Sometimes during the processing of violtoil or biofuels, the resulting substance may get contaminated by a pathogen of, as of now, uncertain origin. This microorganism may infect humans and animals, further spreading through exposure to the contaminated fluids. Contact with liquid or sprayed substances has a medium chance of transmission, but that of oral ingestion is very high. The first two weeks are characterised by similar symptoms to malaria, and the disease is commonly misdiagnosed as it. The third week usually begins with the addition of mild psychosis, photophobia, worsening eyesight and symptoms of petroleum poisoning. By the fourth week the individual completely loses eyesight as the eyes turn dark. The subject suffers from heavy petroleum poisoning. Between the fifth and sixth weeks the individual should suffer from fits of agony, and the vomiting of an oil-like substance will begin, alongside a rupture of the eyeballs, spreading infected material. As the subject dies from terminal petroleum poisoning, the post-death excretion will invariably include large amounts of crude oil through the urethra and rectum. Over the next two weeks, the rest of the body will invariably dissolve into an oily soup. If an autopsy is conducted before this happens, it will invariably reveal a liquefaction of several organs into oil, beginning with the intestines and muscles. Oil extracted from an individual can be readily refined into high quality fuels. As of the year 1961, biochemical testing can be done on batches of violtoil to detect the presence of the hydrocarbon disease, but some refineries still lack the expensive equipment needed to do so. Decontamination procedures are also available.