1404
However , as determined by PCR with primers specific for the 26 - kDa product , the majority of cats at 2 and 4 weeks p . t . had gastric fluid samples which were positive for H . pylori and three of three cats at 2 weeks p . t . had dental plaque which was positive for H . pylori .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 None