Dataset Information

Draft Genome Sequence of Two Salmonella enterica Subspecies enterica Serovar Minnesota Strains Harboring Mcr-1.1 Gene Isolated from Chicken Meat in Saudi Arabia.

ABSTRACT: Salmonella has been reported as a high-priority pathogen by the World Health Organization. Here, we report the draft genome sequence of 2 Salmonella enterica serovar Minnesota strains isolated from chicken meat in Saudi Arabia (named SA49317 and SA49319) belonging to sequence type (ST) 548, revealing mobile colistin resistance (mcr)-1.1 gene for colistin resistance.

SUBMITTER: Mukhtar LE

PROVIDER: S-EPMC9670943 | biostudies-literature | 2022 Nov

REPOSITORIES: biostudies-literature

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Draft Genome Sequence of Two Salmonella enterica Subspecies enterica Serovar Minnesota Strains Harboring Mcr-1.1 Gene Isolated from Chicken Meat in Saudi Arabia.

Mukhtar Lenah E LE Alhamed Ashwaq S AS Mujallad Mohammed I MI Alshdokhi Elaf A EA Alreshoodi Fahad M FM Al Rashidy Malfi S MS AlAkeel Saleh I SI Alajel Sulaiman M SM

Microbiology resource announcements 20221004 11

Salmonella has been reported as a high-priority pathogen by the World Health Organization. Here, we report the draft genome sequence of 2 Salmonella enterica serovar Minnesota strains isolated from chicken meat in Saudi Arabia (named SA49317 and SA49319) belonging to sequence type (ST) 548, revealing mobile colistin resistance (mcr)-1.1 gene for colistin resistance. ...[more]

PMID: 36194147

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Project description:BackgroundTyphoid fever is an acute systemic infection of humans caused by Salmonella enterica subspecies enterica serovar Typhi (S. Typhi). In chronic carriers, the bacteria survive the harsh environment of the gallbladder by producing biofilm. The phenotype of S. Typhi biofilm cells is significantly different from the free-swimming planktonic cells, and studies have shown that they are associated with antibiotic resistance, immune system evasion, and bacterial persistence. However, the mechanism of this transition and the events leading to biofilm formation are unknown. High throughput sequencing was performed to identify the genes involved in biofilm formation and to postulate the mechanism of action.ResultsPlanktonic S. Typhi cells were cultured using standard nutrient broth whereas biofilm cells were cultured in a stressful environment using high shearing-force and bile to mimic the gallbladder. Sequencing libraries were prepared from S. Typhi planktonic cells and mature biofilm cells using the Illumina HiSeq 2500 platform, and the transcriptome data obtained were processed using Cufflinks bioinformatics suite of programs to investigate differential gene expression between the two phenotypes. A total of 35 up-regulated and 29 down-regulated genes were identified. The identities of the differentially expressed genes were confirmed using NCBI BLAST and their functions were analyzed. The results showed that the genes associated with metabolic processes and biofilm regulations were down-regulated while those associated with the membrane matrix and antibiotic resistance were highly up-regulated.ConclusionsIt is proposed that the biofilm phenotype of S. Typhi allows the bacteria to increase production of the membrane matrix in order to serve as a physical shield and to adhere to surfaces, and enter an energy conservation state in response to the stressful environment. Conversely, the planktonic phenotype allows the bacteria to produce flagella and increase metabolic activity to enable the bacteria to migrate and form new colonies of infection. This data provide a basis for further studies to uncover the mechanism of biofilm formation in S. Typhi and to discover novel genes or pathways associated with the development of the typhoid carrier state.

Dataset Information

Draft Genome Sequence of Two Salmonella enterica Subspecies enterica Serovar Minnesota Strains Harboring Mcr-1.1 Gene Isolated from Chicken Meat in Saudi Arabia.

Publications

Draft Genome Sequence of Two Salmonella enterica Subspecies <i>enterica</i> Serovar Minnesota Strains Harboring <i>Mcr-</i>1.1 Gene Isolated from Chicken Meat in Saudi Arabia.

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