In vitro photoinactivation of bovine mastitis related pathogens

Photodiagnosis and Photodynamic Therapy
Fábio Parra SelleraFabio Celidonio Pogliani

Abstract

Bovine mastitis is considered the most important disease of worldwide dairy industry. Treatment of this disease is based on the application intramammary antibiotic, which favors an increase in the number of resistant bacteria in the last decade. Photodynamic inactivation (PDI) has been investigated in different areas of Health Sciences, and has shown great potential for inactivating different pathogens, without any selection of resistant microorganisms. The objective of this study was to investigate the efficacy of PDI in the inactivation of pathogens associated with bovine mastitis. We tested the effectiveness of PDI against antibiotic resistant strains, isolated from bovine mastitis, from the following species: Staphylococcus aureus, Streptococcus agalactiae, Streptococcus dysgalactiae, Corynebacterium bovis, and the alga Prototheca zopfii. Nine experimental groups were evaluated: control, no treatment; light only, irradiation of a red light-emitting diode (λ=662 (20) nm) for 180 s; exposure to 50 μM methylene blue alone for 5 min; and PDI for 5, 10, 30, 60, 120 and 180 s. S. dysgalactiae, S. aureus, and C. bovis were inactivated after 30s of irradiation, whereas S. agalactiae was inactivated after 120 s and P. zopfii at 180 ...Continue Reading

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Citations

Jan 7, 2016·Photodiagnosis and Photodynamic Therapy·Fábio Parra SelleraFabio Celidonio Pogliani
Jun 30, 2016·Photodiagnosis and Photodynamic Therapy·Kevin F Dos SantosNara C de Souza
May 2, 2017·Photodiagnosis and Photodynamic Therapy·Juliana Guerra PintoJuliana Ferreira-Strixino
Dec 12, 2017·Nanophotonics·Nasim KashefMichael R Hamblin
Jul 31, 2018·The Journal of General Virology·Amanda V TelesGuilherme R L Souza
Aug 21, 2019·Photodiagnosis and Photodynamic Therapy·Caetano P SabinoMartha S Ribeiro
Sep 12, 2020·Free Radical Biology & Medicine·Michal PieranskiMariusz Grinholc

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