Serotype or serovar refers to distinct variations within a species of bacteria or viruses or among immune cells of different individuals. These microorganisms, viruses, or cells are classified together based on their cell surface antigens, allowing the epidemiologic classification of organisms to the sub-species level.

Adeno-associated virus serotypes: vector toolkit for human gene therapy.
Epidemiological differences among pneumococcal serotypes
Serotypes, Virulence Genes, and Intimin Types of Shiga Toxin (Verotoxin)-Producing Escherichia coli Isolates from Healthy Sheep in S...
Development of a pentavalent rotavirus vaccine against prevalent serotypes of rotavirus gastroenteritis.
Rotavirus diarrhea in Bangladeshi children: correlation of disease severity with serotypes.
Infectious Clones and Vectors Derived from Adeno-Associated Virus (AAV) Serotypes Other Than AAV Type 2
Global distribution of rotavirus serotypes/genotypes and its implication for the development and implementation of an effective rota...
The Diarrheal Response of Humans to Some Classic Serotypes of Enteropathogenic Escherichia coli is Dependent on a Plasmid Encoding a...
Recombinant AAV Viral Vectors Pseudotyped with Viral Capsids from Serotypes 1, 2, and 5 Display Differential Efficiency and Cell Tro...
Sensitive, seminested PCR amplification of VP1 sequences for direct identification of all enterovirus serotypes from original clinic...