Title: Torremorell M. 1995;4:139-143. Vaccination against S suis
Headings: Vaccination against
Streptococcus suis
:
Effect on nursery mortality

Field study
Vaccination against Streptococcus suis:
Effect on nursery mortality
Montserrat Torremorell, DVM; Carlos Pijoan, DVM, PhD; Emilio Trigo, DVM, PhD
Summary
Material and methods
Herd history and clinical evaluation
Field vaccine trial
Statistical analysis
Posttrial vaccination protocols
Results
Discussion
Implications
References

Content: an experimental autogenous vaccine administered intramuscularly (IM) (n=90); a standard autogenous vaccine administered IM (n=90); a commercial bacterin, administered intraperitoneally  (IP) (n=60); or no vaccine (n=90). Nursery mortality was monitored from the start of the trial (18 days of age) until the end of the nursery period  (9 weeks of age). Results: Nursery mortality before the start of the trial was approximately 17%. There were no significant differences among the four treatment groups; however, there was a trend toward decreased mortality among pigs that received the experimental autogenous vaccine. Overall nursery mortality at the end of the trial had decreased to 3.3%.