Microbes within polymicrobial communities can establish positive and negative interactions that have the potential to influence the overall behaviour of the community. Pseudomonas aeruginosa and species of the Burkholderia cepacia complex (Bcc) can co-exist in the lower airways. however several studies have shown that P. aeruginosa can effectively kill the Bcc in vitro. https://www.nacrack.com/huge-sale-Moondrop-Quarks-quick-choice/