Even by the use of enough high titar of bacteriophage, the phage typing of staphylococcus for the examination of staphylococcus infection or food poisoning encounters several times the difficulty of typing due to inhibition or host range spreading etc.
This difficulty induced us to try the use of adaptive phage in the examination of staphylococcus typing.
Several examinations showed that the use of adaptive phage is very satisfactory for the typing of this bacteria, and some examples of the examinations were presented.