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==Growth== The optimal growth temperature range for ''B. cereus'' is 30-40 Β°C.<ref name="Karim-2013">{{Cite journal | vauthors = Karim MA, Akhter N, Hoque S |date=2013 |title=Proteolytic activity, growth and nutrient release by Bacillus cereus LW-17 |url=https://www.banglajol.info/index.php/BJB/article/view/18043 |journal=Bangladesh Journal of Botany |language=en |volume=42 |issue=2 |pages=349β353 |doi=10.3329/bjb.v42i2.18043 |issn=2079-9926}}</ref> At {{convert|30|C|F}}, a population of ''B. cereus'' can double in as little as 20 minutes or as long as 3 hours, depending on the food product. Spores of ''B. cereus'' are not [[Metabolism|metabolically]] active, but can rapidly become active and begin [[Fission (biology)|replicating]] once they encounter adequate growth conditions.<ref>{{cite thesis |url=https://helda.helsinki.fi/bitstream/handle/10138/20888/foodandi.pdf |title=Food and indoor air isolated ''Bacillus'' non-protein toxins: structures, physico-chemical properties and mechanisms of effects on eukaryotic cells | vauthors = Mikkola R |publisher=[[University of Helsinki]] |year=2006 |isbn=952-10-3549-8 |page=12 |access-date=24 October 2015 |archive-url= https://web.archive.org/web/20190709153531/https://helda.helsinki.fi/bitstream/handle/10138/20888/foodandi.pdf |archive-date=9 July 2019 |url-status=live}}</ref>{{better source needed|date=November 2022}} {| class="wikitable" style="text-align:center;" !Food!! style="width:10em" |Minutes to double, {{convert|30|C|F}}!! style="width:10em" |Hours to multiply by 1,000,000 |- |Milk||20β36||{{n-life|n=2|t=20|t2=36|end=10^6|scale=60|dec=1}} |- |Cooked rice||26β31||{{n-life|n=2|t=26|t2=31|end=10^6|scale=60|dec=1}} |- |Infant formula||56||{{n-life|n=2|t=56|end=10^6|scale=60|dec=1}} |}
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