Auxotrophic Actinobacillus pleurpneumoniae grows in multispecies biofilms without the need for nicotinamide-adenine dinucleotide (NAD) supplementation

BMC Microbiology

Research Article

Abraham Loera-Muro¹  Francisco J. Avelar-González¹  Alma L. Guerrero-Barrera²  Ricardo Oropeza-Navarro³  Mario Jacques⁴  Yannick D. N. Tremblay⁴  Josée Labrie⁴ 

[1] Centro de Ciencias Básicas, Universidad Autónoma de Aguascalientes, 20131, Aguascalientes, Ags., Mexico;Centro de Ciencias Básicas, Universidad Autónoma de Aguascalientes, 20131, Aguascalientes, Ags., Mexico;Laboratorio de Biología Celular y Tisular, Departamento de Morfología, Centro de Ciencias Básicas, Universidad Autónoma de Aguascalientes, 20131, Aguascalientes, Ags., Mexico;Departamento de Microbiología Molecular, Instituto de Biotecnología, Universidad Nacional Autónoma de México, 62260, Cuernavaca, Morelos, Mexico;Groupe de recherche sur la maladies infectieuses du porc, Faculté de médecine vétérinaire, Université de Montréal, J2S 7C6, St-Hyacinthe, Québec, Canada;

关键词: Biofilms;    Actinobacillus pleuropneumoniae;    Streptococcus suis;    Bordetella bronchiseptica;    Pasteurella multocida;    Staphylococcus aureus;    Escherichia coli;    Pyridine compounds;   

DOI  :  10.1186/s12866-016-0742-3

 received in 2015-06-24, accepted in 2016-06-15,  发布年份 2016

来源: Springer

【 摘 要 】

BackgroundActinobacillus pleuropneumoniae is the etiologic agent of porcine contagious pleuropneumonia, which causes important worldwide economic losses in the swine industry. Several respiratory tract infections are associated with biofilm formation, and A. pleuropneumoniae has the ability to form biofilms in vitro. Biofilms are structured communities of bacterial cells enclosed in a self-produced polymer matrix that are attached to an abiotic or biotic surface. Virtually all bacteria can grow as a biofilm, and multi-species biofilms are the most common form of microbial growth in nature. The goal of this study was to determine the ability of A. pleuropneumoniae to form multi-species biofilms with other bacteria frequently founded in pig farms, in the absence of pyridine compounds (nicotinamide mononucleotide [NMN], nicotinamide riboside [NR] or nicotinamide adenine dinucleotide [NAD]) that are essential for the growth of A. pleuropneumoniae.ResultsFor the biofilm assay, strain 719, a field isolate of A. pleuropneumoniae serovar 1, was mixed with swine isolates of Streptococcus suis, Bordetella bronchiseptica, Pasteurella multocida, Staphylococcus aureus or Escherichia coli, and deposited in 96-well microtiter plates. Based on the CFU results, A. pleuropneumoniae was able to grow with every species tested in the absence of pyridine compounds in the culture media. Interestingly, A. pleuropneumoniae was also able to form strong biofilms when mixed with S. suis, B. bronchiseptica or S. aureus. In the presence of E. coli, A. pleuropneumoniae only formed a weak biofilm. The live and dead populations, and the matrix composition of multi-species biofilms were also characterized using fluorescent markers and enzyme treatments. The results indicated that poly-N-acetyl-glucosamine remains the primary component responsible for the biofilm structure.ConclusionsIn conclusion, A. pleuropneumoniae apparently is able to satisfy the requirement of pyridine compounds through of other swine pathogens by cross-feeding, which enables A. pleuropneumoniae to grow and form multi-species biofilms.

【 授权许可】

CC BY   
© The Author(s). 2016