se·​ro·​type | \ ˈsir-ə-ˌtīp How to pronounce serotype (audio) , ˈser- \

Definition of serotype

: a group of intimately related microorganisms distinguished by a common set of antigens also : the set of antigens characteristic of such a group

Examples of serotype in a Sentence

Recent Examples on the Web In dengue fever, for example, antibodies to an initial infection can actually help dengue viruses of another serotype enter cells, leading to a more severe and sometimes fatal second infection. Jop De Vrieze, Science | AAAS, 18 Nov. 2020 The highly contagious illness is caused by rabbit hemorrhagic disease virus serotype two. Mica Soellner, Washington Examiner, 19 May 2020 Given as two drops into a child’s mouth, OPV for decades contained a mix of three weakened polio viruses, one for each of the three wild serotypes that have long plagued humanity. Leslie Roberts, Science | AAAS, 30 Dec. 2019 The rate of infections in participants dropped 97.7 percent for the dengue 2 serotype. Nina Kravinsky, Smithsonian, 8 Nov. 2019 But no approach has effectively combatted all four varieties—or serotypes—of the virus. Kelly Servick, Science | AAAS, 16 Jan. 2020 In the blood of a person who had been infected with dengue multiple times, researchers at Vanderbilt University found an antibody that could strongly bind to all four dengue serotypes and prevent them from infecting new cells. Kelly Servick, Science | AAAS, 16 Jan. 2020 Further Reading The poop of 100K cows may be to blame for that deadly romaine E. coli outbreak Like in other outbreaks, the contaminant in this case is a pathogenic E. coli, Escherichia coli serotype O157:H7, to be precise. Beth Mole, Ars Technica, 27 Nov. 2019 Dengue is a complex disease and experts have long worried that developing a vaccine that could safely protect against all four serotypes could be very difficult. Helen Branswell, STAT, 23 Nov. 2019 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'serotype.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of serotype

1946, in the meaning defined above

History and Etymology for serotype

sero- + type entry 1

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Time Traveler for serotype

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The first known use of serotype was in 1946

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Cite this Entry

“Serotype.” Dictionary, Merriam-Webster, Accessed 13 Aug. 2022.

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More Definitions for serotype


se·​ro·​type | \ ˈsir-ə-ˌtīp How to pronounce serotype (audio) , ˈser- How to pronounce serotype (audio) \

Medical Definition of serotype

 (Entry 1 of 2)

1 : a group of intimately related microorganisms distinguished by a common set of antigens
2 : the set of antigens characteristic of a serotype

Other Words from serotype

serotypic \ ˌsir-​ə-​ˈtip-​ik How to pronounce serotype (audio) \ adjective
serotypically \ -​i-​k(ə-​)lē How to pronounce serotype (audio) \ adverb


transitive verb
serotyped; serotyping

Medical Definition of serotype (Entry 2 of 2)

: to determine the serotype of serotype streptococci serotyped isolates from 100 patients


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