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Gold nanoparticles (AuNPs), because of their non-toxic nature and size\/shape dependent optical properties, offer interesting possibility. Here we report the antibacterial efficacy of AuNPs of different size and shape (AuNS10, AuNS100 and AuNR10; the number indicating the diameter in nm; <jats:italic>S<\/jats:italic> stands for sphere and <jats:italic>R<\/jats:italic> for rod) against the classical (O395) and El Tor (N16961) biotypes of <jats:italic>Vibrio cholerae<\/jats:italic>, the etiological agent responsible for cholera. Growth kinetics was monitored by measuring optical density at different time intervals and fitted by non-linear regression of modified Buchanan model. Sigmoidal growth curve for <jats:italic>Vc<\/jats:italic>O395 indicated the existence of single phenotype population and was affected by AuNR10 only, implying the importance of morphology of AuNP. Growth of <jats:italic>Vc<\/jats:italic>N16961 was affected by all three AuNPs indicating the vulnerability of El Tor biotype. Interestingly, <jats:italic>Vc<\/jats:italic>N16961 exhibited the occurrence of two phenotypic subpopulations \u2013 one with shorter (vulnerable Type 1) and the other with extended (tolerant Type 2) lag phase. Various assays were conducted to probe the impact of AuNPs on bacterial cells. Apart from AuNR10, antimicrobial efficacy of AuNS10 was better compared to AuNS100.<\/jats:p>","DOI":"10.1038\/s41598-017-09357-0","type":"journal-article","created":{"date-parts":[[2017,8,22]],"date-time":"2017-08-22T10:42:44Z","timestamp":1503398564000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":28,"title":["Modelling of growth kinetics of Vibrio cholerae in presence of gold nanoparticles: effect of size and morphology"],"prefix":"10.1038","volume":"7","author":[{"given":"Tanaya","family":"Chatterjee","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Barun K.","family":"Chatterjee","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pinak","family":"Chakrabarti","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2017,8,29]]},"reference":[{"key":"9357_CR1","doi-asserted-by":"publisher","first-page":"1064","DOI":"10.1126\/science.257.5073.1064","volume":"257","author":"HC Neu","year":"1992","unstructured":"Neu, H. 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