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Using a set of sera for which full chlamydial micro - immunofluorescence results suggested a clear diagnosis , we have evaluated the Chlamydia Spot - IF test ( bioMerieux ) , which allows a comparison of titres to Chlamydia trachomatis and C . psittaci antigens .
 GENE: Chlamydia trachomatis and C . psittaci antigens
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 GENE: Chlamydia trachomatis and C . psittaci antigens