Clinical Distribution Characteristics of 1439 Carbapenem-Resistant Strains in China: Drug Resistance, Geographical Distribution, Antibiotic MIC50/90.

PURPOSE

To explore the clinical distribution characteristics and antimicrobial susceptibilities of carbapenem-resistant () in Hebei Province, China, from 2017 to 2019, and provide data on the treatment of this bacterial infection and the prevention of its spread.

MATERIALS AND METHODS

A total of 1439 strains were collected from 2017 to 2019 in Hebei Province, China. Drug sensitivity tests were performed using the minimum inhibitory concentration (MIC) method, and the data were analyzed statistically using WHONET5.6 software.

RESULTS

A total of 54,377 strains of were isolated in Hebei Province from 2017 to 2019, of which 1439 strains were (2.65%). The highest proportion (33.78%) of strains was isolated from urine, and the detection rate showed a slow downward trend over the past 3 years. was mainly detected in densely populated and economically developed areas. Of all the patients, 54.2% were from the medical ward; the ratio of male to female patients with infections was 1.35:1; elderly patients and adults accounted for 59.6% and 30.8%, respectively, whereas minors and newborns accounted for 4.9% and 4.7%, respectively. For , the drug resistance rates to β-lactams were all higher than 80% and there was an annual increasing trend, while the drug resistance rates to quinolones remained nearly unchanged. The rate of resistance to aminoglycosides was relatively low, especially to amikacin (approximately 22%). The MIC50 of other antibacterial drugs, except amikacin, was equal to or higher than the break point of drug resistance.

CONCLUSION

From 2017 to 2019, the isolation rate of in Hebei Province, China, remained stable; however, the drug resistance rate showed an upward trend, primarily in cases of urinary tract infections in older men; the resistance rate to amikacin was the lowest.