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Bacterial growth associated with metallic implants in dogs
M M Smith1, P B Vasseur, H M Saunders
1Veterinary Medical Teaching Hospital, University of California, Davis 95616.
Journal of the American Veterinary Medical Association
|September 15, 1989
Summary
Bacteria were frequently found at the implant-bone interface in dogs, suggesting a higher risk of infection after orthopedic surgery involving implants. This highlights the importance of sterile techniques and monitoring for complications.
Area of Science:
- Veterinary Orthopedics
- Bacteriology
- Implant-Associated Infections
Background:
- Orthopedic implants like plates and screws are used to treat fractures and joint fusions in dogs.
- Understanding the potential for bacterial contamination at the implant-bone interface is crucial for patient outcomes.
Purpose of the Study:
- To investigate the prevalence of bacterial isolation from the interface of removed orthopedic implants in dogs.
- To compare bacterial presence in implants from healed sites versus control orthopedic procedures.
Main Methods:
- Bacteriologic cultures were performed on tissue and swab specimens from the operative wound sites of 40 dogs after implant removal.
- Control cultures were obtained from 30 dogs undergoing clean elective orthopedic procedures without implants.
- Statistical analysis was used to compare bacterial isolation rates between groups.
Main Results:
- Bacteria were isolated from the plate-bone interface in 17 out of 40 dogs (42.5%) with implants.
- A significant difference (P < 0.01) was observed in bacterial isolation rates between the implant group and the control group (2 out of 30 dogs).
- Complications such as osteomyelitis were more frequent in dogs with positive cultures from implant sites.
Conclusions:
- A substantial proportion of orthopedic implants in dogs harbor bacteria at the bone interface, even after fracture healing.
- The presence of bacteria is significantly higher in implant cases compared to non-implant orthopedic procedures.
- Further research into preventative strategies and management of subclinical implant-associated bacterial colonization is warranted.