Abstract
The diverse environmental distribution of Salmonella makes it a global source of human gastrointestinal infections. This study aimed to detect Salmonella spp. and explore their diversity and antimicrobial susceptibility patterns in clinical and environmental samples. Pre-enrichment, selective enrichment, and selective plating techniques were adopted for the Salmonella detection whereas the API 20E test and Vitek Compact 2 system were used to confirm the identity of isolates. Salmonella serovars were subjected to molecular confirmation by 16S rDNA gene sequencing. Disc diffusion method and Vitek 2 Compact system determined the antibiotic susceptibility of Salmonella serovars. Multiple antibiotic resistance index (MARI) was calculated to explore whether Salmonella serovars originate from areas with heavy antibiotic usage. Results depicted low Salmonella prevalence in clinical and environmental samples (3.5%). The main detected serovars included Salmonella Typhimurium, S. enteritidis, S. Infantis, S. Newlands, S. Heidelberg, S. Indian, S. Reading, and S. paratyphi C. All the detected Salmonella serovars (27) exhibited multidrug resistance to three or more antimicrobial classes. The study concludes that the overall Salmonella serovars prevalence was found to be low in environmental and clinical samples of Western Saudi Arabia (Makkah and Jeddah). However, antimicrobial susceptibility patterns of human and environmental Salmonella serovars revealed that all isolates exhibited multidrug-resistance (MDR) patterns to frequently used antibiotics, which might reflect antibiotic overuse in clinical and veterinary medicine. It would be suitable to apply and enforce rules and regulations from the One Health approach, which aim to prevent antibiotic resistance infections, enhance food safety, and improve human and animal health, given that all Salmonella spp. detected in this investigation were exhibiting MDR patterns.
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The authors extend their gratitude to Ms. Hayat Ashi and Ms. Hiyam Abureesh for helping with sampling, and Mr. Meshal Almalki for technical assistance.
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Research design: Hussein H. Abulreesh, Leena A. Neyaz, Khaled Elbanna. Conducting experiments: Hajrah A. Khan, Wafa A. Alshehri, Fatimah H. Asiri, Hussein H. Abulreesh, Leena A. Neyaz. Data curation and analysis: Sameer R. Organji, Hesham A. Malak, Khaled Elbanna, Mohammad S. Aldosari. Writing—first draft: Hussein H. Abulreesh, Leena A. Neyaz. Writing—final draft and editing: Hussein H. Abulreesh. All authors have read and agreed to the published version of the manuscript.
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Khan, H.A., Neyaz, L.A., Malak, H.A. et al. Diversity and antimicrobial susceptibility patterns of clinical and environmental Salmonella enterica serovars in Western Saudi Arabia. Folia Microbiol (2024). https://doi.org/10.1007/s12223-024-01172-1
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DOI: https://doi.org/10.1007/s12223-024-01172-1