Prevalence of Chronic Wounds Microbial Contaminations and their Susceptibility Pattern to Current Antibiotics in Mbingo and Nkwen Baptist Hospitals

Abstract

Abstract BACKGROUND: Antimicrobial resistance among pathogens causing chronic wound infections is a growing concern, particularly in low-income countries. Understanding the microbial profile and antibiotic susceptibility patterns in chronic wounds is crucial for guiding effective treatment strategies. This study aimed to investigate the prevalence of microbial contamination and antibiotic susceptibility patterns in chronic wounds among patients treated at Mbingo Baptist Hospital and Nkwen Baptist Hospital in Northwest Cameroon. METHODS: A cross-sectional, hospital-based study was conducted from March to June 2022. Wound samples were collected from patients with chronic wounds, and microbiological analyses were performed to identify the isolates and assess their antimicrobial susceptibility. RESULTS: A total of 54 chronic wounds were examined, with venous ulcers being the most common type (42.6%). Bacterial and fungal growth was detected in 89% of the wound swabs. Gram-negative bacteria, including Salmonella spp. (14.8%) and Pseudomonas aeruginosa (7.4%), were frequently isolated, along with Gram-positive organisms such as Staphylococcus aureus (18.5%) and Staphylococcus spp. (11.1%). Polymicrobial infections were observed in 11.2% of the cases. The isolates exhibited high-resistance rates to commonly used antibiotics, such as sulfamethoxazole/trimethoprim (83%), amoxicillin (80.9%), ceftriaxone (74.5%), azithromycin (66%), and doxycycline (61.7%). Diphtheria spp. and S. aureus showed resistance to nearly all the tested antibiotics. CONCLUSION: This study highlights the significant burden of antimicrobial-resistant bacteria in chronic wound infections in the studied health-care facilities in Cameroon. These findings underscore the urgent need for improved antimicrobial stewardship and the development of novel treatment strategies to address the growing challenge of drug-resistant pathogens in chronic wound management.