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Archives of Virology

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01.08.2012 | Original Article

Novel lytic bacteriophage AB7-IBB1 of Acinetobacter baumannii: isolation, characterization and its effect on biofilm

verfasst von: Ajinkya B. Yele, Nikhil D. Thawal, Praveen K. Sahu, Balu A. Chopade

Erschienen in: Archives of Virology | Ausgabe 8/2012

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Abstract

Acinetobacter baumannii infections are difficult to treat due to biofilm formation. The literature shows paucity of data on A. baumannii bacteriophages and their application in biofilm control. In this report, we have isolated a new lytic bacteriophage, AB7-IBB1, infecting A. baumannii. Transmission electron microscopy revealed its resemblance to members of the family Siphoviridae, with a tail size of 240 × 10 nm and an icosahedral head 50 nm in diameter. Plaques were 3-5 mm in diameter after 24 h, increasing to 7-9 mm in three days. The phage genome size was determined to be ~75 kb. AB7-IBB1 could lyse 23 of 39 (59 %) clinical isolates of A. baumannii. It exhibited rapid adsorption (>99 % adsorbed in 5 min), a latency period of 30 min and a burst size of 125 PFU/infected cell. The phage affected A. baumannii biofilm formation on an abiotic surface (polystyrene) and a biotic surface (human embryonic kidney 293 cell line). It also showed biofilm control ability on an abiotic surface (polystyrene). FESEM visualization studies confirmed the detrimental effect of phage AB7-IBB1 on host biofilm. In conclusion, this study reports a novel lytic bacteriophage, AB7-IBB1, belonging to family Siphoviridae, with promising anti-biofilm properties.

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Titel: Novel lytic bacteriophage AB7-IBB1 of Acinetobacter baumannii: isolation, characterization and its effect on biofilm
verfasst von: Ajinkya B. Yele
Nikhil D. Thawal
Praveen K. Sahu
Balu A. Chopade
Publikationsdatum: 01.08.2012
Verlag: Springer Vienna
Erschienen in: Archives of Virology / Ausgabe 8/2012
Print ISSN: 0304-8608
Elektronische ISSN: 1432-8798
DOI: https://doi.org/10.1007/s00705-012-1320-0

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