This includes ascariasis, hookworm infections, enterobiasis (pinworm infection), trichostrongyliasis, and trichinellosis. Eggs may contain a developing embryo or a fully developed pinworm larva. Painful urination has been associated with pinworm infection. Medication is the primary treatment for pinworm infection. Experimental ingestion of pinworm eggs established infection in two investigators. The cause of a pinworm infection is the worm "Enterobius vermicularis". One-third of individuals with pinworm infection are totally asymptomatic. The stigma associated with pinworm infection is hence considered a possible over-emphasis. Concomitant pinworm infection should also be excluded, although the association has not been proven. The disease is spread between people by pinworm eggs. It consists of four families, one of which contains the human pinworm ("Enterobius vermicularis"). It consists of eight genera, one of which contains the human pinworm ("Enterobius vermicularis"). The seeds from the pod are useful for treating Roundworm and Pinworm. Lactonization is a key step in the synthesis of tomato pinworm sex pheromone. Throughout this article, the word "pinworm" refers to "Enterobius".