Co-infections among COVID-19 adult patients admitted to intensive care units: results from a retrospective study

Co-infections among COVID-19 adult patients admitted to intensive care units: results from a retrospective study

Authors

  • V. Damico
  • L. Murano
  • V. Margosio
  • C. Ripamonti

Keywords:

: Infection, Healthcare Associated Infections, HAI, Intensive Care, ICU, COVID-19, SARS-CoV-2, Surveillance

Abstract

Background. Co-infection rates increase in patients admitted to the Intensive Care Units. The aim of this study was to examine the Healthcare Associated Infections in critically ill adult patients infected with SARS-CoV-2.

Methods. A retrospective observational study in adults with confirmed SARS-CoV-2 infection requiring intensive care unit admission was performed. From February 2020 to September 2021, healthcare records from a total of 118 patients were evaluated.

Results. In the study period, 39 patients were diagnosed with at least 1 Healthcare Associated Infection (33.1%). The co-infection/co-colonisation rate >48 hours after admission was 29.0 per 1,000 person/ days (95 % CI 19.1–33.9). A total of 94 isolates were identified, the most common being Klebsiella spp, Clostridium difficile, Acinetobacter baumanii and Enterococcus spp. Associated outcomes for Healthcare Associated Infections have been identified: age >64 years (p= .003), length of Intensive Care Unit stay> 7 days (p= .002), Type 2 Diabetes mellitus (p= .019), cardiovascular disease (p= .021), inserted central venous  catheter (p= .014), intubation (p< .001), APACHE II score >25 (p< .001), mechanical ventilation >48 hours (p= .003),  and inserted urinary catheter (p= .002). The overall fatality rate of patients included in the study was 41.5% (n= 49), and it was found to be significantly higher in patients who acquired a Healthcare Associated Infection (n=26/39, 66.7%) compared to those who did not acquire it (n= 23/79, 29.1%) (OR= 4.87; 95% CI = 2.14-11.10; p< .001).

Conclusions. Our study showed high rates of Healthcare Associated Infections in critically ill adults with COVID-19. Associated factors for Healthcare Associated Infections acquisition and fatality in Intensive Care Units patients were identified as a good reason for a revision of existing infection control policies.

References

1. Grasselli G, Pesenti A, Cecconi M. Critical care utilization for the COVID-19 outbreak in Lombardy, Italy. JAMA. 2020 Apr 28; 323(16): 1545-6. doi: 10.1001/jama.2020.4031.

2. Zhou F, Yu T, Du R, et al. Clinical course and risk factors for mortality of adult inpatients with COVID-19 in Wuhan, China: a retrospective cohort study. Lancet. 2020 Mar 28; 395(10229): 1054-62. doi: 10.1016/S0140-6736(20)30566-3.

Epub 2020 Mar 11. Erratum in: Lancet. 2020 Mar 28; 395(10229): 1038.

3. Herold T, Jurinovic V, Arnreich C, et al. Elevated levels of IL-6 and CRP predict the need for mechanical ventilation in COVID-19. J Allergy Clin Immunol. 2020 Jul; 146(1): 128-36.e4. doi: 10.1016/j.jaci.2020.05.008. Epub 2020 May 18.

4. Guan W, Ni Z, Hu Y et al; China Medical Treatment Expert Group for Covid-19. Clinical characteristics of coronavirus disease 2019 in China. N Engl J Med. 2020 Apr 30; 382(18): 1708-20. doi: 10.1056/NEJMoa2002032. Epub 2020 Feb 28.

5. Huang C, Wang Y, Li X, et al. Clinical features of patients infected with 2019 novel coronavirus in Wuhan, China. Lancet. 2020 Feb 15; 395(10223): 497-506. doi: 10.1016/S01406736(20)30183-5. Epub 2020 Jan 24.

6. Grasselli G, Zangrillo A, Zanella A, et al; COVID-19 Lombardy ICU Network. Baseline characteristics and outcomes of 1591 patients infected with SARS-CoV-2 admitted to ICUs of the Lombardy region, Italy. JAMA. 2020 Apr 28; 323(16): 1574-81. doi: 10.1001/jama.2020.5394. Erratum in: JAMA. 2021 May 25; 325(20): 2120.

7. Weiss P, Murdoch DR. Clinical course and mortality risk of severe COVID-19. Lancet. 2020: Mar 28; 395(10229): 1014-5. doi: 10.1016/ S0140-6736(20)30633-4. Epub 2020 Mar 17.

8, Schmidt M, Hajage D, Demoule A, et al. Clinical characteristics and day-90 outcomes of 4244 critically ill adults with COVID-19: a prospective cohort study. Intensive Care Med. 2021 Jan; 47(1): 60-73. doi: 10.1007/s00134-020-06294-x. Epub 2020 Oct 29.

9. Fattorini L, Creti R, Palma C, Pantosti A. Bacterial coinfections in COVID-19: an underestimated adversary. Ann Ist Super Sanita. 2020 Jul-Sep; 56(3): 359-64. doi: 10.4415/ANN_20_03_14.

10. Zhang G, Hu C, Luo L, et al. Clinical features and short-term outcomes of 221 patients with COVID-19 in Wuhan, China. J Clin Virol. Jun 2020; 127: 104364. doi: 10.1016/j.

jcv.2020.104364. Epub 2020 Apr 9.

