Oak processionary the same manner. Oak is its preferred food source, but the moth also eats the leaves of hazel, hornbeam, sweet chestnut, birch and beech. The moths pose an increasing threat to humans as their range is extended. The backs of older caterpillars (3rd to 6th instars) are covered with up to 63,000 pointed defensive bristles, which contain an urticating toxin (e.g., the protein thaumetopoein). The setae break off readily, become airborne and can cause epidemic caterpillar dermatitis (lepidopterism), manifested as a papular rash, pruritus, conjunctivitis and, if inhaled, pharyngitis and respiratory distress, including asthma or even anaphylaxis; however, as of
Canadian Science Centre for Human and Animal Health the only facility in Canada operating Containment Level 4 (CL4) laboratories and is believed to be the first in the world to have both human and animal Level 4 laboratories under one roof. Level 4 laboratories are designed to allow scientists to safely handle the most serious infectious agents. Their design, construction, and engineering controls safeguard against the release of any infectious material. Both NML and NCFAD operate critical diagnostic testing programs relied on across the country. These programs protect human health, animal health, and international trade. Staff also undertake cutting-edge research to advance scientific knowledge, improve diagnostics and develop