Background: Bacterial co-infections are frequently identified in viral respiratory infections and are significant reasons for morbidity and mortality Information on the prevalence of bacterial co-infection in patients infected with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is lacking The purpose of this study was to determine the prevalence of bacterial infections and antibiotic resistance in patients with coronavirus disease (COVID-19) Methods: In a cross-sectional study, blood culture (BC) and endotracheal aspirate (ETA) were obtained from COVID-19 patients (RT-PCR positive for SARS-CoV-2) The bacterial isolates were confirmed by the standard microbiological methods Antibiotic resistance was determined using the disk diffusion method Results: Among these 340 patients with COVID-19, a total of 43 (12 46%) patients had secondary bacterial infections The most common bacteria isolated through ETA and BC included Klebsiella species 11 (25 59%), methicillin-sensitive Staphylococcus aureus (MSSA) 9 (20 93%), Escherichia coli 7 (16 28%), methicillin-resistant Staph ylo coccus aureus (MRSA) 6 (13 95%), Enterobacter species 5 (11 63%), Streptococcus pneumoniae 1 (2 32%), and Pseudomonas aeruginosa 4 (9 30%) The results showed that Enterobacteriaceae isolates from COVID-19 patients had the highest resistance to cotrimoxazole (74%), piperacillin (67 5%), ceftazidime (47 5%), and cefepime (42 5%) All isolates were susceptible to amikacin (100%) S aureus isolates were susceptible to vancomycin (100%) and the rates of resistance to oxacillin, erythromycin and clindamycin were over (90%) P aeruginosa was susceptible (90%) to imipenem Conclusions: Bacterial co-infection is relatively infrequent in hospitalized COVID-19 patients According to the results, one of the causes of death of these patients could be a secondary infections