{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,3]],"date-time":"2026-06-03T06:58:28Z","timestamp":1780469908223,"version":"3.54.1"},"reference-count":62,"publisher":"MDPI AG","issue":"5","license":[{"start":{"date-parts":[[2021,4,29]],"date-time":"2021-04-29T00:00:00Z","timestamp":1619654400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["JoF"],"abstract":"<jats:p>Background: The incidence of candidiasis caused by non-albicans Candida (NAC) species is increasing. Candida tropicalis has emerged as one of the most important NAC species. This study aims to examine the antifungal susceptibility profile and some virulence factors of C. tropicalis isolated from various clinical specimens. Methods: A total of 71 C. tropicalis isolates from various clinical specimens (69.01%, 18.31%, 9.86%, and 2.82% of isolates were collected from urine, respiratory samples, blood, and skin and soft tissue infections, respectively) from ICU patients in Alexandria, Egypt. The isolates were identified at species level by CHROMagar Candida and VITEK 2 compact system. Furthermore, the antifungal susceptibility was determined using the VITEK 2 system AST-YS07 card containing different antifungals. Hemolysin, phospholipase, and proteinase activity and biofilm formation were also tested as virulence factors. Results: Only 30 isolates (42.25%) were non-susceptible (MIC \u2265 4 \u00b5g\/mL) to fluconazole, of which 28 isolates showed non-susceptibility (MIC \u2265 0.25 \u00b5g\/mL) to voriconazole. All isolates showed both hemolysin and proteinase activities, while only 9 isolates (12.68%) showed phospholipase production and 70 isolates (98.59%) demonstrated biofilm formation. Strong biofilm production was observed among the blood culture isolates (85.71%), followed by the respiratory and urinary isolates (61.54% and 46.94%, respectively). Conclusions: This study sought to provide useful data on the antifungal susceptibility of C. tropicalis isolates from ICU patients suffering from invasive infections with an increased trend towards elevated MICs levels of both fluconazole and voriconazole. Due to the high incidence of systemic candidiasis and antifungal resistance, C. tropicalis is emerging as a serious root of infections. Therefore, early and accurate identification of Candida species along with susceptibility testing is of utmost importance.<\/jats:p>","DOI":"10.3390\/jof7050351","type":"journal-article","created":{"date-parts":[[2021,4,30]],"date-time":"2021-04-30T05:10:55Z","timestamp":1619759455000},"page":"351","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":19,"title":["Virulence Factors and Antifungal Susceptibility Profile of C. tropicalis Isolated from Various Clinical Specimens in Alexandria, Egypt"],"prefix":"10.3390","volume":"7","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-4944-5962","authenticated-orcid":false,"given":"Mohammed A.","family":"El-Kholy","sequence":"first","affiliation":[{"name":"Department of Microbiology and Biotechnology, Clinical and Biological Sciences Division, College of Pharmacy, Arab Academy for Science, Technology and Maritime Transport (AASTMT), P.O. Box 1029, Alexandria, Egypt"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ghada F.","family":"Helaly","sequence":"additional","affiliation":[{"name":"Department of Microbiology, Medical Research Institute, Alexandria University, P.O. Box 1029, Alexandria, Egypt"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ebtisam F.","family":"El Ghazzawi","sequence":"additional","affiliation":[{"name":"Department of Microbiology, Medical Research Institute, Alexandria University, P.O. Box 1029, Alexandria, Egypt"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gamal","family":"El-Sawaf","sequence":"additional","affiliation":[{"name":"Department of Microbiology, Medical Research Institute, Alexandria University, P.O. Box 1029, Alexandria, Egypt"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sherine M.","family":"Shawky","sequence":"additional","affiliation":[{"name":"Department of Microbiology, Medical Research Institute, Alexandria University, P.O. Box 1029, Alexandria, Egypt"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2021,4,29]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"615958","DOI":"10.1155\/2014\/615958","article-title":"Non-albicans Candida Infection: An Emerging Threat","volume":"2014","author":"Deorukhkar","year":"2014","journal-title":"Interdiscip. Perspect. Infect. Dis."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"88","DOI":"10.1016\/j.micpath.2006.11.005","article-title":"Genetically regulated filamentation contributes to Candida albicans virulence during corneal infection","volume":"42","author":"Jackson","year":"2007","journal-title":"Microb. 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