4273
Using an opsonophagocytic bacterial assay and a suckling rat model of GBS sepsis , we analyzed a modified human immunoglobulin for opsonic and protective antibody .
 GENE: human immunoglobulin
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: human immunoglobulin 
Answer:
 GENE: human immunoglobulin