# Surgical Site Preparation: Asepsis and Antisepsis Protocols


## Key Takeaways

- Surgical site preparation aims to reduce resident and transient skin microflora to subclinical levels, with inadequate preparation being a common cause of surgical site infections (SSIs).
- Clipping should be performed immediately before antisepsis using a No. 40 blade, with skin stretched taut and clipping in the direction of hair growth to minimize iatrogenic contamination.
- Chlorhexidine gluconate and povidone-iodine are standard surgical scrubs; chlorhexidine offers persistent residual activity, while povidone-iodine is inactivated by organic material and requires longer contact time.
- Allow the final antiseptic layer to air dry completely before draping to prevent bacterial migration via a capillary bridge, with impermeable drapes further reducing wicking.
- Patient assessment for factors like endocrine disease or obesity is critical, as these impair healing and increase SSI risk, necessitating potential postponement or modified approaches.
- Documentation of antiseptic agents, contact times, clipping details, and any protocol deviations is essential for post-operative SSI assessment and medicolegal purposes.

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Surgical site preparation is the systematic reduction of microbial contamination on the patient's skin before incision. It is a procedure with measurable consequences: inadequate preparation is a common cause of surgical site infection (SSI) and postoperative complications, as documented in a comparative study of preoperative antiseptics in dogs conducted at the University of Benin [comparative clinical effectiveness of preoperative skin antiseptic preparations in dogs](https://pubmed.ncbi.nlm.nih.gov/30255087/). This article provides a step-by-step reference for the practicing veterinarian preparing dogs and cats for surgery, covering patient assessment, clipping technique, skin antisepsis, and draping principles. It is written for clinicians who perform surgery routinely and who need a defensible, evidence-informed protocol instead of a generic checklist.

The clinical question this article answers is direct: how should a surgical team prepare a canine or feline patient to minimize the risk of SSI, and which antiseptic choices and techniques are supported by comparative evidence? The procedural logic follows a sequence: assess the patient, clip the hair, perform mechanical and chemical antisepsis, apply the antiseptic with correct contact time, and drape to maintain the prepared field. Each step has named failure modes, and each can be adapted to the surgical site, the patient's condition, and the available products.

## At a Glance

| Parameter | Decision or fact |
| --- | --- |
| Primary goal | Reduce resident and transient skin microflora to subclinical levels before incision |
| Clipping timing | Perform immediately before antisepsis, avoid pre-clipping hours before surgery |
| Clipper technique | Use a new or sterilized No. 40 blade, clip in the direction of hair growth, stretching skin taut |
| Antiseptic classes | Chlorhexidine gluconate and povidone-iodine are the standard surgical scrubs |
| Contact time | Allow the final antiseptic layer to dry completely before draping |
| Chlorhexidine advantage | Persistent residual activity, comparative canine data show significant bacterial reduction after scrubbing |
| Povidone-iodine caution | Inactivated by organic material, requires longer contact time for full effect |
| Alcohol use | 70% isopropyl alcohol is an effective adjunct but is flammable and must dry fully |
| Draping principle | Apply sterile drapes only after the antiseptic has dried, impermeable drapes reduce wicking |

## Physiology of Skin Microflora and Contamination

The skin of dogs and cats supports two microbial populations. Resident flora, including coagulase-negative staphylococci and micrococci, live in the stratum corneum, hair follicles, and sebaceous glands. They are difficult to remove by mechanical scrubbing alone and require chemical antisepsis. Transient flora, including *Staphylococcus aureus*, *Escherichia coli*, and other environmental organizms, sit on the skin surface and are more easily removed by detergent scrubbing. The surgical preparation protocol must address both populations, because the incision transects hair follicles and sebaceous glands, carrying surface organizms into the deeper dermis.

The bacterial burden on the skin is not uniform. Intertriginous areas, the perineum, the distal limbs, and the axilla carry higher counts than the dorsum or the lateral thorax. The surgeon should anticipate higher contamination risk at these sites and may extend the scrub time or use a second antiseptic application. The comparative study of chlorhexidine gluconate with cetrimide versus povidone-iodine in dogs demonstrated significant reductions in bacterial colony-forming units after scrubbing, with the effect measured at 0, 30, 60, and 90 minutes after preparation [comparative clinical effectiveness of preoperative skin antiseptic preparations in dogs](https://pubmed.ncbi.nlm.nih.gov/30255087/). This time course matters clinically: the antiseptic must maintain activity through the duration of the procedure, also at the moment of incision.

