Kidney stones could be a cause. Sometimes when a kidney stone is passed it causes a little bleeding.
viral infection
A skin culture is a test that is done to identify the microorganism (bacteria, fungus, or virus) causing a skin infection and to determine the antibiotic or other treatment that will effectively treat the infection.
Stool culture is a test to identify bacteria in patients with a suspected infection of the digestive tract.
Probably streph throat infection...could also be a staph infection. Maybe even Mononeucleosis
Culture refers to a test that is commonly done in a lab to grow the organism that's causing an infection.
Stool culture is performed to identify bacteria or other organisms in persons with symptoms of gastrointestinal infection, most commonly diarrhea.
It means flagyl wont work for that infection
A urine culture is a type of urine test that looks for the presence of germs or bacteria. The test is normally carried out when a urinary tract infection is suspected.
You could possible have a kidney stone if you are seeing blood in your urine. If you have no infection, ask the doctor to check for kidney stones.
A microorganism is considered to be a cause of the infection if it is either the only or predominant microorganism that grew, if it grew in large numbers, or if it is known to produce infection.
It's possible that the urine culture was negative for bacteria, and the health care provider was treating you for trichomoniasis, a parasitic infection that is spread from sex.
Surgery should be postponed until the infection has cleared.