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Presumed Septic Shock Caused by Actinotignum schaalii Bacteremia.

ABSTRACT: We herein report a case of presumed septic shock due to Actinotignum schaalii bacteremia with urinary tract infection. A 65-year-old Japanese man suffering from a fever was diagnosed with septic shock due to urinary tract infection. A urine sample was additionally incubated under 5% CO₂ and anaerobic conditions after A. schaalii was identified in a blood culture, but A. schaalii was not detected in the urine culture. If Gram-positive rods are observed on Gram staining of a urine sample in symptomatic patients with a predisposing urogenital condition, 5% CO₂ and an anaerobic culture of a urine sample should be performed immediately.

SUBMITTER: Hashimoto T

PROVIDER: S-EPMC8263186 | biostudies-literature | 2021 Jun

REPOSITORIES: biostudies-literature

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Presumed Septic Shock Caused by Actinotignum schaalii Bacteremia.

Hashimoto Takehiro T Ando Masaru M Komiya Kosaku K Usagawa Yuko Y Yamasue Mari M Umeki Kenji K Nureki Shin-Ichi SI Hiramatsu Kazufumi K Kadota Jun-Ichi JI

Internal medicine (Tokyo, Japan) 20210201 12

We herein report a case of presumed septic shock due to Actinotignum schaalii bacteremia with urinary tract infection. A 65-year-old Japanese man suffering from a fever was diagnosed with septic shock due to urinary tract infection. A urine sample was additionally incubated under 5% CO<sub>2</sub> and anaerobic conditions after A. schaalii was identified in a blood culture, but A. schaalii was not detected in the urine culture. If Gram-positive rods are observed on Gram staining of a urine sampl ...[more]

PMID: 33518555

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Project description:The permanent draft genome sequence of Actinotignum schaalii DSM 15541T is presented. The annotated genome includes 2,130,987 bp, with 1777 protein-coding and 58 rRNA-coding genes. Genome sequence analysis revealed absence of genes encoding for: components of the PTS systems, enzymes of the TCA cycle, glyoxylate shunt and gluconeogensis. Genomic data revealed that A. schaalii is able to oxidize carbohydrates via glycolysis, the nonoxidative pentose phosphate and the Entner-Doudoroff pathways. Besides, the genome harbors genes encoding for enzymes involved in the conversion of pyruvate to lactate, acetate and ethanol, which are found to be the end products of carbohydrate fermentation. The genome contained the gene encoding Type I fatty acid synthase required for de novo FAS biosynthesis. The plsY and plsX genes encoding the acyltransferases necessary for phosphatidic acid biosynthesis were absent from the genome. The genome harbors genes encoding enzymes responsible for isoprene biosynthesis via the mevalonate (MVA) pathway. Genes encoding enzymes that confer resistance to reactive oxygen species (ROS) were identified. In addition, A. schaalii harbors genes that protect the genome against viral infections. These include restriction-modification (RM) systems, type II toxin-antitoxin (TA), CRISPR-Cas and abortive infection system. A. schaalii genome also encodes several virulence factors that contribute to adhesion and internalization of this pathogen such as the tad genes encoding proteins required for pili assembly, the nanI gene encoding exo-alpha-sialidase, genes encoding heat shock proteins and genes encoding type VII secretion system. These features are consistent with anaerobic and pathogenic lifestyles. Finally, resistance to ciprofloxacin occurs by mutation in chromosomal genes that encode the subunits of DNA-gyrase (GyrA) and topisomerase IV (ParC) enzymes, while resistant to metronidazole was due to the frxA gene, which encodes NADPH-flavin oxidoreductase.

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Presumed Septic Shock Caused by Actinotignum schaalii Bacteremia.

Publications

Presumed Septic Shock Caused by Actinotignum schaalii Bacteremia.

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