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Sunday, July 7, 2019

Complete genome sequence of Mycoplasma hyopneumoniae strain KM014, a clinical isolate from South Korea.

Mycoplasma hyopneumoniae is the etiological agent of swine enzootic pneumonia, resulting in considerable economic losses in the swine industry. A few genome sequences of M. hyopneumoniae have been reported to date, implying that additional genome data are needed for further genetic studies. Here, we present the annotated genome sequence of M. hyopneumoniae strain KM014. Copyright © 2017 Han et al.

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Sunday, July 7, 2019

Closed genome sequences of seven Histophilus somni isolates from beef calves with bovine respiratory disease complex.

Histophilus somni is a fastidious Gram-negative opportunistic pathogenic Pasteurellaceae that affects multiple organ systems and is one of the principal bacterial species contributing to bovine respiratory disease complex (BRDC) in feed yard cattle. Here, we present seven closed genome sequences isolated from three beef calves showing sign of BRDC.

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Sunday, July 7, 2019

Whole-genome sequence of Chlamydia abortus strain GN6 isolated from aborted yak fetus.

The obligate intracellular Gram-negative bacterium Chlamydia abortus is one of the causative agents of abortion and fetal loss in sheep, goats, and cattle in many countries. It also affects the reproductivity of yaks (Bos grunniens). This study reports the whole-genome sequence of Chlamydia abortus strain GN6, which was isolated from aborted yak fetus in Qinghai-Tibetan Plateau, China. Copyright © 2017 Li et al.

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Sunday, July 7, 2019

A novel hybrid plasmid carrying multiple antimicrobial resistance and virulence genes in Salmonella enterica serovar Dublin.

Virulence plasmids and antibiotic resistance plasmids are usually maintained separately in Salmonella spp.; however, we report an instance of a hybrid plasmid (pN13-01125) in Salmonella enterica serovar Dublin. Review of the complete sequence of the 172,265-bp plasmid suggests that pN13-01125 is comprised of the previously described pSDVr and pSH696_135 plasmids and that the mechanism of hybridization likely involves IS6 (IS26) insertion sequence elements. The plasmid has a low conjugation frequency, confers resistance to six classes of antimicrobials, and contains a complete spv virulence operon.© Crown copyright 2017.

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Sunday, July 7, 2019

Whole-genome assembly of Babesia ovata and comparative genomics between closely related pathogens.

Babesia ovata, belonging to the phylum Apicomplexa, is an infectious parasite of bovids. It is not associated with the manifestation of severe symptoms, in contrast to other types of bovine babesiosis caused by B. bovis and B. bigemina; however, upon co-infection with Theileria orientalis, it occasionally induces exacerbated symptoms. Asymptomatic chronic infection in bovines is usually observed only for B. ovata. Comparative genomic analysis could potentially reveal factors involved in these distinguishing characteristics; however, the genomic and molecular basis of these phenotypes remains elusive, especially in B. ovata. From a technical perspective, the current development of a very long read…

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Sunday, July 7, 2019

Complete genome sequences of Clostridium perfringens Del1 strain isolated from chickens affected by necrotic enteritis.

Clostridium perfringens is ubiquitous in nature. It is a normal inhabitant in the intestinal tract of animals and humans. As the primary etiological agent of gas gangrene, necrosis and bacteremia, C. perfringens causes food poisoning, necrotic enteritis (NE), and even death. Epidemiology research has indicated that the increasing incidence of NE in poultry is associated with the withdrawal of in-feed antibiotic growth promoters in poultry production in response to government regulations. The recent omics studies have indicated that bacterial virulence is typically linked to highly efficient conjugative transfer of toxins, or plasmids carrying antibiotic-resistance traits. Currently, there is limited information…

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Sunday, July 7, 2019

Genomic analyses reveal that partial sequence of an earlier pseudorabies virus in China is originated from a Bartha-vaccine-like strain.

