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Two species complexes,\n                      <jats:italic>Cryptococcus neoformans<\/jats:italic>\n                      and\n                      <jats:italic>Cryptococcus gattii<\/jats:italic>\n                      , pose health risks to humans and animals. Cryptococcal infections result from inhalation of aerosolized spores and\/or desiccated yeasts from terrestrial reservoirs such as soil and trees. More recently,\n                      <jats:italic>C. gattii<\/jats:italic>\n                      has been implicated in infections in marine mammals, suggesting that inhalation of cells from the air-water interface is also an important, yet understudied, mode of respiratory exposure. Based on historical records and epidemiological factors, water transport has been hypothesized to play a role in the spread of\n                      <jats:italic>C. gattii<\/jats:italic>\n                      from tropical to temperate environments. However, the dynamics of fungal persistence and transport in water have not been fully studied. The size of the cryptococcal capsule was previously shown to reduce cell density and increase buoyancy. Here, we demonstrate that cell buoyancy is also impacted by the salinity of the solution in which cells are suspended, with the formation of a halocline significantly slowing the rate of settling and resulting in persistence of\n                      <jats:italic>C. neoformans<\/jats:italic>\n                      within 1 cm of the water surface for over 60 min and\n                      <jats:italic>C. gattii<\/jats:italic>\n                      for 4\u20136 h. During the culture of three strains of\n                      <jats:italic>C. gattii<\/jats:italic>\n                      in yeast peptone dextrose media, we also identified aggregates of extracellular polysaccharide with complex structures, which we hypothesize from rafts that entrap cells and augment buoyancy. These findings illustrate new mechanisms by which cryptococcal cells may persist in aquatic environments, with important implications for aqueous transport and pathogen exposure.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>IMPORTANCE<\/jats:title>\n                    <jats:p>\n                      Cryptococcosis is a major fungal disease leading to morbidity and mortality worldwide.\n                      <jats:italic>Cryptococcus neoformans<\/jats:italic>\n                      is a major fungal species of public health concern, causing opportunistic systemic infections in immunocompromised patients.\n                      <jats:italic>Cryptococcus gattii<\/jats:italic>\n                      was traditionally a pathogenic fungus confined primarily to tropical regions, but in the 1990s, it emerged in the temperate climates of British Columbia, Canada and the Pacific Northwest of the United States. Outbreaks in these areas also led to the first host record of cryptococcosis in free-ranging cetaceans.\n                      <jats:italic>C. gattii<\/jats:italic>\n                      is particularly concerning as an emerging fungal pathogen due to its capacity to cause clinical disease in immunocompetent patients, its recent spread to a new ecological niche, and its higher resistance to antifungal therapies. Our research defines fungal characteristics that influence the transport of cryptococci through water and persistence of fungal cells near the water surface, improving our understanding of potential mechanisms for cryptococcal environmental transport.\n                    <\/jats:p>\n                  <\/jats:sec>","DOI":"10.1128\/msphere.00848-24","type":"journal-article","created":{"date-parts":[[2024,11,27]],"date-time":"2024-11-27T09:00:51Z","timestamp":1732698051000},"update-policy":"https:\/\/doi.org\/10.1128\/asmj-crossmark-policy-page","source":"Crossref","is-referenced-by-count":5,"title":["The buoyancy of cryptococcal cells and its implications for transport and persistence of\n                    <i>Cryptococcus<\/i>\n                    in aqueous environments"],"prefix":"10.1128","volume":"9","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5384-7809","authenticated-orcid":true,"given":"Isabel A.","family":"Jimenez","sequence":"first","affiliation":[{"name":"Department of Molecular and Comparative Pathobiology, The Johns Hopkins University School of Medicine","place":["Baltimore, USA"]},{"name":"Department of Molecular Microbiology and Immunology, Johns Hopkins University Bloomberg School of Public Health","place":["Baltimore, USA"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4694-3448","authenticated-orcid":false,"given":"Piotr R.","family":"Stempinski","sequence":"additional","affiliation":[{"name":"Department of Molecular Microbiology and Immunology, Johns Hopkins University Bloomberg School of Public Health","place":["Baltimore, USA"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4068-5828","authenticated-orcid":true,"given":"Quigly","family":"Dragotakes","sequence":"additional","affiliation":[{"name":"Department of Molecular Microbiology and Immunology, Johns Hopkins University Bloomberg School of Public Health","place":["Baltimore, USA"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8912-7782","authenticated-orcid":false,"given":"Seth D.","family":"Greengo","sequence":"additional","affiliation":[{"name":"Department of Molecular Microbiology and Immunology, Johns Hopkins University Bloomberg School of Public Health","place":["Baltimore, USA"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4110-9873","authenticated-orcid":true,"given":"Lia","family":"Sanchez Ramirez","sequence":"additional","affiliation":[{"name":"Department of Molecular Microbiology and Immunology, Johns Hopkins University Bloomberg School of Public Health","place":["Baltimore, USA"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9402-9167","authenticated-orcid":true,"given":"Arturo","family":"Casadevall","sequence":"additional","affiliation":[{"name":"Department of Molecular Microbiology and Immunology, Johns Hopkins University Bloomberg School of Public Health","place":["Baltimore, USA"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"235","reference":[{"key":"e_1_3_3_2_2","doi-asserted-by":"publisher","DOI":"10.7589\/2015-11-299"},{"key":"e_1_3_3_3_2","doi-asserted-by":"publisher","DOI":"10.3354\/dao03080"},{"key":"e_1_3_3_4_2","first-page":"792","article-title":"Multispecies outbreak of cryptococcosis on southern Vancouver Island, British Columbia","volume":"43","author":"Stephen C","year":"2002","unstructured":"Stephen C, Lester S, Black W, Fyfe M, Raverty S. 2002. 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