HealthTap Online Primary Care Doctors Accepting New Patients
Book a video visit
HealthTap
Telehealth
A member asked:

Culture of leg taken after doc already treated it for mrsa w/bactrim & top antib; test then back neg (false neg?). antib in sys how lg? retest when?

A doctor has provided 1 answer

Test of cure: Cultures are often taken following treatment of an infection to confirm that they were cured with the chosen antibiotic. Persistent symptoms after treatment with a negative bacterial culture is suggestive of another type of infection, such as fungal or viral.

Dr Fowler and another doctor agreed

Answered 10/25/2014

3.6k views

Thank

Related Questions

A member asked:

Had a large right leg turf burn wound that got infected july 4th. i was on cephalxin this whole month, untill 7/28/2021. i went to a clinic and he precribed me a bactrim. i went to another doc, and he said it was not infected anymore.white still?

3 doctors weighed in across 2 answers

A member asked:

My dermatologist did a swab test from the flakes on my skin since it was peeling and they said I have MRSA. They gave me Bactrim. Is it Effective?

A doctor has provided 1 answer

A member asked:

Dermatologist prescribed bactrim (sulfamethoxazole and trimethoprim) for mrsa. It cleared for two months, now it came back. On bactrim (sulfamethoxazole and trimethoprim) again, little to no improvement halfway through.

A doctor has provided 1 answer

A member asked:

If I had a mrsa infection a month ago, folliculitis was treated with Bactrim (sulfamethoxazole and trimethoprim). Will I be colonized with mrsa from now on? Will I be a carrier?

2 doctors weighed in across 2 answers

A member asked:

Recently had a mrsa infection in groin area, red bumps. Treated with bactrim (sulfamethoxazole and trimethoprim) 2 weeks ago now I have vaginal burning, no sores. Could it still be mrsa?

A doctor has provided 1 answer

Sponsored Content
HealthTap Medical Group does not endorse products or services. Sponsored content revenues support our mission to make health information free and accessible to all.Learn more

People also searched for:

MRSA test came back negative, but may be false neg. How soon can someone retest if they were on Bactrim (sulfamethoxazole and trimethoprim) and topical antibiotics PRIOR to test/culture?
I have an ingrown toenail that I had to delay surgery on and it is infected with MRSA now. Doc put me on Bactrim a week ago but basically no improvement and now there is some blood in addition to pus. Procedure is Tuesday, do I need urgent care?
I was told I had MRSA and put on bactrim ds for 10 days, twice a day. After wanting to confirm dx, the dermo did a culture and it showed nothiing! dermo thinks its just back acne. He told me to finish bactrim then he will start me on doxycycline. Is that
UTI first treated with Cipro, (ciprofloxacin) 1 week later diagnosed with MRSA infection in groin area treated with Bactrim. UTI is back, could it be MRSA related?
Was prescribed bactrim DS for 7 days, take 2 800mg doses a day. I split the dosage over 14 days and took 1 800mg pill a day. Finished bactrim on Thursday, today is Saturday and I just noticed a decent sized bruise on back of thigh. Should I consult my doc

Telemedicine

Primary Care
Manage Your Conditions
Women's Health
Children's Health
Men's Health
Senior Health
Wellness, Prevention & Lifestyle
Sexual Health
Mental & Behavioral Health
Travel Medicine
Urgent Care
Ask your question
Didn't find what you're looking for?

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.

Ask your question

More of what we treat

Allergies
Antibiotics
Asthma
High Blood Pressure
Prescriptions
Type 2 Diabetes
Content on HealthTap (including answers) should not be used for medical advice, diagnosis, or treatment, and interactions on HealthTap do not create a doctor-patient relationship. Never disregard or delay professional medical advice in person because of anything on HealthTap. Call your doctor or 911 if you think you may have a medical emergency.
HealthTap
HIPAA logo
HIPAASecure
Soc 2 Type 2 logo
SOC 2 Type 2Certified
JCAHO Accredited
JCAHOAccredited
Member App

Download HealthTap

Video visit and message your doctor

Member App QR Code
Play Store Member LinkApp Store Member Link

Questions?

+1 (888) 828-0841support@healthtap.com
LinkedInTwitter
HomeTermsPrivacyCookiesDMCAHealth TopicsDoctors DirectoryDoctor Q&A by Specialty
Copyright 2026 HealthTap, Inc.