A latex agglutination test for the presumptive identification of predominant Legionella spp. cultured from clinical or environmental sources, takes less than one minute to complete, easy to read blue latex, tests for Legionella pneumophila serogroup 1, 2 through 14, and seven other pathogenic Legionella spp., sensitivity is 98.8%, specificity is 100%, kit includes three latex reagents, controls, buffer, and cards.