Related Experiment Video
Updated: May 14, 2026
Isolation, Characterization, and Total DNA Extraction to Identify Endophytic Fungi in Mycoheterotrophic Plants
Published on: May 5, 2023
Isolation and characterization of Pigmentiphaga-like isolates from human clinical material
Natalie Bridger1,2, Steven Drews3,4, Tamara Burdz5
1Memorial University, St John's NL, Canada.
Abstract:
Species in the genus Pigmentiphaga are Gram-negative, catalase- and oxidase-positive rods derived exclusively to date from environmental sources. Features of strains most like Pigmentiphaga daeguensis or Pigmentiphaga kullae from a case of suppurative otitis media in a 6-year-old female post-transplant recipient and in a human stool sample are described.
Insights
Pigmentiphaga bacteria, typically found in the environment, were identified in a human ear infection and stool sample. This expands the known habitats of these Gram-negative bacteria.
Area of Science:
- Microbiology
- Bacteriology
Background:
- The genus Pigmentiphaga comprises Gram-negative, catalase- and oxidase-positive rods.
- These bacteria have been exclusively isolated from environmental sources.
Observation:
- Strains resembling Pigmentiphaga daeguensis and Pigmentiphaga kullae were identified.
- These isolates originated from a case of suppurative otitis media in a pediatric post-transplant patient.
- One isolate was also recovered from a human stool sample.
Findings:
- This study describes the characteristics of Pigmentiphaga strains found in clinical and human fecal samples.
- It represents the first reported instances of Pigmentiphaga isolation from human sources.
Implications:
- The findings suggest that Pigmentiphaga species may have a broader host range than previously understood.
- This expands the potential clinical relevance of this bacterial genus.
- Further research is warranted to understand the pathogenicity and ecological role of Pigmentiphaga in human-associated environments.
