Hi fenr65 and welcome to the forum.
First things first: as your myeloma is smouldering, it could be worse. How are your bloods (neutrophils seem to be the most relevant here)?
Getting antibiotics was the right thing to do.
Advice from AI:
Recommended Precautions & Action Plan
If someone with SMM is scratched or bitten by a cat:
Immediate Wound Care:
Immediately wash the area with soap and warm running water for at least 5 minutes.
Apply an antiseptic (e.g., povidone-iodine or chlorhexidine) and cover with a clean bandage.
Low Threshold for Medical Evaluation:
Contact a primary care physician or hematologist promptly. Due to the reduced immune clearance, doctors often have a lower threshold for prescribing prophylactic antibiotics (such as amoxicillin-clavulanate or doxycycline) for scratches or punctures from animals.
Monitor for Warning Signs:
Watch closely for redness expanding beyond the wound, severe pain, swelling within 2 to 24 hours, pus, unexplained fever, chills, or enlarged lymph nodes (under the armpits, neck, or groin).
Preventative Steps with Household Cats:
Keep domestic cats indoors to reduce their exposure to fleas (B. henselae vector).
Use regular flea prevention treatments on pets.
Avoid rough play that leads to scratches or bites, and do not allow cats to lick open skin wounds.”