Abstract

We aimed to investigate the effects of secondary bacterial and fungal infections on patient outcomes in patients followed up in the intensive care unit (ICU) due to coronavirus disease 2019 (COVID-19). We retrospectively analyzed reverse transcriptase polymerase chain reaction (RT-PCR) positive COVID-19 patients followed in the ICU of our hospital between March 2020 and June 2021, using the hospital information system. Demographic data, pathogens causing a secondary infection, onset time of secondary infection, and patient outcomes were recorded. A total of 251 RT-PCR positive patients who met the inclusion criteria were evaluated. The mean length of stay (LOS) in the ICU was 13.3 ± 9.6 days. During this period, 165 (65.7%) patients died. When blood, urine, respiratory tract, and catheter cultures were examined, the number of patients with growth in at least one culture was 129 (51.4%). There was growth in a total of 227 cultures. The highest culture positivity rate was observed in respiratory tract samples (n = 94, 41.4%). Gram-negative bacterial pathogens (n = 130, 58.4%) predominated. Candida spp. was more frequent in urine cultures. The median day of the occurrence of secondary infection was 10 (range: 6-15). Patients who developed secondary infection had a longer LOS and higher mortality rate than patients who did not (p < 0.001). Gram-negative secondary infections, predominantly in respiratory tract cultures, occurred in COVID-19 patients followed in the ICU. As a result, the LOS was prolonged and mortality rates increased.

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