## Antiseptic Pharmacology and Comparative Evidence

Chlorhexidine gluconate is a cationic bisbiguanide that disrupts bacterial cell membranes. It binds to the stratum corneum and provides persistent residual activity for several hours. Povidone-iodine is an iodophor that releases free iodine, which oxidises microbial proteins and nucleotides. It has a broad spectrum but is neutralised by blood, serum, and other organic material, and its residual activity is shorter than that of chlorhexidine.

The clinical comparison in dogs found that a chlorhexidine gluconate 0.3% with cetrimide 3.0% combination produced significant bacterial reduction after scrubbing, and the difference in disinfectant effect between the chlorhexidine combination and povidone-iodine 10% was not statistically significant at all time points [comparative clinical effectiveness of preoperative skin antiseptic preparations in dogs](https://pubmed.ncbi.nlm.nih.gov/30255087/). The practical reading of this evidence is that both antiseptic classes are acceptable, but chlorhexidine offers the advantage of residual activity, which is valuable in longer procedures. Povidone-iodine remains a reasonable choice when chlorhexidine is contraindicated, such as in patients with known sensitivity, or when the surgeon prefers its faster bactericidal action.

Alcohol-based protocols have been evaluated in equine arthroscopy, where a 70% isopropyl alcohol protocol without chlorhexidine achieved immediate and sustained bacterial reductions equivalent to a chlorhexidine-based protocol, with both groups achieving at least a 2-log reduction [alcohol-based antisepsis without chlorhexidine for arthroscopy in horses](https://pubmed.ncbi.nlm.nih.gov/39709021/). This evidence is species-specific and procedure-specific, but it supports the principle that alcohol, when used with adequate contact time, is a potent antiseptic. In dogs and cats, alcohol is typically used as an intermediate step between the scrub and the final antiseptic paint, or as the sole agent in selected clean procedures. Alcohol is flammable, and the surgical team must allow complete drying before electrosurgery or laser use.

## Patient Assessment and Preparation Planning

The preoperative examination should identify factors that increase SSI risk. Endocrine disease, particularly diabetes mellitus and hyperadrenocorticism, impairs wound healing and immune function. Obesity increases the technical difficulty of preparation and draping, and the depth of the subcutaneous fat layer increases the risk of dead space. Dermatologic conditions, including pyoderma, dermatitis, and parasitic infestation, elevate the skin bacterial count and may require preoperative treatment before elective surgery. The clinician should document any skin lesion near the planned incision and decide whether to postpone the procedure or alter the approach.

The hair coat itself is a contamination source. Long or dense coats trap debris and moisture, and the clipper blade will carry surface contamination across the skin if the coat is not clean. The patient should be bathed or at least have the surgical area washed with a mild shampoo 12 to 24 hours before surgery when the condition permits. This pre-surgical bath is not a substitute for the surgical scrub, but it reduces the initial bacterial load and improves clipper performance. For emergency procedures, a dry clip followed by a prolonged antiseptic scrub is acceptable, but the surgeon should recognize the higher contamination risk.

## Preoperative Clipping and Mechanical Preparation

Clipping is the first mechanical step in surgical site preparation and the point at which most iatrogenic contamination occurs. The goal is to remove hair from a region generous enough to accommodate the planned incision, potential extension of that incision, and the margins of the drapes. For most small animal procedures, clip at least 10 to 15 cm beyond the anticipated incision boundaries in every direction. Orthopedic procedures involving joints require circumferential limb clipping to allow manipulation and assessment of limb alignment without dragging hair into the field.

