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Efficacy of Active Immunization With Attenuated α-Hemolysin and Panton-Valentine Leukocidin in a Rabbit Model of Staphylococcus aureus Necrotizing Pneumonia
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Efficacy of Active Immunization With Attenuated α-Hemolysin and Panton-Valentine Leukocidin in a Rabbit Model of Staphylococcus aureus Necrotizing Pneumonia
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Efficacy of Active Immunization With Attenuated α-Hemolysin and Panton-Valentine Leukocidin in a Rabbit Model of Staphylococcus aureus Necrotizing Pneumonia
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Journal Article
Efficacy of Active Immunization With Attenuated α-Hemolysin and Panton-Valentine Leukocidin in a Rabbit Model of Staphylococcus aureus Necrotizing Pneumonia
2020
Overview
Staphylococcus aureus is a common pathogen causing infections in humans with various degrees of severity, with pneumonia being one of the most severe infections. In as much as staphylococcal pneumonia is a disease driven in large part by α-hemolysin (Hla) and Panton-Valentine leukocidin (PVL), we evaluated whether active immunization with attenuated forms of Hla (HlaH35L/H48L) alone, PVL components (LukS-PVT28F/K97A/S209A and LukF-PVK102A) alone, or combination of all 3 toxoids could prevent lethal challenge in a rabbit model of necrotizing pneumonia caused by the USA300 community-associated methicillin-resistant S. aureus (MRSA). Rabbits vaccinated with Hla toxoid alone or PVL components alone were only partially protected against lethal pneumonia, whereas those vaccinated with all 3 toxoids had 100% protection against lethality. Vaccine-mediated protection correlated with induction of polyclonal antibody response that neutralized not only α-hemolysin and PVL, but also other related toxins, produced by USA300 and other epidemic MRSA clones.
Publisher
Oxford University Press
Subject
/ BACTERIA
/ Bacterial Toxins - administration & dosage
/ Bacterial Toxins - immunology
/ Exotoxins - administration & dosage
/ Hemolysin Proteins - administration & dosage
/ Hemolysin Proteins - immunology
/ Histocompatibility antigen HLA
/ Humans
/ Leukocidins - administration & dosage
/ Methicillin-Resistant Staphylococcus aureus
/ Pneumonia, Necrotizing - immunology
/ Pneumonia, Necrotizing - prevention & control
/ Pneumonia, Staphylococcal - immunology
/ Pneumonia, Staphylococcal - prevention & control
/ Rabbits
/ Toxoids
