Background and study aim: The coronavirus disease pandemic of 2019 (COVID-19) has created global health and economic ‎implications. All potential biomarkers, risk factors, therapy and preventative measures of the ‎disease has been thoroughly investigated. This study examined the relationship between ‎eosinophils and COVID-19 severity, as well as other clinical and laboratory markers of the disease‎‎‎‎.
Patients and Methods: ‎‎‎ In this retrospective study, we collected data from 162 patients' medical records including baseline ‎complete blood counts with differential total leucocytic counts (TLC). Descriptive and comparative ‎statistics were performed‎‎.‎
Results: Regarding disease severity, TLC significantly increased (p=0.019) and lymphocyte count ‎significantly decreased (p=0.003) with more severe disease but eosinophil count showed no ‎significant differences (p= 0.864). Patients admitted to the ICU showed no significant difference in ‎eosinophil count (p=0.551), they had significantly higher TLC (p≤0.001) and significantly lower ‎lymphocyte count (p≤0.001). No significant correlations (p > 0.05) were found between eosinophil ‎count and any of the laboratory markers of the disease, age of patients, or length of hospital stay‎‎‎.
Conclusion: Eosinophil count had no correlation with COVD-19 severity, while lymphopenia was a poor ‎prognostic marker‎‎‎‎‎‎‎.