1. Detection of natural Mycoplasma pulmonis infection in rats and mice by an enzyme linked immunosorbent assay (ELISA);Cassell;Lab. Anim. Sci.,1981
2. Protective effect of vaccination against Mycoplasma pulmonis respiratory disease in rats;Cassell;Infect. Immun.,1978
3. Protective effect of vaccines on Mycoplasma pulmonis-induced respiratory disease of mice;Taylor;Infect. Immun.,1977
4. Aromatic-dependent Salmonella typhimurium are non-virulent and effective as live vaccines;Hoiseth;Nature (London),1981
5. Oral vaccination of mice against tetanus by use of a live attenuated Salmonella carrier;Fairweather;Infect. Immun.,1990