Secondary hypertension is more common in preadolescent children, with most cases caused by renal disease. Primary or essential hypertension is more common in adolescents and has multiple risk factors, including obesity and a family history of hypertension.
Midge (family Chironomidae), also called chironomid, nonbiting midge, or gnat, any of a group of tiny two-winged flies (order Diptera) that superficially resemble mosquitoes. Although they resemble mosquitoes, midges are harmless, with small mouthparts that are not elongated into a piercing structure for blood feeding. They do not have scales on wings or body, and the pattern of wing veins differs from that of mosquitoes. The male antennae are feathery.
3. Gall midges-small delicate flies that are about 1/4 inches long, and have antennae. The maggot larvae are what produce the galls. Gall midges winter in galls and emerge in the spring. 4. Gall wasps (also known as Cynipids) - Wasp larvae that are formed usually on oaks. Although the number of gall producing organisms are numerous, there are only a few host plants available for them to inhabit. This severely limits the types of trees these insects can inhabit.