11, Despotovic A, Milosevic B, Milosevic I, et al. Hospital-acquired infections in the adult intensive care unit—Epidemiology, antimicrobial resistance patterns, and risk factors for acquisition and mortality. Am J Infect Control. 2020 Oct; 48(10): 1211-5. doi: 10.1016/j.ajic.2020.01.009.

Epub 2020 Feb 21.

12, Klavs I, Kolman J, Zupanc TL, Kevorkijan BK, Koroec A; SNHPS Network. The prevalence of and risk factors for healthcare-associated infections in Slovenia: results of the second national survey [Prevalenca in Dejavniki Tveganja Za Bolninine Okube V Sloveniji: rezultati druge Nacionalne Presene Raziskave]. Zdr Varst. 2016 Jul 28; 55(4): 239-47. doi: 10.1515/sjph-20160033.

13. Kolpa M, Walaszek M, Gniadek A, Wolak Z, Dobros W. Incidence, microbiological profile and risk factors of healthcare-associated infections in intensive care units: a 10 year observation in a provincial hospital in southern Poland. Int Environ Res Public Health. 2018 Jan 11; 15(1): 112. doi: 10.3390/ijerph15010112.

14. Suetens C, Latour K, Karki T, et al; The Healthcare-Associated Infections Prevalence Study Group. Prevalence of healthcare-associated infections, estimated incidence and composite antimicrobial resistance index in acute care hospitals and long-term care facilities: results from two european point prevalence surveys, 2016 to 2017. Euro Surveill. 2018 Nov; 23(46): 1800516. doi: 10.2807/1560-7917. ES.2018.23.46.1800516. Erratum in: Euro Surveill. 2018 Nov; 23(47).

15, Baskaran V, Lawrence H, Lansbury LE, et al. Coinfection in critically ill patients with COVID19: an observational cohort study from England. J Med Microbiol. 2021 Apr; 70(4): 001350. doi: 10.1099/jmm.0.001350.

16. Alhazzani W, Møller MH, Arabi YM, et al. Surviving Sepsis Campaign: guidelines on the management of critically ill adults with Coronavirus Disease 2019 (COVID-19). Intensive Care Med. 2020 May; 46: 854-87. doi: 10.1007/ s00134-020-06022-5. Epub 2020 Mar 28.

17. Rodríguez-Acelas AL, de Abreu Almeida M, Engelman B, Cañon-Montañez W. Risk factors for health care-associated infection in hospitalized adults: systematic review and meta-analysis. Am Infect Control. 2017 Dec 1; 45: e149-e156. doi: 10.1016/j.ajic.2017.08.016. Epub 2017 Oct 12.

18. Koch AM, Nilsen RM, Eriksen HM, Cox RJ, Harthug S. Mortality related to hospital associated infections in a tertiary hospital; repeated cross-sectional studies between 2004-2011. Antimicrob Resist Infect Control. 2015 Dec 29; 4: 57. doi: 10.1186/s13756-015-0097-9.

19. Pouwels KB, Vansteelandt S, Batra R, Edgeworth D, Smieszek T, Robotham V. ICU acquired bacteraemia and ICU mortality and discharge: addressing time-varying confounding using appropriate methodology. J Hosp Infect. 2018 May; 99(1): 42-7. doi: 10.1016/j. jhin.2017.11.011. Epub 2017 Nov 23.

20. Cornejo-Juárez P, Vilar-Compte D, PérezJiménez C, Ñamendys-Silva SA, Sandoval Hernández S, Volkow-Fernáandez P. The impact of hospital-acquired infections with multidrugresistant bacteria in an oncology intensive care unit. Int Infect Dis. 2015 Feb; 31: 31-4. doi: 10.1016/j.ijid.2014.12.022. Epub 2014 Dec 17.

21. Auld SC, Caridi-Scheible M, Blum JM, et al; and the Emory COVID-19 Quality and Clinical Research Collaborative. ICU and Ventilator Mortality Among Critically Ill Adults With Coronavirus Disease 2019. Crit Care Med. 2020 Sep; 48(9): e799-e804. doi: 10.1097/ CCM.0000000000004457.

22. Oliveira E, Parikh A, Lopez-Ruiz A, et al. ICU outcomes and survival in patients with severe COVID-19 in the largest health care system in central Florida. PLoS One. 2021 Mar 25; 16(3):

e0249038. doi: 10.1371/journal.pone.0249038.

23. Iregui M, Ward S, Sherman G, Fraser VJ, Kollef MH. Clinical importance of delays in the initiation of appropriate antibiotic treatment for ventilator associated pneumonia. Chest. 2002 Jul; 122(1): 262-8. doi: 10.1378/chest.122.1.262.

24. Twigg D, Duffield C, Thompson PL, Rapley P. The impact of nurses on patient morbidity and mortality - the need for a policy change in response to the nursing shortage. Aust Health Rev. 2010 Aug; 34(3): 312-6. doi: 10.1071/ AH08668.

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Published

2025-08-04

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Section

Original research

How to Cite

1.
Damico V, Murano L, Margosio V, Ripamonti C. Co-infections among COVID-19 adult patients admitted to intensive care units: results from a retrospective study. Ann Ig. 2025;35(1):49-60. doi:10.7416/ai.2022.2515