| No. | Bacterial isolates | Frequency | Percentage | Included studies |
| 1. | Staphylococcus species | 578 | 48.20 | Almaw et al. 2008 [20], Mekibib et al. 2010 [26], Abera et al. 2012 [27], Mulugeta and Wassie, 2013 [28], Herago et al. 2017 [29], Melesse and Minyahil, 2019 [30], Abebe et al. 2020 [31], Fesseha et al. 2021 [32] | 2. | Coagulase-negative staphylococci | 210 | 17.50 | Almaw et al. 2008 [20], Mekibib et al. 2010 [26], Herago et al. 2017 [29], Melesse and Minyahil, 2019 [30], Fesseha et al. 2021 [32] | 3. | Streptococcus species | 153 | 12.76 | Almaw et al. 2008 [20], Mekibib et al. 2010 [26], Abera et al. 2012 [27], Herago et al. 2017 [29], Melesse and Minyahil, 2019 [30], Abebe et al. 2020 [31], Fesseha et al. 2021[32] | 4. | Escherichia coli | 135 | 11.30 | Mekibib et al. 2010 [26], Abera et al. 2012 [27], Mulugeta and Wassie, 2013 [28], Herago et al. 2017 [29], Melesse and Minyahil, 2019 [30], Abebe et al. 2020 [31], Fesseha et al. 2021[32] | 5. | Bacillus species | 39 | 3.25 | Almaw et al. 2008 [20], Mekibib et al. 2010 [26], Abera et al. 2012 [27], Melesse and Minyahil, 2019 [30], Abebe et al. 2020 [31] | 6. | Klebsiella pneumoniae | 30 | 2.50 | Mekibib et al. 2010 [26], Abera et al. 2012 [27], Melesse and Minyahil, 2019 [30] | 7. | Corynebacterium species | 19 | 1.58 | Almaw et al. 2008 [20], Mekibib et al. 2010 [26], Mulugeta and Wassie, 2013 [28] | 8. | Enterobacter species | 16 | 1.33 | Mekibib et al. 2010 [26], Abera et al. 2012 [27], Melesse and Minyahil, 2019 [30] | 9. | Micrococcus species | 15 | 1.25 | Almaw et al. 2008 [20], Mekibib et al. 2010 [26], Abera et al. 2012 [27] | 10. | Pseudomonas species | 3 | 0.25 | Abera et al. 2012 [27] | 11. | Arcanobacterium pyogenes | 1 | 0.08 | Almaw et al. 2008 [20] |
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