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Actinobacillus minor 202

ABSTRACT: Normal swine respiratory flora

PROVIDER: PRJNA32531 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	ACFT01.dat.gz	Other
	ACFT01.fasta.gz	Fasta.gz
	ACFT01.master.dat	Other
	ACFT01.dat.gz	Other

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Actinobacillus pleuropneumoniae BHI vs Koromycin

Project description:Actinobacillus pleuropneumoniae is the etiologic agent of contagious pleuropneumonia, an economically important disease of commercially reared swine throughout the world. To cause this disease, A. pleuropneumoniae must rapidly overcome porcine pulmonary innate immune defenses. Effects of koromycin, an antimicrobial agent that acts as an noncompetitive inhibitor of the interaction of NQR with its quinone substrate, on the transcriptome of A. pleuropneumoniae was investigated.

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Host responses that correlate with respiratory droplet transmission of swine-origin influenza viruses in ferrets.

Project description:The determinants of influenza transmission remain poorly understood. Swine influenza viruses preferentially attach to receptors found in the upper airways; however, most swine influenza viruses fail to transmit efficiently from swine to humans, and from human-to-human. The pandemic 2009 H1N1 (H1N1pdm) virus was a rare exception of a swine virus that acquired efficient transmissibility from human-to-human, and is reflected in efficient respiratory droplet transmission in ferrets. We hypothesize that virus-induced host responses in the upper airways correlate with airborne transmission in ferrets. To address this question, we used the H1N1pdm virus and swine influenza A/swine/Hong Kong/201/2010 (HK201) virus that has comparable titre in the ferret nasopharynx, but it exhibits differential transmissibility in ferrets via respiratory droplet route. We performed a transcriptomic analysis of tissues from the upper and lower respiratory tract from ferrets infected with either H1N1pdm or HK201 viruses using ferret-specific Agilent oligonucleotide arrays. We found differences in the kinetics of the innate immune response elicited by these two viruses that varied across tissues.

2017-03-31 | GSE79282 | GEO

Transcript profiling of Actinobacillus pleuropneumoniae in BALF

Project description:Actinobacillus pleuropneumoniae is the etiologic agent of contagious pleuropneumonia, an economically important disease of commercially reared swine throughout the world. To cause this disease, A. pleuropneumoniae must rapidly overcome porcine pulmonary innate immune defenses. Since bronchoalveolar fluid (BALF) contains many of the innate immune components found in the lung, we examined the gene expression of a virulent serovar 1 strain of A. pleuropneumoniae after exposure to concentrated BALF. This experiment was also carried out with a malT mutant of the same strain.

2009-01-06 | GSE13006 | GEO

Project description:Swine respiratory microbiome

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Effects of two-component system NarQ/P deletion on gene expression of Actinobacillus pleuropneumoniae in nitrate-rich anaerobic growth

Project description:Nitrate metabolism is an adaptation mechanism used by many bacteria for survival under anaerobic environments. As a by-product of inflammation, nitrate is used by the intestinal bacterial pathogens to enable gut infection. However, the responses of bacterial respiratory pathogens to nitrate are less well understood. Actinobacillus pleuropneumoniae is an important bacterial respiratory pathogen of swine. Previous studies have suggested that adaptation of A. pleuropneumoniae to anaerobiosis is important for infection. In this work, A. pleuropneumoniae growth and pathogenesis in response to the nitrate were investigated. Nitrate significantly promoted A. pleuropneumoniae growth under anaerobic condition in vitro and lethality in mice. By using narQ and narP deletion mutants, and single-residue mutation complementary strains of ΔnarQ, the two-component system NarQ/P were confirmed to be critical for nitrate induced growth, with Arg50 in NarQ as an essential functional residue. Transcriptome analysis showed that nitrate up-regulated multiple energy-generating pathways, including nitrate metabolism, mannose and pentose metabolism and glycerolipid metabolism via the regulation of NarQ/P. Furthermore, narQ, narP and its target gene encoding the nitrate reductase Nap contributed to the pathogenicity of A. pleuropneumoniae. The Nap inhibitor tungstate significantly reduced the survival of A. pleuropneumoniae in vivo, suggesting that Nap is a potential drug target. These results give new insights into how the respiratory pathogen A. pleuropneumoniae utilizes alternative electron acceptor nitrate to overcome the hypoxia microenvironment, which can occur in the inflammatory or necrotic infected tissues.

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2012-11-16 | E-GEOD-42317 | biostudies-arrayexpress

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