BACKGROUND
Clostridium difficile
infection (CDI) has increased in prevalence during the last years. The coronavirus disease 2019 (COVID-19) pandemic has negatively influenced patient outcomes. The majority of the severe acute respiratory syndrome-coronavirus 2 (SARS-CoV-2)-infected patients received antibiotics during hospitalization.
AIM
To analyze the factors that influenced CDI development after SARS-CoV-2 infection.
METHODS
Between March 2020 to December 2020, we performed a prospective observational study including 447 patients diagnosed with CDI who were admitted to our tertiary referral university hospital. The diagnosis of CDI was based on the presence of diarrhea (≥ 3 watery stools within 24 h) associated with
Clostridium difficile
toxins A or B. We excluded patients with other etiology of acute diarrhea.
RESULTS
Among the total 447 (12.5%) patients with CDI, most were male (54.3%) and mean age was 59.7 ± 10.8 years. Seventy-six (17.0%) had history of COVID-19, most being elderly (COVID-19: 62.6 ± 14.6 years
vs
non-COVID-19: 56.8 ± 17.6 years,
P
= 0.007), with history of alcohol consumption (43.4%
vs
29.4%,
P
= 0.017), previous hospitalizations (81.6%
vs
54.9%,
P
< 0.001) and antibiotic treatments (60.5%
vs
35.5%,
P
< 0.001), requiring higher doses of vancomycin and prone to recurrent disease (25.0%
vs
13.1%,
P
= 0.011). Age over 60 years [odds ratio (OR): 2.591, 95% confidence interval (CI): 1.452-4.624,
P
= 0.001], urban residence (OR: 2.330, 95%CI: 1.286-4.221,
P
= 0.005), previous antibiotic treatments (OR: 1.909, 95%CI: 1.083-3.365,
P
= 0.025), previous hospitalizations (OR: 2.509, 95%CI: 1.263-4.986,
P
= 0.009) and alcohol consumption (OR: 2.550, 95%CI: 1.459-4.459,
P
= 0.001) were risk factors of CDI in COVID-19.
CONCLUSION
CDI risk is unrelated to history of SARS-CoV-2 infection. However, previous COVID-19 may necessitate higher doses of vancomycin for CDI.