PAHs are formed by pyrogenic and petrogenic processes. There is no consensus on the exact number of pyrogenic exotoxins. His stay in hospital was even prolonged with pyrogenic drugs. It results from processes related to pyrogenic carbon capture and storage (PyCCS). It is sometimes confused with fumed silica (also known as pyrogenic silica, CAS number 112945-52-5). The disease is caused by secretion of pyrogenic exotoxins by the infecting "Streptococcus" bacteria. Multiple studies have demonstrated that pyrogenic carbon is stable over centennial timescales. Pyrogenic PAH sources consist of diesel soot tire rubber and coal dust. Streptococcal pyrogenic exotoxin A ("speA") is probably the best studied of these toxins. Thus, the vegetation is composed of pyrogenic heaths (family Ericaceae) and sedges (family Cyperaceae). In contrast, pyrogenic PAHs are formed through the incomplete combustion of organic material. Streptococcal pyrogenic exotoxins A, B, and C (speA, speB, and speC) have been identified. However, because it only detects LPS endotoxins, some pyrogenic materials can be missed. Pyrogenic flowering is the fire-stimulated flowering of plants in heathland and other fire-prone habitats.