Distribution and Drug Resistance of Bacterial Pathogens Associated with Lower Respiratory Tract Infection in Children and the Effect of COVID-19 on the Distribution of Pathogens.

Since 2017, the proportion of opportunistic infectious pathogens mainly including Klebsiella pneumoniae , Escherichia coli , and Staphylococcus aureus showed a decreasing trend, while community associated infectious pathogens mainly including Haemophilus influenzae , Moraxella catarrhalis , and Streptococcus pneumoniae increased.

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The constituent ratio of lower respiratory tract pathogens showed that opportunistic associated infection pathogens showed a decreasing trend after 2017, and community associated infection pathogens showed an increasing trend which was inseparable from the strengthening of nosocomial infection management measures in recent years, including the reporting of drug-resistant bacteria, isolation of the patient, and environment disinfection.

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