1586
The frequency of positive anti - GM1 antibody titers in the Guillain - Barre syndrome patients with PEN 19 isolates was higher than that in the Guillain - Barre syndrome and Fisher ' s syndrome patients without PEN 19 isolates .
 GENE: anti - GM1 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: anti - GM1 antibody