C
Figure 4. The specificity test. A. Specific test strip test: N negative control, 1-4 are Yersinia enterocolitica O:9, Escherichia coli O157, Salmonella enterica serovar Urbana O:30, and Francisella tularensis , 5,6 Brucella ; green arrow was the quality control line, and orange arrow was the detection line. B. Specificity was detected by the fluorescence quantification method.