Clipping should be performed in a dedicated preparation area, not in the operating theatre. The patient is positioned before clipping whenever possible, because repositioning after clipping can redistribute skin flora and environmental debris onto the prepared field. Use a number 40 blade for routine small animal work. This blade leaves approximately 0.5 mm of stubble, which is short enough to expose the skin surface to antiseptic contact while preserving the stratum corneum. A number 50 blade leaves a smoother surface but increases the risk of clipper-induced dermatitis, particularly in thin-skinned patients such as cats and sight hounds. Avoid razor shaving entirely. Razor abrasion produces microscopic nicks that harbour bacteria and increase postoperative infection risk.

Clip with the grain of the hair where practical, using light pressure and allowing the clipper head to glide instead of dig. Stretch the skin taut with the non-dominant hand to create a flat surface. Overheating of the clipper blade is a real hazard, swap blades between patients or when the blade housing becomes warm to the touch. After clipping, vacuum or wipe away loose hair with a lint roller or dry gauze. Loose hair that remains on the field becomes a wick for moisture and a vehicle for bacterial translocation during scrubbing.

Patients with heavy matting, thick coats, or skin folds may require a preliminary clip in the consultation room under sedation to allow thorough assessment of the underlying skin. This is also the time to identify dermatologic lesions that would contraindicate elective surgery at that site. Erythema, papules, pustules, self-trauma, or a greasy exudative surface should prompt postponement of elective procedures until the dermatitis has resolved.

## Antiseptic Application Sequence

The standard sequence is scrub, rinse, dry, then paint. Scrubbing combines mechanical removal of debris and transient flora with chemical antisepsis. The surgeon or assistant wears sterile gloves for the scrub and paint phases. Use sterile gauze sponges, one per stroke, and discard each sponge after a single pass to avoid returning contaminated material to the skin.

For chlorhexidine-based protocols, apply a 2% to 4% chlorhexidine gluconate solution or scrub to the clipped field. Work from the proposed incision line outward in concentric circles or parallel strokes, never returning to the center with the same sponge. Scrub for a minimum of 2 to 3 minutes for a routine clean procedure, and extend to 5 minutes for contaminated sites or orthopedic implants. Rinse thoroughly with sterile saline or water to remove residual detergent, because chlorhexidine can be inactivated by organic material and soap residue. Dry the field with sterile gauze using a blotting motion. The final paint uses a 2% chlorhexidine gluconate in 70% alcohol solution applied with a fresh sterile sponge and allowed to air dry completely. Alcohol evaporates quickly, and the residual chlorhexidine film provides persistent activity.

Povidone-iodine protocols follow the same sequence with a 7.5% scrub solution and a 10% paint solution. Iodine requires a longer contact time than chlorhexidine, typically 3 to 5 minutes of wet contact before drying, to achieve maximal bactericidal effect. The color change from brown to pale yellow indicates that the iodine has been reduced and is no longer active, at which point reapplication is needed. Comparative work in dogs has shown that chlorhexidine gluconate with cetrimide produces a greater reduction in skin bacterial colony counts than povidone-iodine at 30, 60, and 90 minutes after scrubbing, supporting chlorhexidine as the preferred agent where both are available ([comparative clinical effectiveness of preoperative skin antiseptics in dogs](https://pubmed.ncbi.nlm.nih.gov/30255087/)).

Alcohol-based protocols without chlorhexidine are an acceptable alternative in specific settings. In equine arthroscopy, a protocol using 70% isopropyl alcohol alone achieved immediate and sustained bacterial count reductions equivalent to a chlorhexidine-based protocol, with both groups achieving at least a 2-log reduction ([alcohol-based antisepsis for equine arthroscopy](https://pubmed.ncbi.nlm.nih.gov/39709021/)). This approach is relevant where chlorhexidine is contraindicated, unavailable, or where rapid preparation is required, but the lack of residual activity means the field must remain dry and undisturbed until incision.

| Antiseptic | Contact Time | Residual Activity | Organic Material Tolerance | Best Indication |
| --- | --- | --- | --- | --- |
| Chlorhexidine gluconate 2% to 4% | 2 to 3 min scrub | 4 to 6 hours | Moderate | Routine small animal surgery, orthopedic implants |
| Povidone-iodine 7.5% to 10% | 3 to 5 min wet contact | 1 to 2 hours | Poor | Patients with chlorhexidine hypersensitivity |
| 70% isopropyl alcohol | 90 s to 2 min | None | Poor | Rapid preparation, chlorhexidine unavailable |
| Chlorhexidine in alcohol paint | 30 s to dry | 4 to 6 hours | Moderate | Final paint after aqueous scrub |

