Published online Mar 6, 2022. doi: 10.12998/wjcc.v10.i7.2138
Peer-review started: September 30, 2021
First decision: December 4, 2021
Revised: December 17, 2021
Accepted: January 20, 2022
Article in press: January 20, 2022
Published online: March 6, 2022
Processing time: 152 Days and 19.5 Hours
Osteonecrosis of the femoral head (ONFH) is a frequent and refractory disease whose pathogenesis has not yet been elucidated. Infection and other factors that reduce the local blood supply can lead to bone necrosis.
To aim of this study was to assess the relationship of ONFH with bone infection by use of metagenomic sequencing.
Twelve patients with idiopathic ONFH and 12 comparable controls who were undergoing hip arthroplasty were followed up in parallel. Necrotic femoral head specimens were collected for bacterial and fungal cultures using standard methods. Bone specimens were subjected to preliminary processing, and metagenomics sequencing of microorganisms was performed. A one-way analysis of variance was used to compare bacterial species in the two groups.
Bacterial and fungal cultures exhibited no evidence of microbial growth in all isolated necrotic femoral head tissues. We thus performed metagenomic sequencing and classified the species as suspected pathogens or suspected background microorganisms based on known bacterial pathogenicity. There was no evidence of viruses, fungi, parasites, M. tuberculosis complex, or mycoplasma/chlamydia. There were also no significant differences in suspected pathogens or suspected background microorganisms (P > 0.05).
Although we found no pathogens specific for ONFH in necrotic femoral head tissue, our research provides a foundation for future research on the metagenomics of bone pathogens.
Core Tip: Osteonecrosis of the femoral head (ONFH) is a frequent and refractory disease whose pathogenesis has not been elucidated. Infection and other factors that reduce the local blood supply can lead to osteonecrosis. We performed culture and metagenomic sequencing to examine the presence of pathogens in necrotic femoral head tissue. The results confirmed the absence of viruses, fungi, parasites, or mycoplasma/chlamydia in the specimens, and no significant differences in bacterial distribution and suspected background microorganisms. Although we did not identify an ONFH-specific pathogen, our study lays the groundwork for future research on metagenomics of bone pathogens.