Using the quick search there are shown up to three reports about S19:
Strain S19 is a naturally occurring strain of B. abortus that does not cause disease and was discovered by Dr. John Buck in 1923. It has been used for more than six decades as vaccine that protects ca...
Biowissenschaften Chemie |Using the fulltext-search for the word S19 you can set up serveral searching-options > choose search options