STRONGYLIIS (from the similar Greek word signifying round) is the term applied to a genus of the family strongylides (q.v.) of nematode parasitic worms. The only true strongylus infesting man is the S. bronchittlis of Cobbold, previously known as flaria hominis bronchialis, hamularia compressa, etc. The male usually measures rather more than half an inch. while the female is upward of an inch in length. For the general and specific characters of this rare entozoon, the reader is referred to Cobbold's Entowa, p. 357. The worm was originally discovered by Treutter in 1790, who found several individuals in the bronchial glands of an emaciated subject. In 1845 it was again found by Dr. Fortsitz at Klausenberg in Transylvania, in the lungs of a boy six years old. These are the buly two cases recorded by Knchentneister and Cobbold 'of its .cceurring in the human subject; but closely-allied species, S. paradoxes and S. micrurus, are ceca sionally found, according to Cobbold, in the lungs and eir-passages of the pig and the calf respectively, and Ktiehenmeister states that he has found a species in the lungs of the sheep.
Closely allied to strongylus is the genus eustrongylus of Diesing and Cobbold, which contains the species B. gigas, more commonly known as the strongylus gigas of Rodolphe, envier, and others. This is the largest nematode worm at present known to infest men
or any other animal; " the male measuring from ten inches to a foot in length, and of an inch in breadth; while the female is said to attain a length of over 3 feet, its trans• verse diameter being fully half an inch; body cylindrical, end more or less tinged with redness; head obtuse, and furnished with a simple oval aperture surrounded by six chitinous nodules: mode of reproduction, probably viviparous; eggs broadly oval, meas uring about from pole to pole."—Op. eit., p. 358. This worm occurs, according to Bieniser, in the kidneys and bladder, sometimes in the abdominal cavity and the emen tum, more rarely in the lungs and liver of "martens, dogs, wolves, seals, otters, oxen, and horses." Fortunately it is very rare in man, and, according to Cobbold, weasels are the animals in which it is most commonly found. The symptoms to which it must give rise must be much the same as those arising from abscess and degeneration of one of the kidneys, or from renal calculi. The diagnosis in a suspected case could only be established by the detection of the eggs or embryos in the urine.