Abstract :
Pseudomonas aeruginosa is a bacterium that is able to adapt to low
oxygen and nutrient conditions. Pseudomonas aeruginosa can also infect the
lungs, so these bacteria can also be co-infected with the Covid-19 virus. In petai
plants (Parkia speciosa) contains phenolic compounds. In this study using extract
concentrations of 25%, 50%, 75%, and 100% which will then be used for
antibacterial testing. The purpose of this determination was to determine the
ability of 96% ethanol extract of petai leaves (Parkia speciosa) in inhibiting the
growth of Pseudomonas aeruginosa bacteria and to determine the concentration
of 100% ethanol extract of petai leaves (Parkia speciosa) which produced the
greatest inhibition zone on the growth of Pseudomonas aeruginosa bacteria. This
research uses experimental research type. The method used is Kirby & bauer
which uses a blank disk dipped in the extract and Nutrient Agar media. The
results obtained from this study from a positive control using the antibiotic
Ciprofloxacin from 4 replications obtained an average of 28.9 mm, and for 4
variants the concentration did not show any inhibition zones. The conclusion is
that 96% ethanol extract of petai leaves (Parkia spciosa) is not able to inhibit the
growth of Pseudomonas aeruginosa bacteria. At a concentration of 100% ethanol
extract 96% petai leaves (Parkia spciosa) could not produce an inhibition zone as
well as in the concentration variants of 25%, 50%, and 75%.