What does the Gram staining show? Answer Presence of Gram negative bacilli. What is the most common predisposing factor for this infection in clinical practice? a Answer Soft contact lens wearer. Pseudomonas aeruginosa can grow readily in the biofilm of contact lenses if they are not thoroughly cleaned. What antibiotic would you use to treat this patient? a Answer Aminoglycoside such as gentamicin or ciprofloxacin are useful. Pseudomonas is resistant to chloramphenicol.
