Group D1 (O:9)

Serovars in this group share the O:9 somatic antigen. Group D1 includes S. Enteritidis, the most common serovar in human salmonellosis globally, and S. Typhi, the causative agent of typhoid fever.

Serovar	Antigenic Formula	Primary Animal Reservoir
S. Baildon	9,46:a:e,n,x	Serovar Baildon was found in cattle, wild boar, American white ibis, and common bottlenose dolphin
S. Berta	1,9,12:f,g,t:-	Serovar Berta was found in cattle, chickens, turkeys, wild boars, dogs, horses, and deer, albeit
S. Dublin	1,9,12[Vi]:g,p:-	Cattle is the reservoir of this serovar, but it can cause disease in other animals, such as dogs, as well.
S. Eastbourne	1,9,12:e,h:1,5	Reptiles are the potential reservoir for serovar Eastbourne; however, it has been isolated from chickens, cattle, and swine.
S. Enteritidis	1,9,12:g,m:-	Chicken is the main reservoir.
S. Gallinarum (Biovar Gallinarum)	1,9,12:-:-	Chickens are the primary hosts for biovar Gallinarum, although other bird species can also be affected.
S. Gallinarum (Biovar Pullorum)	1,9,12:-:-	Biovar Pullorum can be found in almost all species of birds.
S. I 9:l,z28:-	1,9,12:l,z28:-	Unknown; however, one isolate (GCA_009223065.1) was obtained from cattle feces.
S. Javiana	1,9,12:l,z28:1,5	According to CDC, serovar Javiana is mainly associated with amphibians.
S. Lomalinda	1,9,12:a:e,n,x	Unknown, but according to the metadata from NCBI PD, serovar Lomalinda was previously isolated from rodents and great horned owl (Bubo virginianus)
S. Miami	1,9,12:a:1,5	Serovar Miami was found to be host-generalist.
S. Napoli	1,9,12:l,z13:e,n,x	Unknown, poultry and wild boars may be potential reservoirs for serovar Napoli.
S. Ouakam	9,46:z29:-	Unknown, but according to the metadata from NCBI PD (accessed 05/14/2025), poultry (particularly turkey and chicken)
S. Panama	1,9,12:l,v:1,5	Serovar Panama demonstrates a broad host range, including swine, cattle, reptiles, and amphibians.
S. Typhi	9,12,[Vi]:d:-	Salmonella Typhi is a human-restricted serovar.