Cupriavidus pauculus (C. pauculus) is a gram-negative, aerobic, non-lactose-fermenting, motile bacilli with flagella commonly found in environmental samples from the soil and water, including human samples. C. pauculus was formerly known as Ralstonia paucula. Due to the rarity of infection, there is limited understanding of its pathogenesis, but they seem to follow similar trends of other rare opportunistic bacterial infections. Cupriavidus gilardii, Cupriavidus pauculus and Cupriavidus metallidurans have all been implicated in human infections and manifest into a variety of community and nosocomial infections including respiratory infections, meningitis, tenosynovitis, cellulitis, septic arthritis, peritonitis, and sepsis. C. pauculus has the greatest link to opportunistic infection and outbreaks and has been identified in all patients, with most severe cases linked to newborns and the immunocompromised. As such, data for determining antibiotic susceptibility is limited to case reports which typically start with empiric treatment, followed by susceptibility testing to optimize treatment. [1], [2], [3]
A 2020 in vitro study in France performed a test to determine the minimum inhibitory capacity (MIC) of 20 antibiotics for a panel of Cupriavidus clinical strains, mainly from respiratory samples of patients with cystic fibrosis. The experimental panel consisted of 18 strains, including 5 C. pauculus strains. As the C. pauculus and C. metallidurans exhibit similar susceptibility profiles, they were included in the final analysis as a single group. Based on the results, minocycline was the most active antibiotic with very low MICs and 100% susceptibility rate. Cefepime was also highly effective and exhibited similar susceptible and resistant breakpoints. Aminoglycosides were poorly active against Cupriavidus strains and while fluoroquinolones were active against over 80% of Cuprivadus strains, susceptibility was not great for C. pauculus and C. metallidurans. While the findings support use of minocycline and cefepime, clinical data is needed to confirm the optimal treatment of Cupriavidus infections. See Table 1 for reported MICs of C. pauculus and C. metallidurans strains. [1], [2], [3]
A total of 651 differential genes were screened. Twelve co-expression modules were obtained via WGCNA; of which, one hub module (black module) had the highest correlation with ANCA-GN. A total of 66 intersecting genes were acquired by combining differential genes. Five hub genes were subsequently obtained by lasso analysis as potential biomarkers for ANCA-GN. The immune infiltration results revealed the most significant relationship among monocytes, CD4+ T cells and CD8+ T cells. ROC curve analysis demonstrated a prime diagnostic value of the five hub genes. According to the functional enrichment analysis of the differential genes, hub genes were mainly enhanced in immune- and inflammation-related pathways.
A total of 651 differential genes were screened. Twelve co-expression modules were obtained via WGCNA; of which, one hub module (black module) had the highest correlation with ANCA-GN. A total of 66 intersecting genes were acquired by combining differential genes. Five hub genes were subsequently obtained by lasso analysis as potential biomarkers for ANCA-GN. The immune infiltration results revealed the most significant relationship among monocytes, CD4+ T cells and CD8+ T cells. ROC curve analysis demonstrated a prime diagnostic value of the five hub genes. According to the functional enrichment analysis of the differential genes, hub genes were mainly enhanced in immune- and inflammation-related pathways.