6629
These studies indicate that the acidimetric test was less sensitive than the chromogenic cephalosporin substrates and that nitrocefin and S1 could be used to screen for beta - lactamase production in these tested species .
 GENE: beta - lactamase
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
 Entities: beta - lactamase 
Answer:
 GENE: beta - lactamase