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Figure 1: Haemagglutinin assay. Following Vibrio cholerae purification, haemagglutinin assay was performed in a serially diluted started from 1/2, 1/4, 1/8, 1/16, 1/32, 1/64, 1/128 and 1/256, until 1/512 that filled the second until the tenth microplate. The first microplate contained Vibrio cholerae 37, 8 kDa protein only, 11th microplate was empty and the last microplate contained erythrocyte suspension and phosphate-buffered saline (negative control group)

Figure 1: Haemagglutinin assay. Following <i>Vibrio cholerae</i> purification, haemagglutinin assay was performed in a serially diluted started from 1/2, 1/4, 1/8, 1/16, 1/32, 1/64, 1/128 and 1/256, until 1/512 that filled the second until the tenth microplate. The first microplate contained <i>Vibrio cholerae</i> 37, 8 kDa protein only, 11<sup>th</sup> microplate was empty and the last microplate contained erythrocyte suspension and phosphate-buffered saline (negative control group)