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Isolation and sensitivity pattern of bacterial isolates of wound infections from patients of Federal Medical Centre, Umuahia, Abia State

Purulent specimens were aseptically collected using swab sticks from 56 patients with different wound infections at the Federal Medical Centre (FMC), Umuahia, Abia State. The wound specimens comprising burns (8), post-operative (12), trauma (11), abscesses (14) and boils (11) were subjected to bacteriological analyses using standard methods. A total of 78 isolates were recovered from the specimens giving rise to two gram positive bacteria (Staphylococcus aureus and Streptococcus species) and five gram negative bacteria (Pseudomonas aeruginosa, Klebsiella species, Enterobacter species, Escherichia coli and Proteus species). S. aureus was the most predominant microorganism constituting 22% of the total isolates recovered from these wound types while wounds from burns gave the highest number of isolates (21). Male patients were found to have more wound specimens (35) and isolates (67.9%) than the female gender (21, 32.1%). Streptococcus species was most sensitive to Gentamycin (21.6) followed by Staphylococcus aureus and to Gentamycin too, however, the two pathogens were completely resistant to Cloxacillin and Augmentin, respectively and in addition, S. aureus was also completely resistant to Tetracycline and Cotrimoxazole. Enterobacter species was most sensitive (among the gram negative bacteria) to Ceftazidine antibiotic (26.6), but showed 100% resistance to Erythromycin and Cotrimoxazole respectively. P. aeruginosa was completely resistant to five antibiotics: Cloxacillin, Ceftriaxone, Erythromycin, Cephalaxin and Clavulante and this was the highest resistance recorded among the Gram negative isolates. The bacterial pathogens isolated from the wound infections analyzed here are S. aureus, Pseudomonas aeruginosa, Klebsiella species, Enterobacter species, Streptococcus species, Escherichia coli and Proteus species in that order. Both Gram positive and negative bacteria were implicated with the latter group being more in occurrence. The high level of resistance to antibiotics recorded here is a cause for concern in wound therapy and management. K e y w o r d s