Opportunistic Pathogens of Plants, Animals, and Humans Nonfermenters may withstand treatment with chlorhexidine and quaternary ammonium compounds.Aerobic nonfermenters: 10-15% of clinical isolates Pseudomonas aeruginosa; Burkholderia cepacia; Stenotrophomonas maltophilia; Acinetobacter baumannii; Moraxella catarrhalis: Account for 75% of all clinical isolates of aerobic nonfermenters Simply summarizeNonfermentative gram-negative bacilli have been classified into at least 15 families, and tend to be resistant to several Antimicrobial agents Clinically Important Aerobic Gram-Negative Bacilli Include: ?