PuSH - Publikationsserver des Helmholtz Zentrums München: Sewage and sewage-contaminated environments are the most prominent sources to isolate phages against <em>Pseudomonas aeruginosa</em>.

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Aghaee, B.L.* ; Mirzaei, M.K. ; Alikhani, M.Y.* ; Mojtahedi, A.*

Sewage and sewage-contaminated environments are the most prominent sources to isolate phages against Pseudomonas aeruginosa.

BMC Microbiol. 21:132 (2021)

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BACKGROUND: P. aeruginosa is the primary source of hospital-acquired infections. Unfortunately, antibiotic resistance is growing to precariously high levels, making the infections by this pathogen life-threatening and hard to cure. One possible alternative to antibiotics is to use phages. However, the isolation of phages suitable for phage therapy- be lytic, be efficient, and have a broad host range -against some target bacteria has proven difficult. To identify the best places to look for these phages against P. aeruginosa we screened hospital sewages, soils, and rivers in two cities. RESULTS: We isolated eighteen different phages, determined their host range, infection property, and plaque morphology. We found that the sewage and sewage-contaminated environments are the most reliable sources for the isolation of Pseudomonas phages. In addition, phages isolated from hospital sewage showed the highest efficiency in lysing the bacteria used for host range determination. In contrast, phages from the river had larger plaque size and lysed bacteria with higher levels of antibiotic resistance. CONCLUSIONS: Our findings provided additional support for the importance of sewage as the source of phage isolation.

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