## Draping Principles and Field Management

Draping begins only after the antiseptic has fully dried. Applying drapes to a wet field lifts the antiseptic onto the drape material and creates a capillary bridge for bacterial migration. Four-quarter drapes are placed first, secured with towel clamps or skin staples, followed by a fenestrated or incise drape. Incise drapes with an adhesive iodophor-impregnated film provide a physical barrier that bonds to the skin and reduces the risk of drape lift-off during the procedure.

The drape edges define the sterile field. Anything that crosses that boundary, including the surgeon's forearms, instrument tips, or suction tubing, is considered contaminated. Monitor the field throughout the procedure. Drape slippage, fluid pooling, or visible soiling at the drape-skin interface requires immediate correction with additional sterile drapes instead of repositioning the original drape.

For procedures lasting longer than 90 minutes, consider re-preparing the exposed skin edges with a chlorhexidine-alcohol paint before extending the incision or placing implants. The residual activity of chlorhexidine diminishes over time, and the skin edge adjacent to the incision is the highest-risk zone for bacterial ingress.

## Species and Procedure-Specific Modifications

Cats present two specific challenges. Their skin is thinner and more fragile than canine skin, so clipper pressure must be lighter and blade temperature monitored closely. Cats also groom the prepared site if given the opportunity, reintroducing oral flora onto the field. Ensure the patient is adequately anesthetised or sedated throughout preparation and maintain the head positioned away from the surgical field.

Obese patients require wider clipping margins because the incision may need to be extended as tissue planes are identified. The umbilicus and prepuce in male dogs are common sources of contamination and should be included in the clipped field for any caudal abdominal procedure. For mammary chain resections, clip from the xiphoid to the pubis and laterally to the flank folds to allow complete access to all mammary glands.

Dirty or contaminated wounds require a different sequence. Flush the wound with copious sterile saline before clipping to remove gross debris, then clip the surrounding hair, then perform the antiseptic scrub. Never scrub an open wound with chlorhexidine or iodine directly, because these agents are cytotoxic to exposed tissue and impair healing. The intact skin surrounding the wound is prepared normally, and the wound itself is managed with sterile saline irrigation alone.

## Documentation and Monitoring

The medical record should document the antiseptic agents used, the duration of scrubbing, the clipping date and time, and any deviations from the standard protocol. This information becomes relevant if a surgical site infection develops postoperatively, because it allows the clinician to assess whether preparation was performed within accepted parameters. Photographic documentation of the prepared field is useful for teaching and for medicolegal purposes but is not a substitute for a written record.

Intraoperative monitoring of the surgical site includes visual inspection for drape integrity, assessment of fluid accumulation, and periodic checking of the skin edges for color and viability. Excessive traction on skin retractors, prolonged exposure to irrigation fluid, and thermal injury from electrocautery all compromise the skin barrier and increase infection risk. The veterinary team should also monitor the patient's temperature throughout the procedure, because hypothermia causes peripheral vasoconstriction and reduced oxygen delivery to the surgical site, impairing the ability of local immune defenses to control bacterial contamination.

## Recognized Complications and Early Detection

Surgical site preparation failures manifest along a predictable timeline. Immediate complications include contact dermatitis, chemical burns, and hypothermia from prolonged wet contact. Delayed complications appear as surgical site infection (SSI), seroma, or wound dehiscence. Detection begins before incision. Erythema, urticaria, or wheal formation after antiseptic application indicates contact irritation, most commonly with chlorhexidine or iodophors. Blanching or eschar formation within 24 hours suggests chemical burn from pooling of antiseptic under drapes or tourniquets.

Early SSI detection relies on serial wound assessment. Swelling, heat, pain, or serous discharge on day 2 to 3 postoperatively warrants cytology and culture. A comparative study of chlorhexidine-cetrimide versus povidone iodine in dogs demonstrated significant bacterial count reduction with both agents, but neither eliminated skin flora entirely, reinforcing that residual contamination remains a risk even with correct technique [comparative clinical effectiveness of preoperative skin antiseptic preparations in dogs](https://pubmed.ncbi.nlm.nih.gov/30255087/). Fever, lethargy, or anorexia in the first 72 hours should prompt examination of the surgical site before attributing signs to other causes.

