4840
Of 3841 serum samples from sows received from the Tennessee State Diagnostic Laboratory in 1991 - 1992 , 1130 were positive for Toxoplasma gondii antibody .
 GENE: Toxoplasma gondii antibody
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: Toxoplasma gondii antibody