Editing Shigellosis (section)

===Bacteria===
Shigellosis is caused by a bacterial infection with ''[[Shigella]]'',<ref name=CDC2016Fact/> a bacterium that is genetically similar to and was once classified as ''[[E. coli]]''.<ref name="Ragupathi 2017">{{cite journal |last1=Devanga Ragupathi |first1=NK |last2=Muthuirulandi Sethuvel |first2=DP |last3=Inbanathan |first3=FY |last4=Veeraraghavan |first4=B |title=Accurate differentiation of ''Escherichia coli'' and ''Shigella'' serogroups: challenges and strategies |journal=New Microbes New Infect. |volume=21 |date=21 January 2018 |pages=58–62 |doi=10.1016/j.nmni.2017.09.003 |pmid=29204286 |pmc=5711669}}</ref> There are three [[serogroup]]s and one [[serotype]] of ''Shigella'':
* ''[[Shigella flexneri]]''
* ''[[Shigella boydii]]''
* ''[[Shigella dysenteriae]]'' and
* ''[[Shigella sonnei]]'' (serotype)<ref name=CDC2016Fact/>

The probability of being infected by any given strain of ''Shigella'' varies around the world. For instance, ''S. sonnei'' is the most common in the United States, while ''S. dysenteriae'' and ''S. boydii'' are rare there.<ref name=CDC2016Fact/>