Role of Williamsia and Segniliparus in human infections with the approach taxonomy, cultivation, and identification methods

Bafghi, Mehdi Fatahi

doi:10.1186/s12941-021-00416-z

Cited by 4 publications

(1 citation statement)

References 64 publications

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“…It was first isolated in 1999 and later classified as an environmental bacterium within the genus Williamsia . Twelve species of Williamsia have been reported to date, including Williamsia aurantiacus , Williamsia deligens , Williamsia faeni , Williamsia herbipolensis , Williamsia limnetica , Williamsia maris , Williamsia marianensis , W. muralis , Williamsia phyllosphaerae , Williamsia serinedens , Williamsia spongiae and Williamsia sterculiae [ 2 ].…”

Section: Introductionmentioning

confidence: 99%

Williamsia muralis bacteraemia in a patient with Fanconi anaemia after haematopoietic cell transplantation

Sonoda,

Motomura,

Ishimura

et al. 2023

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Introduction. Williamsia muralis is an environmental bacterium first detected in 1999. Infections with W. muralis isolated have been reported in two elderly patients, and were associated with the surgical intervention of artificial objects. We present a case of bacteraemia caused by W. muralis following haematopoietic cell transplantation (HCT). Case presentation. A 10-year-old Japanese boy presented with fever and the swelling of the left cheek 8 days after HCT for the treatment of Fanconi anaemia. Gram-positive, rod-shaped bacteria were isolated from the blood cultures after 5 days incubation. 16S rRNA sequencing, but not mass spectrometry, identified a strain of W. muralis (1 414 bp, %ID 100 %). The phlegmon did not respond to antimicrobial therapy, but remitted with defervescence after a successful engraftment with teicoplanin and meropenem therapy on day 16 after HCT. The patient experienced recurrence of the bacteraemia, leading to central venous catheter (CVC) line removal. The same strain of W. muralis was isolated from the cultured tip of the CVC. To our knowledge, this is the first reported case of W. muralis bacteraemia and was complicated by CVC infection after HCT. Conclusion. W. muralis bacteraemia developed in an immunocompromised child. Introduction of artificial objects into the body raises a risk of rare infection with slowly growing environmental bacteria.

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Section: Introductionmentioning

confidence: 99%

Williamsia muralis bacteraemia in a patient with Fanconi anaemia after haematopoietic cell transplantation

Sonoda,

Motomura,

Ishimura

et al. 2023

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Magnitude of tuberculosis and its associated factors among under-five children admitted with severe acute malnutrition to public hospitals in the city of Dire Dawa, Eastern Ethiopia, 2021: multi-center cross-sectional study

2022

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Gut Microbial Adaptation to Varied Altitudes and Temperatures in Tibetan Plateau Yaks

Zhu,

Wang,

Cidan

et al. 2024

Microorganisms

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The yak (Bos grunniens) exhibits exceptional regional adaptability, enabling it to thrive in the distinctive ecological niches of the Qinghai–Tibet Plateau. Its survival relies on the intricate balance of its intestinal microbiome, essential for adapting to harsh environmental conditions. Despite the documented significance of bacteria and fungi in maintaining intestinal homeostasis and supporting immune functions, there is still a substantial gap in understanding how the composition and functionality of yak gut microbiota vary along altitude–temperature gradients. This study aims to fill this gap by employing 16S rRNA and ITS amplicon sequencing techniques to analyze and compare the intestinal microbiome of yaks residing at different elevations and exposed to varying temperatures. The findings demonstrate subtle variations in the diversity of intestinal bacteria and fungi, accompanied by significant changes in taxonomic composition across various altitudes and temperature gradients. Notably, Firmicutes, Actinobacteriota, and Bacteroidota emerged as the dominant phyla across all groups, with Actinobacteriota exhibiting the highest proportion (35.77%) in the LZF group. Functional prediction analysis revealed significant associations between the LZF group and metabolic pathways related to amino acid metabolism and biosynthesis. This suggests a potential role for actinomycetes in enhancing nutrient absorption and metabolism in yaks. Furthermore, our findings suggest that the microbiota of yaks may enhance energy metabolism and catabolism by modulating the Firmicutes-to-Bacteroidota ratio, potentially mitigating the effects of temperature variations. Variations in gut bacterial and fungal communities among three distinct groups were analyzed using metagenomic techniques. Our findings indicate that microbial genera exhibiting significant increases in yaks at lower altitudes are largely beneficial. To sum up, our research investigated the changes in gut bacterial and fungal populations of yaks residing across diverse altitude and temperature ranges. Moreover, these results enhance comprehension of gut microbial makeup and variability, offering perspectives on the environmental resilience of dry lot feeding yaks from a microbial angle.

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Role of Williamsia and Segniliparus in human infections with the approach taxonomy, cultivation, and identification methods

Cited by 4 publications

References 64 publications

Williamsia muralis bacteraemia in a patient with Fanconi anaemia after haematopoietic cell transplantation

Williamsia muralis bacteraemia in a patient with Fanconi anaemia after haematopoietic cell transplantation

Magnitude of tuberculosis and its associated factors among under-five children admitted with severe acute malnutrition to public hospitals in the city of Dire Dawa, Eastern Ethiopia, 2021: multi-center cross-sectional study

Gut Microbial Adaptation to Varied Altitudes and Temperatures in Tibetan Plateau Yaks

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