Thank you for the query. Urinary tract infection is a common ailment, specially in young females (due to poor personal hygiene and use of unclean washrooms). Urinary tract infections are commonly diagnosed by symptoms (high grade fever, increased frequency of urination, burning during urination, pain in the loin or lower abdomen etc.). Urine for routine examination can be used for diagnosis, which reveals increased pus cells or sometimes red blood cells. However, urine culture may not be positive always. This occurs when the individual has already been exposed to an antibiotic before the culture sample was collected. Responding to antibiotics may not always be a criteria for this and resistant strains are very common. Blood investigations have probably been advised to check the infection parameters or maybe for blood culture. In the meantime I would advise her to drink plenty of fluids and maintain personal hygiene. Urinary alkaliniser may help. Acetaminophen may be taken for fever (but not 3gm per day). Since she has anemia (deficiency of blood) she can take oral iron and folic acid supplementation. Please do consult your physician for further advise. Hope this helps you out.