Surgical site infections are one of the most common complications after an operation, but the risk is genuinely lower than many people assume, and there is a lot you can do to bring it down even further. Understanding what actually helps, both from your hospital’s side and your own, can take some of the worry out of preparing for surgery.
This article explains what a surgical site infection is, who is more likely to be affected, and the practical steps, both from your care team and from you, that make a real difference to your risk before, during and after your operation.
What Counts as a Surgical Site Infection?
A surgical site infection, often shortened to SSI, is an infection that develops at or near the location of a surgical cut.
These infections are defined as occurring within 30 days of a procedure, or within 90 days if a prosthetic device such as a joint implant was used. They can be superficial, affecting only the skin, or deeper, involving underlying tissue or muscle, with deep infections generally being more serious and requiring closer medical attention.
It is worth knowing that surgical site infections in Australia are relatively uncommon compared with many other parts of the world, thanks to strong infection control standards in hospitals.
Who Is More Likely to Be Affected
Some factors that raise the risk of infection are outside your control, while others can genuinely be managed before surgery.
Patient-Related Factors
Research consistently links higher infection risk to factors including advanced age, poorly controlled diabetes, immunosuppressed conditions, obesity and smoking, many of which can be improved to some degree in the lead up to surgery.
Surgery-Related Factors
The type of surgery also matters. Longer procedures, emergency operations, and surgeries involving contaminated tissue generally carry a higher infection risk than shorter, planned procedures on clean tissue.
Where and How the Surgery Is Performed
System-related factors also play a role, since inadequate adherence to infection control protocols, inappropriate antibiotic timing and insufficient sterilisation practices can all contribute to infection risk, which is why hospitals invest heavily in standardised procedures around every operation.
What Your Hospital and Surgical Team Do to Reduce Risk
Hospitals follow well-established protocols specifically designed to reduce the chance of infection during and after your operation.
- Preadmission skin cleansing recommendations before surgery
- Appropriate antibiotics given at the right time before incision
- Sterile technique and equipment throughout the procedure
- Careful wound closure and dressing techniques
Australian guidelines updated in 2019 recommend measures such as antimicrobial-coated sutures and double-ring wound protectors as effective strategies for reducing surgical site infection risk, reflecting international best practice and ongoing efforts to keep infection rates as low as possible.
What You Can Do Before Surgery
While your hospital carries much of the responsibility, there are meaningful steps you can take yourself in the weeks leading up to your operation.
- Manage blood sugar levels closely if you have diabetes
- Stop or reduce smoking, since it impairs wound healing
- Follow any pre-surgery showering or skin preparation instructions exactly
- Let your surgical team know about any current infections or skin issues
Reaching a healthier weight where possible, and eating a nutritious diet with adequate protein, can also support your body’s ability to heal and fight off infection after surgery. None of these steps guarantee prevention, but together they genuinely tilt the odds in your favour.
What Actually Causes These Infections
Surgical site infections generally come from bacteria, often ones that are naturally present on your own skin rather than picked up from elsewhere in the hospital.
Among the most common culprits are Staphylococcus aureus and related bacteria, including antibiotic-resistant strains such as MRSA, which is one reason hospitals take skin preparation and antibiotic timing so seriously before an incision is made.
This is also why pre-surgery skin cleansing instructions matter more than they might seem to on the surface. Reducing the bacterial load on your skin before surgery genuinely lowers the chance those same bacteria end up causing a problem at the incision site.
Caring for Your Wound After Surgery
Your role in preventing infection continues well after you leave the operating theatre.
- Keep your wound clean and dry as instructed by your care team
- Wash your hands before touching your dressing or wound area
- Attend all scheduled wound checks and follow-up appointments
- Avoid picking at scabs or removing dressings early
Getting enough sleep and rest during recovery also supports your immune system, which plays a direct role in how effectively your body defends against infection while healing. Staying well hydrated and eating properly in the days after surgery supports the same process.
Warning Signs to Watch For
Most wounds heal without any issue, but it helps to know what is not normal.
Increasing redness, warmth, swelling, unusual discharge, a fever, or worsening pain around your surgical site, particularly after the first few days, are all reasons to contact your surgical team promptly rather than waiting to see if things improve on their own. Trust your instincts here, since you know your own body better than anyone reading a general guide.
Conclusion
Surgical site infections are a genuine but generally manageable risk, and a combination of hospital protocols and your own preparation can meaningfully lower the chance of one occurring. Knowing what to expect, and what warning signs matter, puts you in a stronger position throughout your recovery, rather than leaving you unsure of what is normal.
If you have questions about your own infection risk ahead of surgery, raise them with your surgeon or GP well before your procedure. You can also visit surgery.com.au to find surgeons and specialists across major Australian cities and read more articles on surgical preparation and recovery.
FAQs
1. How common are surgical site infections in Australia?
They are relatively uncommon, with reported rates around 2 to 3 per cent historically, reflecting strong infection control standards across Australian hospitals compared with many other regions around the world.
2. Can smoking really affect my infection risk?
Yes. Smoking impairs wound healing and blood flow to tissue, which increases the risk of surgical site infection. Even short-term cessation before surgery can help reduce this risk to some degree.
3. What are the early signs of a surgical site infection?
Increasing redness, warmth, swelling, unusual discharge, fever or worsening pain around the wound are key signs to watch for and report to your care team promptly rather than waiting.
4. Does having diabetes increase my infection risk?
Poorly controlled blood sugar levels are linked to a higher risk of surgical site infection, so working with your doctor to manage diabetes well before surgery can genuinely help lower this risk.
5. How long after surgery can an infection develop?
Surgical site infections are generally defined as occurring within 30 days of a procedure, or within 90 days if a prosthetic implant was used, so it is worth staying alert to symptoms during this window.