Stool antigen detection tests have helped to overcome some of the limitations of stool microscopy. Symptoms include abdominal pain, diarrhea, bloody stool, or blood in the urine. Light colored stool or dark urine may also occur. Diagnosis is typically made by blood, urine, and stool tests. Diagnosis is by finding eggs of the parasite in a person's urine or stool. Exudative diarrhea occurs with the presence of blood and pus in the stool. In chronic pancreatitis weight loss, fatty stool, and diarrhea may occur. Porphyria is diagnosed through biochemical analysis of blood, urine, and stool. In general, testing involves sending samples of blood, stool, and urine to a reference laboratory. Parvovirus causes lethargy, abdominal pain, vomiting, bloody stool, and fever. His easel, folding stool and brushes stood before the coffin. Sometimes special furniture is used, such as a "queening stool" or "smotherbox". Diagnosis is often based on direct observation of blood in the stool or vomit. Vomiting, blood in the stool, and fever are less common. In their normal state, they are cushions that help with stool control.