Table 1 Data variables collected for each patient and definitions of their reporting

Patient signalment

Age, sex, breed, weight

Procedure performed

Clean vs. clean-contaminated vs. contaminated vs. dirty

Duration of anesthesia

Time from induction to cessation of isoflurane administration, in minutes

Perioperative antibiotic

Cefazolin 22 mg/kg IV or ampicillin/sulbactam 50 mg/kg IV

Propofol

Used vs. not used, 4–6 mg/kg IV

Preoperative skin condition

Within normal limits vs. scrub irritation vs. previous incision (within 30 days) vs. pyoderma vs. dirty

Incision length

Greater than or equal to 10 cm

Control and study sample culture identifications

Positive vs. negative, isolate

Postoperative evidence of SSI

As defined by the Center for Disease Control (CDC, Table 2)