Molecular identification and extracellular enzyme production of Rhodotorula spp.

dc.contributor.authorPumeesat P.
dc.contributor.authorNasom L.
dc.contributor.authorThongdee K.
dc.contributor.authorDamnak T.
dc.contributor.authorSirikhetkorn T.
dc.contributor.authorUnwong P.
dc.contributor.authorBenjamat S.
dc.contributor.authorSuwanmanee S.
dc.contributor.authorWongsuk T.
dc.contributor.correspondencePumeesat P.
dc.contributor.otherMahidol University
dc.date.accessioned2024-12-15T18:11:43Z
dc.date.available2024-12-15T18:11:43Z
dc.date.issued2024-01-01
dc.description.abstractRhodotorula spp. have been associated with human infections, particularly in individuals with weakened immune systems. This study aimed to identify 31 isolates of Rhodotorula spp. recovered from coin-operated washing machines. The tubs, lint filters, detergent drawers, and fabric softener drawers were swabbed and streaked on Sabouraud dextrose agar (SDA) supplemented with 0.05 g L-1 chloramphenicol. Identification of Rhodotorula spp. was performed by using polymerase chain reaction (PCR) with fungus-specific primers targeting the internal transcribed spacer (ITS; ITS1-5.8-ITS2) regions. Moreover, the study investigated the production of extracellular enzymes, including phospholipase, esterase, and proteinase. The results showed that all 31 Rhodotorula spp. isolates grew well on SDA, forming round, smooth, moist mucoid, coral-red to salmon-colored colonies at 25 °C within 24 h. PCR analysis yielded approximately 620 bp products, and sequencing analysis identified 25 Rhodotorula mucilaginosa (80.65%) and 6 Rhodotorula dairenensis (19.35%) isolates. In this study, all R. mucilaginosa and R. dairenensis showed strong (pz = 0.7‒0.76) to very strong phospholipase activity (pz < 0.69). There were 16 R. mucilaginosa and 3 R. dairenensis that demonstrated esterase activity levels ranging from weak (pz = 0.91) to very strong (pz < 0.69). Only 14 R. mucilaginosa isolates displayed proteinase activity levels ranging from weak (pz = 0.92) to very strong (pz < 0.69). Therefore, the results implied that the potential pathogenic fungi distributed in the environment, particularly washing machines, may cause individuals to be at risk of being infected with these opportunistic yeasts, especially immunocompromised patients.
dc.identifier.citationItalian Journal of Mycology Vol.53 (2024) , 147-159
dc.identifier.doi10.6092/issn.2531-7342/19363
dc.identifier.eissn25317342
dc.identifier.scopus2-s2.0-85211378203
dc.identifier.urihttps://repository.li.mahidol.ac.th/handle/20.500.14594/102407
dc.rights.holderSCOPUS
dc.subjectEnvironmental Science
dc.subjectAgricultural and Biological Sciences
dc.subjectImmunology and Microbiology
dc.titleMolecular identification and extracellular enzyme production of Rhodotorula spp.
dc.typeArticle
mu.datasource.scopushttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85211378203&origin=inward
oaire.citation.endPage159
oaire.citation.startPage147
oaire.citation.titleItalian Journal of Mycology
oaire.citation.volume53
oairecerif.author.affiliationBansomdejchaopraya Rajabhat University
oairecerif.author.affiliationVajira Hospital
oairecerif.author.affiliationMahidol University

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