<![CDATA[Introduction: To prove the effect of prolonged exposure to the antibiotic meropenem on the emergence of Acinetobacter baumannii resistance in vitro. Methods: Meropenem-susceptible Acinetobacter baumannii isolates were exposed to 0.1 mg/ml meropenem and incubated for 8 days. The optical density and number of Acinetobacter baumannii bacterial colonies were observed every 24 hours. The average of optical density and the number of Acinetobacter baumannii bacterial colonies growing every 24 hours were analyzed using the Kruskal-Wallis test. Results: The results showed a decrease in the average optical density value and the number of Acinetobacter baumannii bacterial colonies from day 1 to day 6 of incubation. However, there was an increase in the average optical density and the number of Acinetobacter baumannii bacterial colonies starting on day 7 and day 8. Conclusions: Exposure to the antibiotic meropenem 0.1 mg/ml for 6 days might be associated with the emergence of Acinetobacter baumannii resistance in vitro.]]>
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