor environments. Within C. parapsilosis, four clinically relevant phenotypes can be distinguished. Experimental data on the prevalence of C. parapsilosis isolates phenotypes, obtained from indoor environments, will be presented. Smooth phenotype prevails in dishwashers and washing machines, while crepe and crater dominate in water. In conclusion, the ability to colonise diverse environments and accordingly switch phenotypes defines C. parapsilosis as a versatile, domestic environment-related opportunistic pathogen.

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confidence: 99%

First Case of Nosocomial Fungemia Caused by Candida melibiosica

et al. 2020

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Dear Editor, Candida melibiosica is an unusual Candida species often isolated from rivers, oceans, and some traditional beers [1][2][3]. Human infection caused by this organism has never been described. We report a case of nosocomial fungemia by C. melibiosica in an intensive care unit (ICU) patient. To our knowledge, this is the first report to demonstrate that C. melibiosica causes nosocomial fungemia and can act as a human pathogen. This study was approved by the Institutional Review Board of Chonnam National University Hospital, Gwangju, Korea (IRB CNUH-2014-290). A waiver of consent was granted as the study is retrospective in nature.In December 2010, an 82-year-old man was admitted to emergency room of Chonnam National University Hospital owing to altered mental status. He suffered from aspiration pneumonia and hypoxic brain damage due to asphyxia. He had no known underlying disease. The patient was diagnosed as having nosocomial fungemia because the same yeast was repeatedly isolated from blood cultures collected on days 12, 15, 17, 18, and 22 of his 39 days of hospital stay. Once transferred to the ICU on day 2, he was treated with tazobactam/piperacillin for 11 days, intravenous nutrition via central venous catheter (CVC) for 17 days, and mechanical ventilation for 38 days. On day 12, he developed an intermittent fever (temperature, 37.8-38.8°C) that persisted for 13 days. His leukocyte count and serum C-reactive protein level on day 12 were 14.5 × 10 9 /L (neutrophil count 12.9 × 10 9 /L) and 1,296.2 nmol/L, respectively. The blood cultures were performed using about 10 mL of peripheral blood (PB) or catheter-drawn blood (CB). Nine of the 10 blood culture sets obtained from days 12 (one PB and one CB), 15 (two PB), 17 (one PB and one CB), 18 (two PB), and 22 (one of two PBs) yielded yeast isolates with the same microscopic and colony morphological findings (Table 1). Fluconazole therapy (100 mg/day) was started on day 15, and the CVC was removed on day 18. A culture of the removed CVC tip was negative, and the blood culture became negative on day 27. The patient's condition improved, and he was transferred to another hospital.Two isolates obtained on days 12 and 17 of the patient's hospital stay were analyzed by sequencing of the large-subunit rRNA gene (D1-D2 region); BLAST search results indicated a

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Water quality and diversity of yeasts from tropical lakes and rivers from the Rio Doce basin in Southeastern Brazil

Cited by 38 publications

References 11 publications

Microfungi Potentially Pathogenic for Humans Reported in Surface Waters Utilized for Recreation

Microfungi Potentially Pathogenic for Humans Reported in Surface Waters Utilized for Recreation

High Incidence of an Emerging Opportunistic PathogenCandida parapsilosisin Water-Related Domestic Environments

First Case of Nosocomial Fungemia Caused by Candida melibiosica

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