Hypothermia detection requires active temperature monitoring. Core temperature below 36.5°C during preparation increases infection risk through vasoconstriction and impaired immune function. Clip wet fur, limit scrub duration, and use warm irrigation where available.

## Common Errors and Corrective Actions

The most frequent error in teaching settings is inadequate contact time. Antiseptics require defined exposure to achieve bactericidal effect. Rushing the scrub to 30 seconds instead of the recommended 2 to 5 minutes reduces log reduction substantially. Corrective action is to time each scrub phase explicitly.

Overzealous scrubbing causes microabrasions that increase bacterial colonisation. The mechanical action should be firm but not abrasive, moving from incision site outward in concentric circles. A second common error is returning to the center after reaching the periphery, which recontaminates the prepared field.

Clipping errors include clipping too far in advance, allowing microflora repopulation, and clipping too coarsely, leaving hair stubble that harbours bacteria. Clipper blades should be changed or sterilized between patients. Vacuum-assisted clipping reduces airborne contamination.

Antiseptic pooling under the patient is frequently missed. The dependent surface collects solution, creating prolonged chemical contact and maceration. Check and dry the dependent area before draping.

## Troubleshooting Guide

| Observation | Likely Cause | Discriminating Check |
|---|---|---|
| Erythema within minutes of scrub | Contact dermatitis or hypersensitivity | Compare reaction to a small test patch on contralateral skin, discontinue offending agent |
| Wet fur or pooling under patient | Excessive solution volume or inadequate drying | Palpate dependent surfaces, extend dry time before draping |
| Poor drape adhesion | Residual moisture or emollient barrier | Wipe skin with alcohol, allow complete drying before drape application |
| Bacterial growth on culture despite preparation | Inadequate contact time or contaminated antiseptic | Review scrub timing, verify antiseptic expiry and storage |
| Clipper-induced skin abrasions | Dull blades or excessive pressure | Inspect blades, confirm sharpness and appropriate blade gap |
| Rebound contamination during surgery | Drape lift or wicking | Check drape edges, reinforce with incise drape or towel clamps |

## Limitations of Current Evidence

Comparative antiseptic trials in veterinary surgery remain limited in sample size and standardization. The chlorhexidine-cetrimide versus povidone iodine study enrolled 15 dogs with paired sides, a design that controls for individual variation but cannot address procedure-specific outcomes [comparative clinical effectiveness of preoperative skin antiseptic preparations in dogs](https://pubmed.ncbi.nlm.nih.gov/30255087/). Equine arthroscopy data suggest alcohol-based protocols perform comparably to chlorhexidine, but the study population was small and limited to clean orthopedic procedures [alcohol-based antisepsis without chlorhexidine for arthroscopy in horses](https://pubmed.ncbi.nlm.nih.gov/39709021/). Extrapolation to contaminated or long-duration procedures in dogs and cats requires caution.

Expert opinion diverges on optimal contact time, the necessity of a third scrub cycle, and whether alcohol should follow aqueous antiseptics or serve as the sole agent. Some surgeons advocate a 5-minute chlorhexidine scrub followed by alcohol rinse, others use a 2-minute scrub with alcohol alone. Both approaches have published support, but head-to-head veterinary trials are lacking. The [MSD Veterinary Manual](https://www.msdvetmanual.com/) provides general aseptic principles but does not resolve these procedural debates.

## Referral and Escalation Criteria

Referral or specialist consultation is warranted when preparation-related complications exceed routine management. Suspected anaphylaxis to antiseptics, extensive chemical burns, or progressive necrotising wound infection requires immediate escalation. The [American College of Veterinary Surgeons](https://www.acvs.org/small-animal/) maintains specialist directories and condition summaries that guide referral decisions for complex wound management.

Laboratory involvement is indicated when SSI is suspected. Aerobic and anaerobic culture with susceptibility testing should precede antimicrobial selection. Cytology showing intracellular bacteria confirms infection and guides empirical therapy while cultures incubate.

