1- what is the result of P. Vulgaris in the Negative Stain? 2-What is the result of P. aeruginosa in the Negative Stain? 3- What is the result of L. lactic in the Negative Stain? 2-What is the result of P. aeruginosa in the Negative Stain? 3- What is the result of L. lactic in the Negative Stain?.