CREATE TABLE table_20540 ("Species" TEXT, "Indole" TEXT, "Methyl Red" TEXT, "Voges-Proskauer" TEXT, "Citrate" TEXT)

What is the result for salmonella spp. if you use citrate?
SELECT COUNT("Citrate") FROM table_20540 WHERE "Species" = 'Salmonella spp.'
SELECT COUNT("Citrate") FROM "table_20540" WHERE "Species" = 'Salmonella spp.'