Group B (O:4)

Serovars in this group share the O:4 somatic antigen. Group B contains some of the most clinically significant serovars, including S. Typhimurium.

Serovar	Antigenic Formula	Primary Animal Reservoir
S. Agama	4,12:i:1,6	Serovar Agama was found in lizards, chicken, cattle, badgers, and pigs
S. Agona	1,4,[5],12:f,g,s:[1,2]	Multiple animal species, including turkey, swine and cattle are reservoirs of serovar Agona.
S. Brandenburg	4,[5],12:l,v:e,n,z15	Serovar Brandenburg was found in different animal species (pigs, turkey, cattle, horse, deer and sheep.
S. Bredeney	1,4,12,27:l,v:1,7	Serovar Bredeney appeared to be associated with poultry, at least in Ireland it was associated with chicken; and in the US with turkey.
S. Chester	1,4,[5],12:e,h:e,n,x	There is not clear evidence of the animal reservoir for this serovar, although serovar Chester has been found in various animals, including turkeys...
S. Coeln	1,4,[5],12:y:1,2	Serovar Coeln has been isolated in high frequency (21.8%) in wild boars in Italy.
S. Derby	1,4,[5],12:f,g:[1,2]	The most common reservoir for serovar Derby is swine.
S. Haifa	1,4,[5],12:z10:1,2	Unknown but serovar Haifa was isolated from cattle, poultry, and pigs
S. Heidelberg	1,4,[5],12:r:1,2	Poultry, including chickens and turkeys, are the main reservoirs for serovar Heidelberg.
S. I 4,[5],12:b:-	1,4,[5],12:b:-	Chicken may be the primary reservoir of serovar I 4,[5],12:b:-; however, this serovar has also been isolated from horses
S. I 4,[5],12:i:-	1,4,[5],12:i:-	Chicken and swine are the major animal reservoirs of this serovar.
S. Indiana	1,4,12:z:1,7	The most common reservoir for serovar Indiana is retail chicken, but it was also found in cattle, turkey, duck, sheep and swine
S. Kiambu	1,4,12:z:1,5	The reservoir for serovar Kiambu remains unknown, but chickens and cattle may be potential hosts.
S. Paratyphi B	1,4,[5],12:b:1,2	Serovar Paratyphi B is almost exclusively host restricted to humans and closely related anthropoids.
S. Reading	1,4,[5],12:e,h:1,5	Poultry and swine are the implicated reservoirs for serovar Reading, and it has been the cause of death in turkey poults.
S. Saintpaul	1,4,[5],12:e,h:1,2	Unknown, but turkey and swine are likely to be reservoirs for serovar Saintpaul.
S. Sandiego	1,4,[5],12:e,h:e,n,z15	Serovar Sandiego has been found in small turtles and their environments, and also found in turkey flocks.
S. Schwarzengrund	1,4,12,27:d:1,7	Poultry is the main reservoir of S. Schwarzengrund.
S. Stanley	1,4,[5],12,[27]:d:1,2	Swine is the reservoir of serovar Stanley.
S. Typhimurium	1,4,[5],12:i:1,2	Serovar Typhimurium is host-generalists that can colonize and cause diseases in multiple animal species, including but not limited to cattle, poult...