Regulatory reporting obligations vary by jurisdiction. The [AVMA practice resources](https://www.avma.org/resources-tools) and [WOAH terrestrial animal health standards](https://www.woah.org/en/what-we-do/standards/codes-and-manuals/terrestrial-code-online-access/) address reportable disease frameworks, though SSI itself is not typically reportable in companion animal practice. Clinicians should document preparation protocols, antiseptic lot numbers, and complication timelines in the medical record to support any subsequent review or investigation.

## Frequently Asked Questions

### How should I adjust surgical site preparation when running a high-volume practice with limited time?

Time constraints do not justify skipping mechanical cleaning or reducing contact time for antiseptics. The most efficient approach is to standardize a protocol that separates gross decontamination from final antisepsis. Clip the site before the patient enters the surgical suite, perform an initial scrub to remove visible debris, then apply the final antiseptic with a measured contact time while the surgeon scrubs and gowns. Foaming spray formulations of povidone-iodine have been evaluated as less labor-intensive alternatives to traditional wet scrub techniques, though comparative clinical outcomes in veterinary patients remain limited. Assign specific roles to technicians so that clipping, initial cleaning, and final antisepsis proceed without redundant steps. Document the protocol and audit compliance periodically, because inconsistent preparation is a recognized contributor to surgical site infection.

### What is the minimum acceptable preparation when chlorhexidine or povidone-iodine is unavailable?

Alcohol alone can serve as an acceptable antiseptic when standard agents are unavailable, particularly for clean procedures with short duration. A clinical study in horses undergoing arthroscopy found that a 70% isopropyl alcohol protocol produced immediate and sustained bacterial count reductions equivalent to a chlorhexidine-based protocol, with both achieving at least a 2-log reduction. The alcohol protocol used a neutral soap rough scrub followed by a 90 second sterile scrub with alcohol. Ensure the alcohol is allowed to dry completely before incision, because wet alcohol supports bacterial survival and is flammable. For contaminated or dirty procedures, postpone surgery if possible until an appropriate antiseptic can be obtained. Do not substitute household disinfectants, hand sanitisers with added emollients, or diluted products of unknown concentration.

### How does surgical site preparation differ for feline patients compared with dogs?

Feline skin is thinner and more fragile than canine skin, so clipping must use a fresh number 40 blade with light pressure to avoid razor burn and self-trauma postoperatively. Cats are more sensitive to hypothermia, so limit the clipped area to the minimum required for the approach and use warm prep solutions whenever feasible. Alcohol should be used sparingly in cats because evaporative cooling is more pronounced. Chlorhexidine is generally well tolerated in cats, but avoid pooling of solution under the patient, as prolonged skin contact can cause irritation. For procedures involving the oral cavity or mucous membranes, use povidone-iodine instead of chlorhexidine. Feline patients may require additional chemical restraint during preparation, and the entire prep process should be completed efficiently to minimize anesthetic time and heat loss.

### What documentation should be recorded for surgical site preparation?

The anesthetic or surgical record should include the date and time of clipping, the person who performed the preparation, the antiseptic agents used and their concentrations, the application method, and any deviations from the standard protocol such as an abbreviated contact time or an alternative agent. Note the condition of the skin at the time of preparation, including the presence of dermatitis, matting, or gross contamination. If a surgical site infection develops postoperatively, this documentation allows the team to determine whether preparation failures contributed. Photographs of the prepared site are useful for teaching and audit purposes. The [AVMA professional practice resources](https://www.avma.org/resources-tools) provide general guidance on medical record content, and individual practice protocols should specify the minimum documentation standard.

### How should I explain a surgical site infection to an owner when preparation was performed correctly?

Begin by stating the recognized incidence of surgical site infection despite appropriate asepsis, and avoid implying that the owner caused the problem. Explain that the skin cannot be made completely sterile, only reduced in bacterial burden, and that factors such as procedure duration, implant placement, and patient immune status influence risk. Reference the [ACVS animal health resources](https://www.acvs.org/small-animal/) for owner-facing summaries of surgical complications. Describe the specific steps taken to prevent infection, including clipping, antiseptic application, and sterile draping, so the owner understands the standard of care. Then outline the treatment plan, expected recovery timeline, and any additional costs. Offer a written summary of the discussion and a direct contact for concerns. Avoid defensive language and focus on the current management plan.

