A comparison of immunogenicity and in vivo distribution of Salmonella enterica serovar Typhi and Typhimurium live vector vaccines delivered by mucosal routes in the murine model.
We evaluated the immune responses elicited by attenuated Salmonella enterica serovar Typhi vaccine strain CVD 908-htrA and serovar Typhimurium strain SL3261 alone or as live vectors carrying a plasmid encoding fragment C of tetanus toxin (pTETnir15) in mice immunized intranasally and orogastrically, as well as the in vivo distribution of vaccine organisms following immunization. Higher serologic and proliferative responses against both vector and the foreign antigen were elicited when vaccines were delivered by intranasal route. Whereas both Salmonella strains were detected in the nasal tissue, lungs, and Peyer's patches following intranasal and orogastric immunization, larger numbers of vaccine organisms were recovered from these tissues when the vaccines were delivered intranasally.
Pasetti
M F
MF
Center for Vaccine Development, Department of Pediatrics, University of Maryland School of Medicine, 685 West Baltimore St, Room 480, Baltimore, MD 21201, USA.
Pickett
T E
TE
Levine
M M
MM
Sztein
M B
MB
D000281:Administration, Intranasal; D000818:Animals; D001428:Bacterial Vaccines / Q000276:immunology*; D007114:Immunization; D007074:Immunoglobulin G / Q000097:blood; D008070:Lipopolysaccharides / Q000276:immunology; D008213:Lymphocyte Activation; D051379:Mice; D008807:Mice, Inbred BALB C; D012485:Salmonella typhi / Q000276:immunology* / Q000302:isolation & purification; D012486:Salmonella typhimurium / Q000276:immunology* / Q000302:isolation & purification
D001428:Bacterial Vaccines; D007074:Immunoglobulin G; D008070:Lipopolysaccharides