{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,23]],"date-time":"2026-04-23T07:45:07Z","timestamp":1776930307522,"version":"3.51.2"},"reference-count":44,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2019,10,10]],"date-time":"2019-10-10T00:00:00Z","timestamp":1570665600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/501100004489","name":"Mitacs","doi-asserted-by":"publisher","award":["IT04339"],"award-info":[{"award-number":["IT04339"]}],"id":[{"id":"10.13039\/501100004489","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["aiche.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Biotechnology Progress"],"published-print":{"date-parts":[[2020,1]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>\n                    The stress response of\n                    <jats:italic>Bordetella pertussis<\/jats:italic>\n                    during fermentation was assessed by means of fluorescence\u2010based techniques. During the manufacturing of vaccines,\n                    <jats:italic>B. pertussis<\/jats:italic>\n                    is subjected to stress during adaptation to a new environment and operating conditions in the bioreactor, which can have harmful consequences on growth and protein yield. In this study, stress was imposed by varying the percentage of dissolved oxygen (DO) and inoculum size, and by adding rotenone and hydrogen peroxide. In this study, fluorescence spectroscopy is used as a tool for measuring oxidative stress. High levels of DO during fed\u2010batch operation had no detrimental effect on growth, but the specific productivity of pertactin (PRN) decreased. Cultures that were started with an inoculum size that was 10 times smaller than the control resulted in significantly less PRN as compared to controls where reduction was more significant in flasks as compared to bioreactors. A comparison of filtered to heat\u2010sterilized media revealed that filtered media offered a protective effect against H\n                    <jats:sub>2<\/jats:sub>\n                    O\n                    <jats:sub>2<\/jats:sub>\n                    . Heat sterilization of the media might result in the destruction of components that offer protection against oxidative stress. Nonetheless, filter sterilization on its own would be insufficient for large\u2010scale manufacturing. It should be emphasized that the effects of these stressors while investigating for other microorganisms have not been studied for\n                    <jats:italic>B. pertussis<\/jats:italic>\n                    .\n                  <\/jats:p>","DOI":"10.1002\/btpr.2899","type":"journal-article","created":{"date-parts":[[2019,9,4]],"date-time":"2019-09-04T06:11:27Z","timestamp":1567577487000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Investigation of the effects of oxidative stress\u2010inducing factors on culturing and productivity of\n                    <i>Bordetella pertussis<\/i>"],"prefix":"10.1002","volume":"36","author":[{"given":"Vanessa","family":"Zavatti","sequence":"first","affiliation":[{"name":"Department of Chemical Engineering University of Waterloo  Waterloo Ontario Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0773-7457","authenticated-orcid":false,"given":"Hector","family":"Budman","sequence":"additional","affiliation":[{"name":"Department of Chemical Engineering University of Waterloo  Waterloo Ontario Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Raymond L.","family":"Legge","sequence":"additional","affiliation":[{"name":"Department of Chemical Engineering University of Waterloo  Waterloo Ontario Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Melih","family":"Tamer","sequence":"additional","affiliation":[{"name":"Manufacturing Technology Sanofi Pasteur  Toronto Ontario Canada"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2019,10,10]]},"reference":[{"key":"e_1_2_7_2_1","unstructured":"GalliardME.Gen\u00f3mica funcional deBordetella pertussis implicancias sobre una enfermedad considerada reemergente [PhD thesis]. La Plata Argentina: Universidad Nacional de La Plata. 2009."},{"key":"e_1_2_7_3_1","unstructured":"ThalenM.Whooping Cough Vaccines: Production of VirulentB. pertussis[PhD thesis]. 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