Isolation and biological characteristics of Pseudomonas aeruginosa phage PA-27-1
Basic Medicine|更新时间:2026-01-09
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Isolation and biological characteristics of Pseudomonas aeruginosa phage PA-27-1
Journal of Third Military Medical UniversityVol. 41, Issue 4, Pages: 315-322(2019)
作者机构:
400038 重庆,陆军军医大学(第三军医大学)第一附属医院感染管理科
作者简介:
基金信息:
the Project of Technology Innovation of Social People's Livelihood of Chongqing(cstc2015shmszx120110);the Project of Medical Technology Innovation Plan in Major Clinical Program of Army and Rocket Force(SWH2017ZDCX2009)
Liu WU, Juan LUO, Zhulan YANG, et al. Isolation and biological characteristics of Pseudomonas aeruginosa phage PA-27-1[J]. Journal of Third Military Medical University, 2019, 41(4): 315-322.
DOI:
Liu WU, Juan LUO, Zhulan YANG, et al. Isolation and biological characteristics of Pseudomonas aeruginosa phage PA-27-1[J]. Journal of Third Military Medical University, 2019, 41(4): 315-322. DOI: 10.16016/j.1000-5404.201811044.
Isolation and biological characteristics of Pseudomonas aeruginosa phage PA-27-1
identify their lysis spectra and biological characteristics
and explore their application value.
Methods
2
P. aeruginosa
standard strain ATCC 27853 and the clinical isolates in our department were used as hosts to isolate and screen
P. aeruginosa
phages from the untreated hospital sewage of our hospital. Then the lysis spectra of the obtained phages were examined. The morphological and biological characteristics of the phage of highest lysis efficiency was studied.
Results
2
Six
P. aeruginosa
phages were isolated and purified from the sewage. The phage with the highest lysis efficiency (79.63%) to 162 clinical isolates with different drug susceptibilities (including 63 multi-drug resistant strains) was named PA-27-1
and the phage lysed 80.95% (51/63) resistant strains. The plaque of the phage PA-27-1 was circular
transparent
and about 2~3 mm in diameter with clear borders
on a double-layer agar plate. Its head was multi-faceted and symmetrical
its tail was short
and the optimal multiplicity of infection was 0.000 1. Eighty percent of the phage was adhered to the host after being mixed with the host bacterial solution
and the percentage was increased to 98% after incubation for 4 min. One-step growth curve of phage PA-27-1 showed that its latent period were 0 to 20 min
the burst period was 20 to 60 min
and the platform period was subsequently
and the average burst size was about 248 (tested on MOI=10). It was stable in the environment of pH 6~pH 10 and ≤50 ℃
and had high tolerance to chloroform. Its nucleic acid type was dsDNA.
Conclusion
2
P. aeruginosa
phage PA-27-1 has a broad host spectrum
strong lysis ability to multi-drug resistant strains
large burst size
good acid-base and thermal stability. It could be used as a reserve phage and provide a scientific basis for the clinical treatment of
P. aeruginosa
infection.
关键词
Keywords
references
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