### When should I refer a case because of concerns about surgical site preparation?

Referral is appropriate when the planned procedure requires a surgical approach that cannot be prepared adequately with available facilities, such as surgery involving the oral cavity, distal limbs with severe dermatitis, or sites with heavy contamination that cannot be rendered acceptably clean. Refer also when the patient has a history of recurrent surgical site infections, suspected multidrug-resistant colonisation, or a condition requiring specialised draping such as a tourniquet or limb isolation. If the practice lacks appropriate antiseptic agents, sterile drapes, or a dedicated surgical area, referral to a facility with appropriate resources is safer than proceeding with compromised asepsis. The [WOAH terrestrial animal health standards](https://www.woah.org/en/what-we-do/standards/codes-and-manuals/terrestrial-code-online-access/) address infection control principles relevant to veterinary facilities, and the [MSD Veterinary Manual](https://www.msdvetmanual.com/) provides guidance on surgical infection risk assessment.

## Related Clinical & Scientific Guides

* [Perioperative Antibiotic Prophylaxis: Timing and Selection](/knowledge/veterinary-medicine/veterinary-surgery/perioperative-antibiotic-prophylaxis-timing-selection)
* [Surgical Approaches to the Femur and Stifle](/knowledge/veterinary-medicine/veterinary-surgery/surgical-approaches-femur-stifle)
* [Fracture Healing Assessment: Radiographic and Clinical Evaluation](/knowledge/veterinary-medicine/veterinary-surgery/fracture-healing-assessment-radiographic-clinical)


## References and Further Reading

- [Comparative clinical effectiveness of preoperative skin antiseptic preparations of chlorhexidine gluconate and povidone iodine for preventing surgical site infections in dogs.](https://pubmed.ncbi.nlm.nih.gov/30255087/). 2018.
- [Photobiomodulation and implants: implications for dentistry.](https://pubmed.ncbi.nlm.nih.gov/24455438/). 2013.
- [Foaming Betadine Spray as a potential agent for non-labor-intensive preoperative surgical site preparation.](https://pubmed.ncbi.nlm.nih.gov/25880072/). 2015.
- [Alcohol-based antisepsis without the use of chlorhexidine for arthroscopy in horses.](https://pubmed.ncbi.nlm.nih.gov/39709021/). 2025.
- [American College of Veterinary Surgeons Animal Health Resources](https://www.acvs.org/small-animal/). American College of Veterinary Surgeons.
- [MSD Veterinary Manual, Professional Edition](https://www.msdvetmanual.com/). MSD Veterinary Manual.
- [American Veterinary Medical Association Practice Resources](https://www.avma.org/resources-tools). American Veterinary Medical Association.
- [WOAH Terrestrial Animal Health Code](https://www.woah.org/en/what-we-do/standards/codes-and-manuals/terrestrial-code-online-access/). WOAH.

## Related Articles

- [Surgical Site Infection Prevention: Evidence-Based Protocols](/knowledge/veterinary-medicine/veterinary-surgery/surgical-site-infection-prevention-protocols)
- [Surgical Site Infection Diagnosis and Management](/knowledge/veterinary-medicine/veterinary-surgery/surgical-site-infection-diagnosis-management)
- [Surgical Draping Materials and Techniques for Contamination Control](/knowledge/veterinary-medicine/veterinary-surgery/surgical-draping-materials-and-techniques-for-contamination-control)
- [Surgical Scrub Techniques and Sterile Gowning Protocols](/knowledge/veterinary-medicine/veterinary-surgery/surgical-scrub-techniques-and-sterile-gowning-protocols)
- [Surgical Approaches to the Head and Neck: Oral and Pharyngeal](/knowledge/veterinary-medicine/veterinary-surgery/surgical-approaches-head-neck-oral-pharyngeal)

> This article is educational professional reference material for veterinary audiences. It is not a substitute for veterinary diagnosis, individual clinical judgment, current product labeling, or applicable regulatory requirements.