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Educational Articles

Medical Conditions

  • Infection in the foot is by far, the most common cause of acute (sudden), single-leg lameness in the horse. Infection results in painful inflammation and pus (abscess) formation.

  • Pyelonephritis is an upper urinary tract infection. Many dogs have no clinical signs when they have pyelonephritis, although they may have signs of lower urinary tract disease. Pyelonephritis is usually caused by a bacterial infection that moves up the urinary tract from the bladder to the kidneys. There are several developmental, medical, and procedural conditions that increase the risk for pyelonephritis. Antibiotics are used to treat pyelonephritis and are chosen based on testing the urine for bacteria and antibiotic sensitivity. Overall, dogs with sudden pyelonephritis do well and return to normal health with appropriate treatment unless they also have kidney stones, chronic kidney disease, urinary tract obstruction, or cancer in the urinary tract.

  • Pyelonephritis is an upper urinary tract infection involving the kidneys and ureters. Many cats have no clinical signs when they have pyelonephritis, although they may have signs of lower urinary tract disease. Pyelonephritis is usually caused by a bacterial infection that moves up the urinary tract from the bladder to the kidneys. Cats with sudden pyelonephritis do well and return to normal health unless concurrent complications exist.

  • Pyoderma is a bacterial skin infection that can affect all areas of the skin, including skin folds, often seen as red, pus-filled pustules. Treatment may require oral or topical medications and it is always a good idea to practice good hygiene. Pyoderma carries a good prognosis for recovery but recurring or chronic cases may require longer treatment and additional testing to determine an underlying cause.

  • Pyometra is a serious and life-threatening infection in the uterus, occurring in female cats who have not been spayed. The condition must be treated quickly and aggressively. The preferred treatment is to surgically remove the uterus and ovaries by performing an ovariohysterectomy. There is a medical approach to treating pyometra, although the success rate is highly variable and not without considerable risk and potential long-term complications. 

  • Pyometra is a serious and life-threatening infection in the uterus, occurring in female dogs who have not been spayed. The condition must be treated quickly and aggressively. The preferred treatment is to surgically remove the uterus and ovaries by performing an ovariohysterectomy. There is a medical approach to treating pyometra, although the success rate is highly variable and not without considerable risk and potential long-term complications.

  • Pyothorax is the presence of inflammatory fluid or pus within the chest cavity, which is the area between the lungs and the inner walls of the ribs. Signs of pyothorax include rapid, shallow, open-mouthed breathing that may be painful, depression, lethargy, decreased appetite. Clinical examination by a veterinarian, particularly listening to the chest with a stethoscope, may indicate fluid in the chest.

  • Pyothorax occurs when pus or inflammatory fluids collect in the space around the lungs causing fever, anorexia, lethargy, and difficulty breathing. It is diagnosed through history, physical exam, radiographs, and thoracocentesis. Treatment with oral antibiotics is essential and may involve repeated thoracocentesis or the placement of a chest drain.

  • Pythiosis is a waterborne infection that can infect the GI tract or skin of dogs. It can cause extreme weight loss, vomiting, diarrhea or skin lesions such as ulcerating nodules and draining tracts. This disease is more common in southern regions. Treatment involves surgical removal of all affected material if possible, including limb amputation if indicated. Different antifungal therapies have shown some efficacy and need to be continued long-term. Prognosis for resolution of pythiosis is guarded to poor.

  • Quittor is an old term for a condition that involves death and destruction (necrosis) of the collateral cartilages of the foot (see our information sheet on sidebones), following an infection in the foot (see our information sheet on pus in the foot).