Panicle hydrangea (H. paniculata) is the most cold hardy member of the genus. It can be reliably grown in USDA cold-hardiness zones 4 to 7. Native to Asia, it grows 10 to 15 feet tall. Large creamy-white flowers, which are borne in 6- to 18-inch long panicles, are produced in mid-summer (see image at left).
Life cycle. Trichinella spiralis can live the majority of its adult life in the intestines of humans. To begin its life cycle, Trichinella spiralis adults will invade the intestinal wall of a pig, and produce larvae that invade the pig's muscles. The larval forms are encapsulated as a small cystic structure within a muscle cell of the infected host.
Ascaris lumbricoides. Ascaris lumbricoides, the giant roundworm, are the largest nematode that is a parasite to humans. They grow up to 30 cm in length. They live in the small intestine of humans. These worms reproduce inside the small intestine and the eggs pass out in the stool. After two weeks the eggs become infectious.