Pseudorabies virus (PRV), the causative agent of Aujeszky?s disease, has gained increased attention in China in recent years as a result of the outbreak of emergent pseudorabies. Several genomic and partial sequences are available for Chinese emergent and European-American strains of PRV, but limited sequence data exist for the earlier Chinese strains. In this study, we determined the complete genomic sequence of one earlier Chinese strain SC and one emergent strain HLJ8. Compared with other known sequences, we demonstrated that PRV strains from distinct geographical regions displayed divergent evolution. Additionally, we report for the first time, a recombination event between…

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Sunday, July 7, 2019

Population structure and antimicrobial resistance profiles of Streptococcus suis serotype 2 sequence type 25 strains

Strains of serotype 2 Streptococcus suis are responsible for swine and human infections. Different serotype 2 genetic backgrounds have been defined using multilocus sequence typing (MLST). However, little is known about the genetic diversity within each MLST sequence type (ST). Here, we used whole-genome sequencing to test the hypothesis that S. suis serotype 2 strains of the ST25 lineage are genetically heterogeneous. We evaluated 51 serotype 2 ST25 S. suis strains isolated from diseased pigs and humans in Canada, the United States of America, and Thailand. Whole-genome sequencing revealed numerous large-scale rearrangements in the ST25 genome, compared to the genomes…

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Sunday, July 7, 2019

Complete genome sequence of MIDG2331, a genetically tractable serovar 8 clinical isolate of Actinobacillus pleuropneumoniae.

We report here the complete annotated genome sequence of a clinical serovar 8 isolate Actinobacillus pleuropneumoniae MIDG2331. Unlike the serovar 8 reference strain 405, MIDG2331 is amenable to genetic manipulation via natural transformation as well as conjugation, making it ideal for studies of gene function. Copyright © 2016 Bossé et al.

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Sunday, July 7, 2019

Campylobacter fetus subspecies contain conserved type IV secretion systems on multiple genomic islands and plasmids.

The features contributing to differences in pathogenicity of the Campylobacter fetus subspecies are unknown. Putative factors involved in pathogenesis are located in genomic islands that encode a type IV secretion system (T4SS) and fic domain (filamentation induced by cyclic AMP) proteins, which may disrupt host cell processes. In the genomes of 27 C. fetus strains, three phylogenetically-different T4SS-encoding regions (T4SSs) were identified: one was located in both the chromosome and in extra-chromosomal plasmids; one was located exclusively in the chromosome; and one exclusively in extra-chromosomal plasmids. We observed that C. fetus strains can contain multiple T4SSs and that homologous T4SSs…

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Sunday, July 7, 2019

Complete genome sequence and methylome of Salmonella enterica subsp. enterica Cerro, a frequent dairy cow serovar.

Salmonella enterica subsp. enterica serovar Cerro is an infrequent pathogen of humans and other mammals but is frequently isolated from the hindgut of asymptomatic cattle in the United States. To further understand the genomic determinants of S. Cerro specificity for the bovine hindgut, the genome of isolate CFSAN001588 was fully sequenced and deposited in the GenBank database. Copyright © 2016 Haley et al.

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Sunday, July 7, 2019

First complete genome sequence of the Dutch veterinary Coxiella burnetii strain NL3262, originating from the largest global Q fever outbreak, and draft genome sequence of its epidemiologically linked chronic human isolate NLhu3345937

The largest global Q fever outbreak occurred in The Netherlands during 2007 to 2010. Goats and sheep were identified as the major sources of disease. Here, we report the first complete genome sequence of Coxiella burnetiigoat outbreak strain NL3262 and that of an epidemiologically linked chronic human strain, both having the outbreak-related CbNL01multilocus variable-number tandem-repeat analysis (MLVA) genotype. Copyright © 2016 Kuley et al.

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Sunday, July 7, 2019

Complete genome sequence of pseudorabies virus reference strain NIA3 using single-molecule real-time sequencing.

Pseudorabies virus (PRV) is the causative agent of Aujeszky’s disease in pigs. PRV strains are also used as model organisms for the study of alphaherpesvirus biology or for neuronal pathway studies. We present here the complete genome of the virulent wild-type PRV reference strain NIA3, determined by single-molecule real-time sequencing. Copyright © 2016 Mathijs et al.

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