Objective:To analyze the clinical distribution and infection characteristics of clinical isolates of non-Acinetobacter baumannii(non-A.baumannii).Methods:A total of 197 non-A.baumannii strains isolated from January 2021 to June 2023 at the Fourth Affiliated Hospital of Soochow University were collected.The strains were classified into A.nosocomialis,A.pittii/seifertii,and non-A.calcoaceticus-baumannii(ACB)complex,and their clinical distributions and infection characteristics were compared.Results:The isolation rate of non-A.baumannii had been increasing annually.There was no statistically significant difference in the drug resistance rates of the different non-A.baumannii strains to 15 types of drugs.The mean age of patients infected with non-ACB complex was the highest[(69.68±14.65)years].For A.nosocomialis infections,the average hospital stay was the longest[(30.81±18.54)d],the ICU admission rate(31.25％)and the proportion of adverse outcomes(9.38％)were all the highest among the three groups of non-A.baumannii infections.The differences in average hospital stay and ICU admission rates among the three types of non-A.baumannii infections were statistically significant(P＜0.05).Non-A.baumannii infections were mostly hospital-acquired,and co-detection with other bacteria was common.Compared with patients with single bacterial detection,those with mixed bacterial detection had a higher proportion of male patients,a higher proportion of long hospital stays(≥28 d),a higher rate of invasive procedures,a higher rate of ICU stay history,increased white blood cell count,increased neutrophil ratio,and higher procalcitonin levels,with all differences being statistically significant(P＜0.05).Conclusion:The detection of non-A.baumannii has been increasing yearly,and different non-A.baumannii strains exhibit different clinical distributions and infection characteristics.Therefore,increased attention and monitoring of non-A.baumannii infections in the hospital setting are warranted.
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